Merge pull request #2 from hanxuanyu/feature/multi-region-fetch

支持多地区数据切换，优化数据存储结构，基于图片名分类存储，避免重复下载

CONFIG.md

@@ -36,11 +36,15 @@ BingPaper 支持通过配置文件（YAML）和环境变量进行配置。
 - `mode`: API 行为模式。
     - `local`: (默认) 接口直接返回图片的二进制流，适合图片存储对外部不可见的情况。
     - `redirect`: 接口返回 302 重定向到图片的 `PublicURL`，适合配合 S3 或 WebDAV 的公共访问。
+- `enable_mkt_fallback`: 当请求的地区不存在或无数据时，是否允许兜底回退到默认地区或任意可用地区，默认 `true`。
 
 #### cron (定时任务)
 - `enabled`: 是否启用定时抓取，默认 `true`。
 - `daily_spec`: Cron 表达式，定义每日抓取时间。默认 `"0 10 * * *"` (每日上午 10:00)。
 
+#### fetcher (抓取配置)
+- `regions`: 需要抓取的地区编码列表（如 `zh-CN`, `en-US` 等）。如果不设置，默认为包括主要国家在内的 17 个地区。
+
 #### retention (数据保留)
 - `days`: 图片及元数据保留天数。超过此天数的数据可能会被清理任务处理。设置为 `0` 表示永久保留，不进行自动清理。默认 `0`。
 

README.md

@@ -57,6 +57,7 @@ go run .
 - `GET /api/v1/image/random`：返回随机图片
 - `GET /api/v1/image/date/:yyyy-mm-dd`：返回指定日期图片
 - **查询参数**：
+  - `mkt`：地区编码 (zh-CN, en-US, ja-JP 等)，默认 `zh-CN`
   - `variant`：分辨率 (UHD, 1920x1080, 1366x768)，默认 `UHD`
   - `format`：格式 (jpg)，默认 `jpg`
 

config.example.yaml

@@ -16,6 +16,8 @@ log:
 
 api:
   mode: local # local | redirect
+  enable_mkt_fallback: true # 当请求的地区不存在时，是否回退到默认地区
+  enable_on_demand_fetch: false # 是否开启按需抓取（当数据库中没有请求的地区图片时，实时从 Bing 抓取）
 
 cron:
   enabled: true

docs/docs.go

@@ -413,6 +413,12 @@ const docTemplate = `{
                         "in": "path",
                         "required": true
                     },
+                    {
+                        "type": "string",
+                        "description": "地区编码 (如 zh-CN, en-US)",
+                        "name": "mkt",
+                        "in": "query"
+                    },
                     {
                         "type": "string",
                         "default": "UHD",
@@ -434,6 +440,24 @@ const docTemplate = `{
                         "schema": {
                             "type": "file"
                         }
+                    },
+                    "202": {
+                        "description": "按需抓取任务已启动",
+                        "schema": {
+                            "type": "object",
+                            "additionalProperties": {
+                                "type": "string"
+                            }
+                        }
+                    },
+                    "404": {
+                        "description": "图片未找到，响应体包含具体原因",
+                        "schema": {
+                            "type": "object",
+                            "additionalProperties": {
+                                "type": "string"
+                            }
+                        }
                     }
                 }
             }
@@ -455,6 +479,12 @@ const docTemplate = `{
                         "name": "date",
                         "in": "path",
                         "required": true
+                    },
+                    {
+                        "type": "string",
+                        "description": "地区编码 (如 zh-CN, en-US)",
+                        "name": "mkt",
+                        "in": "query"
                     }
                 ],
                 "responses": {
@@ -463,6 +493,24 @@ const docTemplate = `{
                         "schema": {
                             "$ref": "#/definitions/handlers.ImageMetaResp"
                         }
+                    },
+                    "202": {
+                        "description": "按需抓取任务已启动",
+                        "schema": {
+                            "type": "object",
+                            "additionalProperties": {
+                                "type": "string"
+                            }
+                        }
+                    },
+                    "404": {
+                        "description": "图片未找到，响应体包含具体原因",
+                        "schema": {
+                            "type": "object",
+                            "additionalProperties": {
+                                "type": "string"
+                            }
+                        }
                     }
                 }
             }
@@ -478,6 +526,12 @@ const docTemplate = `{
                 ],
                 "summary": "获取随机图片",
                 "parameters": [
+                    {
+                        "type": "string",
+                        "description": "地区编码 (如 zh-CN, en-US)",
+                        "name": "mkt",
+                        "in": "query"
+                    },
                     {
                         "type": "string",
                         "default": "UHD",
@@ -499,6 +553,24 @@ const docTemplate = `{
                         "schema": {
                             "type": "file"
                         }
+                    },
+                    "202": {
+                        "description": "按需抓取任务已启动",
+                        "schema": {
+                            "type": "object",
+                            "additionalProperties": {
+                                "type": "string"
+                            }
+                        }
+                    },
+                    "404": {
+                        "description": "图片未找到，响应体包含具体原因",
+                        "schema": {
+                            "type": "object",
+                            "additionalProperties": {
+                                "type": "string"
+                            }
+                        }
                     }
                 }
             }
@@ -513,12 +585,38 @@ const docTemplate = `{
                     "image"
                 ],
                 "summary": "获取随机图片元数据",
+                "parameters": [
+                    {
+                        "type": "string",
+                        "description": "地区编码 (如 zh-CN, en-US)",
+                        "name": "mkt",
+                        "in": "query"
+                    }
+                ],
                 "responses": {
                     "200": {
                         "description": "OK",
                         "schema": {
                             "$ref": "#/definitions/handlers.ImageMetaResp"
                         }
+                    },
+                    "202": {
+                        "description": "按需抓取任务已启动",
+                        "schema": {
+                            "type": "object",
+                            "additionalProperties": {
+                                "type": "string"
+                            }
+                        }
+                    },
+                    "404": {
+                        "description": "图片未找到，响应体包含具体原因",
+                        "schema": {
+                            "type": "object",
+                            "additionalProperties": {
+                                "type": "string"
+                            }
+                        }
                     }
                 }
             }
@@ -534,6 +632,12 @@ const docTemplate = `{
                 ],
                 "summary": "获取今日图片",
                 "parameters": [
+                    {
+                        "type": "string",
+                        "description": "地区编码 (如 zh-CN, en-US)",
+                        "name": "mkt",
+                        "in": "query"
+                    },
                     {
                         "type": "string",
                         "default": "UHD",
@@ -555,6 +659,24 @@ const docTemplate = `{
                         "schema": {
                             "type": "file"
                         }
+                    },
+                    "202": {
+                        "description": "按需抓取任务已启动",
+                        "schema": {
+                            "type": "object",
+                            "additionalProperties": {
+                                "type": "string"
+                            }
+                        }
+                    },
+                    "404": {
+                        "description": "图片未找到，响应体包含具体原因",
+                        "schema": {
+                            "type": "object",
+                            "additionalProperties": {
+                                "type": "string"
+                            }
+                        }
                     }
                 }
             }
@@ -569,12 +691,38 @@ const docTemplate = `{
                     "image"
                 ],
                 "summary": "获取今日图片元数据",
+                "parameters": [
+                    {
+                        "type": "string",
+                        "description": "地区编码 (如 zh-CN, en-US)",
+                        "name": "mkt",
+                        "in": "query"
+                    }
+                ],
                 "responses": {
                     "200": {
                         "description": "OK",
                         "schema": {
                             "$ref": "#/definitions/handlers.ImageMetaResp"
                         }
+                    },
+                    "202": {
+                        "description": "按需抓取任务已启动",
+                        "schema": {
+                            "type": "object",
+                            "additionalProperties": {
+                                "type": "string"
+                            }
+                        }
+                    },
+                    "404": {
+                        "description": "图片未找到，响应体包含具体原因",
+                        "schema": {
+                            "type": "object",
+                            "additionalProperties": {
+                                "type": "string"
+                            }
+                        }
                     }
                 }
             }
@@ -614,6 +762,12 @@ const docTemplate = `{
                         "description": "按月份过滤 (格式: YYYY-MM)",
                         "name": "month",
                         "in": "query"
+                    },
+                    {
+                        "type": "string",
+                        "description": "地区编码 (如 zh-CN, en-US)",
+                        "name": "mkt",
+                        "in": "query"
                     }
                 ],
                 "responses": {
@@ -628,12 +782,66 @@ const docTemplate = `{
                     }
                 }
             }
+        },
+        "/images/global/today": {
+            "get": {
+                "description": "获取配置文件中所有已开启地区的今日必应图片元数据（缩略图）",
+                "produces": [
+                    "application/json"
+                ],
+                "tags": [
+                    "image"
+                ],
+                "summary": "获取所有地区的今日图片列表",
+                "responses": {
+                    "200": {
+                        "description": "OK",
+                        "schema": {
+                            "type": "array",
+                            "items": {
+                                "$ref": "#/definitions/handlers.ImageMetaResp"
+                            }
+                        }
+                    }
+                }
+            }
+        },
+        "/regions": {
+            "get": {
+                "description": "返回系统支持的所有必应地区编码及标签。如果配置中指定了抓取地区，这些地区将排在列表最前面（置顶）。",
+                "produces": [
+                    "application/json"
+                ],
+                "tags": [
+                    "image"
+                ],
+                "summary": "获取支持的地区列表",
+                "responses": {
+                    "200": {
+                        "description": "OK",
+                        "schema": {
+                            "type": "array",
+                            "items": {
+                                "$ref": "#/definitions/util.Region"
+                            }
+                        }
+                    }
+                }
+            }
         }
     },
     "definitions": {
         "config.APIConfig": {
             "type": "object",
             "properties": {
+                "enableMktFallback": {
+                    "description": "当请求的地区不存在时，是否回退到默认地区",
+                    "type": "boolean"
+                },
+                "enableOnDemandFetch": {
+                    "description": "是否启用按需抓取",
+                    "type": "boolean"
+                },
                 "mode": {
                     "description": "local | redirect",
                     "type": "string"
@@ -666,6 +874,9 @@ const docTemplate = `{
                 "feature": {
                     "$ref": "#/definitions/config.FeatureConfig"
                 },
+                "fetcher": {
+                    "$ref": "#/definitions/config.FetcherConfig"
+                },
                 "log": {
                     "$ref": "#/definitions/config.LogConfig"
                 },
@@ -717,6 +928,17 @@ const docTemplate = `{
                 }
             }
         },
+        "config.FetcherConfig": {
+            "type": "object",
+            "properties": {
+                "regions": {
+                    "type": "array",
+                    "items": {
+                        "type": "string"
+                    }
+                }
+            }
+        },
         "config.LocalConfig": {
             "type": "object",
             "properties": {
@@ -917,6 +1139,9 @@ const docTemplate = `{
                 "hsh": {
                     "type": "string"
                 },
+                "mkt": {
+                    "type": "string"
+                },
                 "quiz": {
                     "type": "string"
                 },
@@ -1006,6 +1231,17 @@ const docTemplate = `{
                     "type": "string"
                 }
             }
+        },
+        "util.Region": {
+            "type": "object",
+            "properties": {
+                "label": {
+                    "type": "string"
+                },
+                "value": {
+                    "type": "string"
+                }
+            }
         }
     },
     "securityDefinitions": {

docs/swagger.json

@@ -407,6 +407,12 @@
                         "in": "path",
                         "required": true
                     },
+                    {
+                        "type": "string",
+                        "description": "地区编码 (如 zh-CN, en-US)",
+                        "name": "mkt",
+                        "in": "query"
+                    },
                     {
                         "type": "string",
                         "default": "UHD",
@@ -428,6 +434,24 @@
                         "schema": {
                             "type": "file"
                         }
+                    },
+                    "202": {
+                        "description": "按需抓取任务已启动",
+                        "schema": {
+                            "type": "object",
+                            "additionalProperties": {
+                                "type": "string"
+                            }
+                        }
+                    },
+                    "404": {
+                        "description": "图片未找到，响应体包含具体原因",
+                        "schema": {
+                            "type": "object",
+                            "additionalProperties": {
+                                "type": "string"
+                            }
+                        }
                     }
                 }
             }
@@ -449,6 +473,12 @@
                         "name": "date",
                         "in": "path",
                         "required": true
+                    },
+                    {
+                        "type": "string",
+                        "description": "地区编码 (如 zh-CN, en-US)",
+                        "name": "mkt",
+                        "in": "query"
                     }
                 ],
                 "responses": {
@@ -457,6 +487,24 @@
                         "schema": {
                             "$ref": "#/definitions/handlers.ImageMetaResp"
                         }
+                    },
+                    "202": {
+                        "description": "按需抓取任务已启动",
+                        "schema": {
+                            "type": "object",
+                            "additionalProperties": {
+                                "type": "string"
+                            }
+                        }
+                    },
+                    "404": {
+                        "description": "图片未找到，响应体包含具体原因",
+                        "schema": {
+                            "type": "object",
+                            "additionalProperties": {
+                                "type": "string"
+                            }
+                        }
                     }
                 }
             }
@@ -472,6 +520,12 @@
                 ],
                 "summary": "获取随机图片",
                 "parameters": [
+                    {
+                        "type": "string",
+                        "description": "地区编码 (如 zh-CN, en-US)",
+                        "name": "mkt",
+                        "in": "query"
+                    },
                     {
                         "type": "string",
                         "default": "UHD",
@@ -493,6 +547,24 @@
                         "schema": {
                             "type": "file"
                         }
+                    },
+                    "202": {
+                        "description": "按需抓取任务已启动",
+                        "schema": {
+                            "type": "object",
+                            "additionalProperties": {
+                                "type": "string"
+                            }
+                        }
+                    },
+                    "404": {
+                        "description": "图片未找到，响应体包含具体原因",
+                        "schema": {
+                            "type": "object",
+                            "additionalProperties": {
+                                "type": "string"
+                            }
+                        }
                     }
                 }
             }
@@ -507,12 +579,38 @@
                     "image"
                 ],
                 "summary": "获取随机图片元数据",
+                "parameters": [
+                    {
+                        "type": "string",
+                        "description": "地区编码 (如 zh-CN, en-US)",
+                        "name": "mkt",
+                        "in": "query"
+                    }
+                ],
                 "responses": {
                     "200": {
                         "description": "OK",
                         "schema": {
                             "$ref": "#/definitions/handlers.ImageMetaResp"
                         }
+                    },
+                    "202": {
+                        "description": "按需抓取任务已启动",
+                        "schema": {
+                            "type": "object",
+                            "additionalProperties": {
+                                "type": "string"
+                            }
+                        }
+                    },
+                    "404": {
+                        "description": "图片未找到，响应体包含具体原因",
+                        "schema": {
+                            "type": "object",
+                            "additionalProperties": {
+                                "type": "string"
+                            }
+                        }
                     }
                 }
             }
@@ -528,6 +626,12 @@
                 ],
                 "summary": "获取今日图片",
                 "parameters": [
+                    {
+                        "type": "string",
+                        "description": "地区编码 (如 zh-CN, en-US)",
+                        "name": "mkt",
+                        "in": "query"
+                    },
                     {
                         "type": "string",
                         "default": "UHD",
@@ -549,6 +653,24 @@
                         "schema": {
                             "type": "file"
                         }
+                    },
+                    "202": {
+                        "description": "按需抓取任务已启动",
+                        "schema": {
+                            "type": "object",
+                            "additionalProperties": {
+                                "type": "string"
+                            }
+                        }
+                    },
+                    "404": {
+                        "description": "图片未找到，响应体包含具体原因",
+                        "schema": {
+                            "type": "object",
+                            "additionalProperties": {
+                                "type": "string"
+                            }
+                        }
                     }
                 }
             }
@@ -563,12 +685,38 @@
                     "image"
                 ],
                 "summary": "获取今日图片元数据",
+                "parameters": [
+                    {
+                        "type": "string",
+                        "description": "地区编码 (如 zh-CN, en-US)",
+                        "name": "mkt",
+                        "in": "query"
+                    }
+                ],
                 "responses": {
                     "200": {
                         "description": "OK",
                         "schema": {
                             "$ref": "#/definitions/handlers.ImageMetaResp"
                         }
+                    },
+                    "202": {
+                        "description": "按需抓取任务已启动",
+                        "schema": {
+                            "type": "object",
+                            "additionalProperties": {
+                                "type": "string"
+                            }
+                        }
+                    },
+                    "404": {
+                        "description": "图片未找到，响应体包含具体原因",
+                        "schema": {
+                            "type": "object",
+                            "additionalProperties": {
+                                "type": "string"
+                            }
+                        }
                     }
                 }
             }
@@ -608,6 +756,12 @@
                         "description": "按月份过滤 (格式: YYYY-MM)",
                         "name": "month",
                         "in": "query"
+                    },
+                    {
+                        "type": "string",
+                        "description": "地区编码 (如 zh-CN, en-US)",
+                        "name": "mkt",
+                        "in": "query"
                     }
                 ],
                 "responses": {
@@ -622,12 +776,66 @@
                     }
                 }
             }
+        },
+        "/images/global/today": {
+            "get": {
+                "description": "获取配置文件中所有已开启地区的今日必应图片元数据（缩略图）",
+                "produces": [
+                    "application/json"
+                ],
+                "tags": [
+                    "image"
+                ],
+                "summary": "获取所有地区的今日图片列表",
+                "responses": {
+                    "200": {
+                        "description": "OK",
+                        "schema": {
+                            "type": "array",
+                            "items": {
+                                "$ref": "#/definitions/handlers.ImageMetaResp"
+                            }
+                        }
+                    }
+                }
+            }
+        },
+        "/regions": {
+            "get": {
+                "description": "返回系统支持的所有必应地区编码及标签。如果配置中指定了抓取地区，这些地区将排在列表最前面（置顶）。",
+                "produces": [
+                    "application/json"
+                ],
+                "tags": [
+                    "image"
+                ],
+                "summary": "获取支持的地区列表",
+                "responses": {
+                    "200": {
+                        "description": "OK",
+                        "schema": {
+                            "type": "array",
+                            "items": {
+                                "$ref": "#/definitions/util.Region"
+                            }
+                        }
+                    }
+                }
+            }
         }
     },
     "definitions": {
         "config.APIConfig": {
             "type": "object",
             "properties": {
+                "enableMktFallback": {
+                    "description": "当请求的地区不存在时，是否回退到默认地区",
+                    "type": "boolean"
+                },
+                "enableOnDemandFetch": {
+                    "description": "是否启用按需抓取",
+                    "type": "boolean"
+                },
                 "mode": {
                     "description": "local | redirect",
                     "type": "string"
@@ -660,6 +868,9 @@
                 "feature": {
                     "$ref": "#/definitions/config.FeatureConfig"
                 },
+                "fetcher": {
+                    "$ref": "#/definitions/config.FetcherConfig"
+                },
                 "log": {
                     "$ref": "#/definitions/config.LogConfig"
                 },
@@ -711,6 +922,17 @@
                 }
             }
         },
+        "config.FetcherConfig": {
+            "type": "object",
+            "properties": {
+                "regions": {
+                    "type": "array",
+                    "items": {
+                        "type": "string"
+                    }
+                }
+            }
+        },
         "config.LocalConfig": {
             "type": "object",
             "properties": {
@@ -911,6 +1133,9 @@
                 "hsh": {
                     "type": "string"
                 },
+                "mkt": {
+                    "type": "string"
+                },
                 "quiz": {
                     "type": "string"
                 },
@@ -1000,6 +1225,17 @@
                     "type": "string"
                 }
             }
+        },
+        "util.Region": {
+            "type": "object",
+            "properties": {
+                "label": {
+                    "type": "string"
+                },
+                "value": {
+                    "type": "string"
+                }
+            }
         }
     },
     "securityDefinitions": {

docs/swagger.yaml

@@ -2,6 +2,12 @@ basePath: /api/v1
 definitions:
   config.APIConfig:
     properties:
+      enableMktFallback:
+        description: 当请求的地区不存在时，是否回退到默认地区
+        type: boolean
+      enableOnDemandFetch:
+        description: 是否启用按需抓取
+        type: boolean
       mode:
         description: local | redirect
         type: string
@@ -23,6 +29,8 @@ definitions:
         $ref: '#/definitions/config.DBConfig'
       feature:
         $ref: '#/definitions/config.FeatureConfig'
+      fetcher:
+        $ref: '#/definitions/config.FetcherConfig'
       log:
         $ref: '#/definitions/config.LogConfig'
       retention:
@@ -56,6 +64,13 @@ definitions:
       writeDailyFiles:
         type: boolean
     type: object
+  config.FetcherConfig:
+    properties:
+      regions:
+        items:
+          type: string
+        type: array
+    type: object
   config.LocalConfig:
     properties:
       root:
@@ -190,6 +205,8 @@ definitions:
         type: string
       hsh:
         type: string
+      mkt:
+        type: string
       quiz:
         type: string
       startdate:
@@ -248,6 +265,13 @@ definitions:
       updated_at:
         type: string
     type: object
+  util.Region:
+    properties:
+      label:
+        type: string
+      value:
+        type: string
+    type: object
 host: localhost:8080
 info:
   contact: {}
@@ -501,6 +525,10 @@ paths:
         name: date
         required: true
         type: string
+      - description: 地区编码 (如 zh-CN, en-US)
+        in: query
+        name: mkt
+        type: string
       - default: UHD
         description: 分辨率
         in: query
@@ -518,6 +546,18 @@ paths:
           description: OK
           schema:
             type: file
+        "202":
+          description: 按需抓取任务已启动
+          schema:
+            additionalProperties:
+              type: string
+            type: object
+        "404":
+          description: 图片未找到，响应体包含具体原因
+          schema:
+            additionalProperties:
+              type: string
+            type: object
       summary: 获取指定日期图片
       tags:
       - image
@@ -530,6 +570,10 @@ paths:
         name: date
         required: true
         type: string
+      - description: 地区编码 (如 zh-CN, en-US)
+        in: query
+        name: mkt
+        type: string
       produces:
       - application/json
       responses:
@@ -537,6 +581,18 @@ paths:
           description: OK
           schema:
             $ref: '#/definitions/handlers.ImageMetaResp'
+        "202":
+          description: 按需抓取任务已启动
+          schema:
+            additionalProperties:
+              type: string
+            type: object
+        "404":
+          description: 图片未找到，响应体包含具体原因
+          schema:
+            additionalProperties:
+              type: string
+            type: object
       summary: 获取指定日期图片元数据
       tags:
       - image
@@ -544,6 +600,10 @@ paths:
     get:
       description: 随机返回一张已抓取的图片流或重定向
       parameters:
+      - description: 地区编码 (如 zh-CN, en-US)
+        in: query
+        name: mkt
+        type: string
       - default: UHD
         description: 分辨率
         in: query
@@ -561,12 +621,29 @@ paths:
           description: OK
           schema:
             type: file
+        "202":
+          description: 按需抓取任务已启动
+          schema:
+            additionalProperties:
+              type: string
+            type: object
+        "404":
+          description: 图片未找到，响应体包含具体原因
+          schema:
+            additionalProperties:
+              type: string
+            type: object
       summary: 获取随机图片
       tags:
       - image
   /image/random/meta:
     get:
       description: 随机获取一张已抓取图片的元数据
+      parameters:
+      - description: 地区编码 (如 zh-CN, en-US)
+        in: query
+        name: mkt
+        type: string
       produces:
       - application/json
       responses:
@@ -574,6 +651,18 @@ paths:
           description: OK
           schema:
             $ref: '#/definitions/handlers.ImageMetaResp'
+        "202":
+          description: 按需抓取任务已启动
+          schema:
+            additionalProperties:
+              type: string
+            type: object
+        "404":
+          description: 图片未找到，响应体包含具体原因
+          schema:
+            additionalProperties:
+              type: string
+            type: object
       summary: 获取随机图片元数据
       tags:
       - image
@@ -581,6 +670,10 @@ paths:
     get:
       description: 根据参数返回今日必应图片流或重定向
       parameters:
+      - description: 地区编码 (如 zh-CN, en-US)
+        in: query
+        name: mkt
+        type: string
       - default: UHD
         description: 分辨率 (UHD, 1920x1080, 1366x768, 1280x720, 1024x768, 800x600, 800x480,
           640x480, 640x360, 480x360, 400x240, 320x240)
@@ -599,12 +692,29 @@ paths:
           description: OK
           schema:
             type: file
+        "202":
+          description: 按需抓取任务已启动
+          schema:
+            additionalProperties:
+              type: string
+            type: object
+        "404":
+          description: 图片未找到，响应体包含具体原因
+          schema:
+            additionalProperties:
+              type: string
+            type: object
       summary: 获取今日图片
       tags:
       - image
   /image/today/meta:
     get:
       description: 获取今日必应图片的标题、版权等元数据
+      parameters:
+      - description: 地区编码 (如 zh-CN, en-US)
+        in: query
+        name: mkt
+        type: string
       produces:
       - application/json
       responses:
@@ -612,6 +722,18 @@ paths:
           description: OK
           schema:
             $ref: '#/definitions/handlers.ImageMetaResp'
+        "202":
+          description: 按需抓取任务已启动
+          schema:
+            additionalProperties:
+              type: string
+            type: object
+        "404":
+          description: 图片未找到，响应体包含具体原因
+          schema:
+            additionalProperties:
+              type: string
+            type: object
       summary: 获取今日图片元数据
       tags:
       - image
@@ -637,6 +759,10 @@ paths:
         in: query
         name: month
         type: string
+      - description: 地区编码 (如 zh-CN, en-US)
+        in: query
+        name: mkt
+        type: string
       produces:
       - application/json
       responses:
@@ -649,6 +775,36 @@ paths:
       summary: 获取图片列表
       tags:
       - image
+  /images/global/today:
+    get:
+      description: 获取配置文件中所有已开启地区的今日必应图片元数据（缩略图）
+      produces:
+      - application/json
+      responses:
+        "200":
+          description: OK
+          schema:
+            items:
+              $ref: '#/definitions/handlers.ImageMetaResp'
+            type: array
+      summary: 获取所有地区的今日图片列表
+      tags:
+      - image
+  /regions:
+    get:
+      description: 返回系统支持的所有必应地区编码及标签。如果配置中指定了抓取地区，这些地区将排在列表最前面（置顶）。
+      produces:
+      - application/json
+      responses:
+        "200":
+          description: OK
+          schema:
+            items:
+              $ref: '#/definitions/util.Region'
+            type: array
+      summary: 获取支持的地区列表
+      tags:
+      - image
 securityDefinitions:
   BearerAuth:
     in: header

internal/bootstrap/bootstrap.go

@@ -6,6 +6,7 @@ import (
 	"fmt"
 	"log"
 	"os"
+	"strings"
 
 	"BingPaper/internal/config"
 	"BingPaper/internal/cron"
@@ -52,10 +53,11 @@ func Init(webFS embed.FS, configPath string) *gin.Engine {
 
 	// 输出配置信息
 	util.Logger.Info("Application configuration loaded")
-	util.Logger.Info("├─ Config file", zap.String("path", config.GetRawViper().ConfigFileUsed()))
-	util.Logger.Info("├─ Database   ", zap.String("type", cfg.DB.Type))
-	util.Logger.Info("├─ Storage    ", zap.String("type", cfg.Storage.Type))
-	util.Logger.Info("└─ Server     ", zap.Int("port", cfg.Server.Port))
+	util.Logger.Info("├─ Config file ", zap.String("path", config.GetRawViper().ConfigFileUsed()))
+	util.Logger.Info("├─ Database    ", zap.String("type", cfg.DB.Type))
+	util.Logger.Info("├─ Storage     ", zap.String("type", cfg.Storage.Type))
+	util.Logger.Info("├─ Server      ", zap.Int("port", cfg.Server.Port))
+	util.Logger.Info("└─ Active Mkt  ", zap.Strings("regions", cfg.Fetcher.Regions))
 
 	// 根据存储类型输出更多信息
 	switch cfg.Storage.Type {
@@ -147,5 +149,6 @@ func LogWelcomeInfo() {
 	fmt.Printf("  - 管理后台:   %s/admin\n", baseURL)
 	fmt.Printf("  - API 文档:   %s/swagger/index.html\n", baseURL)
 	fmt.Printf("  - 今日图片:   %s/api/v1/image/today\n", baseURL)
+	fmt.Printf("  - 激活地区:   %s\n", strings.Join(cfg.Fetcher.Regions, ", "))
 	fmt.Println("---------------------------------------------------------")
 }

internal/config/config.go

@@ -11,6 +11,8 @@ import (
 	"github.com/fsnotify/fsnotify"
 	"github.com/spf13/viper"
 	"gopkg.in/yaml.v3"
+
+	"BingPaper/internal/util"
 )
 
 type Config struct {
@@ -25,6 +27,7 @@ type Config struct {
 	Token     TokenConfig     `mapstructure:"token" yaml:"token"`
 	Feature   FeatureConfig   `mapstructure:"feature" yaml:"feature"`
 	Web       WebConfig       `mapstructure:"web" yaml:"web"`
+	Fetcher   FetcherConfig   `mapstructure:"fetcher" yaml:"fetcher"`
 }
 
 type ServerConfig struct {
@@ -57,7 +60,9 @@ func (c LogConfig) GetShowDBLog() bool    { return c.ShowDBLog }
 func (c LogConfig) GetDBLogLevel() string { return c.DBLogLevel }
 
 type APIConfig struct {
-	Mode string `mapstructure:"mode" yaml:"mode"` // local | redirect
+	Mode                string `mapstructure:"mode" yaml:"mode"`                                     // local | redirect
+	EnableMktFallback   bool   `mapstructure:"enable_mkt_fallback" yaml:"enable_mkt_fallback"`       // 当请求的地区不存在时，是否回退到默认地区
+	EnableOnDemandFetch bool   `mapstructure:"enable_on_demand_fetch" yaml:"enable_on_demand_fetch"` // 是否启用按需抓取
 }
 
 type CronConfig struct {
@@ -118,6 +123,10 @@ type WebConfig struct {
 	Path string `mapstructure:"path" yaml:"path"`
 }
 
+type FetcherConfig struct {
+	Regions []string `mapstructure:"regions" yaml:"regions"`
+}
+
 // Bing 默认配置 (内置)
 const (
 	BingMkt     = "zh-CN"
@@ -156,7 +165,9 @@ func Init(configPath string) error {
 	v.SetDefault("log.log_console", true)
 	v.SetDefault("log.show_db_log", false)
 	v.SetDefault("log.db_log_level", "info")
-	v.SetDefault("api.mode", "local")
+	v.SetDefault("api.mode", "redirect")
+	v.SetDefault("api.enable_mkt_fallback", false)
+	v.SetDefault("api.enable_on_demand_fetch", false)
 	v.SetDefault("cron.enabled", true)
 	v.SetDefault("cron.daily_spec", "20 8-23/4 * * *")
 	v.SetDefault("retention.days", 0)
@@ -167,6 +178,13 @@ func Init(configPath string) error {
 	v.SetDefault("token.default_ttl", "168h")
 	v.SetDefault("feature.write_daily_files", true)
 	v.SetDefault("web.path", "web")
+
+	// 默认抓取所有支持的地区
+	var defaultRegions []string
+	for _, r := range util.AllRegions {
+		defaultRegions = append(defaultRegions, r.Value)
+	}
+	v.SetDefault("fetcher.regions", defaultRegions)
 	v.SetDefault("admin.password_bcrypt", "$2a$10$fYHPeWHmwObephJvtlyH1O8DIgaLk5TINbi9BOezo2M8cSjmJchka") // 默认密码: admin123
 
 	// 绑定环境变量
@@ -311,3 +329,11 @@ func GetTokenTTL() time.Duration {
 	}
 	return ttl
 }
+
+// GetDefaultMkt 返回生效的默认地区编码
+func (c *Config) GetDefaultMkt() string {
+	if len(c.Fetcher.Regions) > 0 {
+		return c.Fetcher.Regions[0]
+	}
+	return BingMkt
+}

internal/http/handlers/image.go

@@ -6,6 +6,7 @@ import (
 	"io"
 	"net/http"
 	"strconv"
+	"strings"
 
 	"BingPaper/internal/config"
 	"BingPaper/internal/model"
@@ -27,6 +28,7 @@ type ImageVariantResp struct {
 
 type ImageMetaResp struct {
 	Date          string             `json:"date"`
+	Mkt           string             `json:"mkt"`
 	Title         string             `json:"title"`
 	Copyright     string             `json:"copyright"`
 	CopyrightLink string             `json:"copyrightlink"`
@@ -41,15 +43,23 @@ type ImageMetaResp struct {
 // @Summary 获取今日图片
 // @Description 根据参数返回今日必应图片流或重定向
 // @Tags image
+// @Param mkt query string false "地区编码 (如 zh-CN, en-US)"
 // @Param variant query string false "分辨率 (UHD, 1920x1080, 1366x768, 1280x720, 1024x768, 800x600, 800x480, 640x480, 640x360, 480x360, 400x240, 320x240)" default(UHD)
 // @Param format query string false "格式 (jpg)" default(jpg)
 // @Produce image/jpeg
 // @Success 200 {file} binary
+// @Success 202 {object} map[string]string "按需抓取任务已启动"
+// @Failure 404 {object} map[string]string "图片未找到，响应体包含具体原因"
 // @Router /image/today [get]
 func GetToday(c *gin.Context) {
-	img, err := image.GetTodayImage()
+	mkt := c.Query("mkt")
+	img, err := image.GetTodayImage(mkt)
+	if err == image.ErrFetchStarted {
+		c.JSON(http.StatusAccepted, gin.H{"message": fmt.Sprintf("On-demand fetch started for region [%s]. Please try again later.", mkt)})
+		return
+	}
 	if err != nil {
-		c.JSON(http.StatusNotFound, gin.H{"error": "not found"})
+		sendImageNotFound(c, mkt)
 		return
 	}
 	handleImageResponse(c, img, 7200) // 2小时
@@ -59,13 +69,21 @@ func GetToday(c *gin.Context) {
 // @Summary 获取今日图片元数据
 // @Description 获取今日必应图片的标题、版权等元数据
 // @Tags image
+// @Param mkt query string false "地区编码 (如 zh-CN, en-US)"
 // @Produce json
 // @Success 200 {object} ImageMetaResp
+// @Success 202 {object} map[string]string "按需抓取任务已启动"
+// @Failure 404 {object} map[string]string "图片未找到，响应体包含具体原因"
 // @Router /image/today/meta [get]
 func GetTodayMeta(c *gin.Context) {
-	img, err := image.GetTodayImage()
+	mkt := c.Query("mkt")
+	img, err := image.GetTodayImage(mkt)
+	if err == image.ErrFetchStarted {
+		c.JSON(http.StatusAccepted, gin.H{"message": fmt.Sprintf("On-demand fetch started for region [%s]. Please try again later.", mkt)})
+		return
+	}
 	if err != nil {
-		c.JSON(http.StatusNotFound, gin.H{"error": "not found"})
+		sendImageNotFound(c, mkt)
 		return
 	}
 	c.Header("Cache-Control", "public, max-age=7200") // 2小时
@@ -76,15 +94,23 @@ func GetTodayMeta(c *gin.Context) {
 // @Summary 获取随机图片
 // @Description 随机返回一张已抓取的图片流或重定向
 // @Tags image
+// @Param mkt query string false "地区编码 (如 zh-CN, en-US)"
 // @Param variant query string false "分辨率" default(UHD)
 // @Param format query string false "格式" default(jpg)
 // @Produce image/jpeg
 // @Success 200 {file} binary
+// @Success 202 {object} map[string]string "按需抓取任务已启动"
+// @Failure 404 {object} map[string]string "图片未找到，响应体包含具体原因"
 // @Router /image/random [get]
 func GetRandom(c *gin.Context) {
-	img, err := image.GetRandomImage()
+	mkt := c.Query("mkt")
+	img, err := image.GetRandomImage(mkt)
+	if err == image.ErrFetchStarted {
+		c.JSON(http.StatusAccepted, gin.H{"message": fmt.Sprintf("On-demand fetch started for region [%s]. Please try again later.", mkt)})
+		return
+	}
 	if err != nil {
-		c.JSON(http.StatusNotFound, gin.H{"error": "not found"})
+		sendImageNotFound(c, mkt)
 		return
 	}
 	handleImageResponse(c, img, 0) // 禁用缓存
@@ -94,13 +120,21 @@ func GetRandom(c *gin.Context) {
 // @Summary 获取随机图片元数据
 // @Description 随机获取一张已抓取图片的元数据
 // @Tags image
+// @Param mkt query string false "地区编码 (如 zh-CN, en-US)"
 // @Produce json
 // @Success 200 {object} ImageMetaResp
+// @Success 202 {object} map[string]string "按需抓取任务已启动"
+// @Failure 404 {object} map[string]string "图片未找到，响应体包含具体原因"
 // @Router /image/random/meta [get]
 func GetRandomMeta(c *gin.Context) {
-	img, err := image.GetRandomImage()
+	mkt := c.Query("mkt")
+	img, err := image.GetRandomImage(mkt)
+	if err == image.ErrFetchStarted {
+		c.JSON(http.StatusAccepted, gin.H{"message": fmt.Sprintf("On-demand fetch started for region [%s]. Please try again later.", mkt)})
+		return
+	}
 	if err != nil {
-		c.JSON(http.StatusNotFound, gin.H{"error": "not found"})
+		sendImageNotFound(c, mkt)
 		return
 	}
 	c.Header("Cache-Control", "no-cache, no-store, must-revalidate")
@@ -112,16 +146,24 @@ func GetRandomMeta(c *gin.Context) {
 // @Description 根据日期返回图片流或重定向 (yyyy-mm-dd)
 // @Tags image
 // @Param date path string true "日期 (yyyy-mm-dd)"
+// @Param mkt query string false "地区编码 (如 zh-CN, en-US)"
 // @Param variant query string false "分辨率" default(UHD)
 // @Param format query string false "格式" default(jpg)
 // @Produce image/jpeg
 // @Success 200 {file} binary
+// @Success 202 {object} map[string]string "按需抓取任务已启动"
+// @Failure 404 {object} map[string]string "图片未找到，响应体包含具体原因"
 // @Router /image/date/{date} [get]
 func GetByDate(c *gin.Context) {
 	date := c.Param("date")
-	img, err := image.GetImageByDate(date)
+	mkt := c.Query("mkt")
+	img, err := image.GetImageByDate(date, mkt)
+	if err == image.ErrFetchStarted {
+		c.JSON(http.StatusAccepted, gin.H{"message": fmt.Sprintf("On-demand fetch started for region [%s]. Please try again later.", mkt)})
+		return
+	}
 	if err != nil {
-		c.JSON(http.StatusNotFound, gin.H{"error": "not found"})
+		sendImageNotFound(c, mkt)
 		return
 	}
 	handleImageResponse(c, img, 604800) // 7天
@@ -132,14 +174,22 @@ func GetByDate(c *gin.Context) {
 // @Description 根据日期获取图片元数据 (yyyy-mm-dd)
 // @Tags image
 // @Param date path string true "日期 (yyyy-mm-dd)"
+// @Param mkt query string false "地区编码 (如 zh-CN, en-US)"
 // @Produce json
 // @Success 200 {object} ImageMetaResp
+// @Success 202 {object} map[string]string "按需抓取任务已启动"
+// @Failure 404 {object} map[string]string "图片未找到，响应体包含具体原因"
 // @Router /image/date/{date}/meta [get]
 func GetByDateMeta(c *gin.Context) {
 	date := c.Param("date")
-	img, err := image.GetImageByDate(date)
+	mkt := c.Query("mkt")
+	img, err := image.GetImageByDate(date, mkt)
+	if err == image.ErrFetchStarted {
+		c.JSON(http.StatusAccepted, gin.H{"message": fmt.Sprintf("On-demand fetch started for region [%s]. Please try again later.", mkt)})
+		return
+	}
 	if err != nil {
-		c.JSON(http.StatusNotFound, gin.H{"error": "not found"})
+		sendImageNotFound(c, mkt)
 		return
 	}
 	c.Header("Cache-Control", "public, max-age=604800") // 7天
@@ -154,6 +204,7 @@ func GetByDateMeta(c *gin.Context) {
 // @Param page query int false "页码 (从1开始)"
 // @Param page_size query int false "每页数量"
 // @Param month query string false "按月份过滤 (格式: YYYY-MM)"
+// @Param mkt query string false "地区编码 (如 zh-CN, en-US)"
 // @Produce json
 // @Success 200 {array} ImageMetaResp
 // @Router /images [get]
@@ -162,10 +213,12 @@ func ListImages(c *gin.Context) {
 	pageStr := c.Query("page")
 	pageSizeStr := c.Query("page_size")
 	month := c.Query("month")
+	mkt := c.Query("mkt")
 
 	// 记录请求参数，便于排查过滤失效问题
 	util.Logger.Debug("ListImages parameters",
 		zap.String("month", month),
+		zap.String("mkt", mkt),
 		zap.String("page", pageStr),
 		zap.String("page_size", pageSizeStr),
 		zap.String("limit", limitStr))
@@ -192,7 +245,7 @@ func ListImages(c *gin.Context) {
 		offset = 0
 	}
 
-	images, err := image.GetImageList(limit, offset, month)
+	images, err := image.GetImageList(limit, offset, month, mkt)
 	if err != nil {
 		util.Logger.Error("ListImages service call failed", zap.Error(err))
 		c.JSON(http.StatusInternalServerError, gin.H{"error": err.Error()})
@@ -201,11 +254,60 @@ func ListImages(c *gin.Context) {
 
 	result := []gin.H{}
 	for _, img := range images {
-		result = append(result, formatMeta(&img))
+		result = append(result, formatMetaSummary(&img))
 	}
 	c.JSON(http.StatusOK, result)
 }
 
+// ListGlobalTodayImages 获取所有地区的今日图片列表
+// @Summary 获取所有地区的今日图片列表
+// @Description 获取配置文件中所有已开启地区的今日必应图片元数据（缩略图）
+// @Tags image
+// @Produce json
+// @Success 200 {array} ImageMetaResp
+// @Router /images/global/today [get]
+func ListGlobalTodayImages(c *gin.Context) {
+	images, err := image.GetAllRegionsTodayImages()
+	if err != nil {
+		util.Logger.Error("ListGlobalTodayImages service call failed", zap.Error(err))
+		c.JSON(http.StatusInternalServerError, gin.H{"error": err.Error()})
+		return
+	}
+
+	result := []gin.H{}
+	for _, img := range images {
+		result = append(result, formatMetaSummary(&img))
+	}
+	c.JSON(http.StatusOK, result)
+}
+
+func sendImageNotFound(c *gin.Context, mkt string) {
+	cfg := config.GetConfig().API
+	message := "image not found"
+
+	if mkt != "" {
+		reasons := []string{}
+		if !util.IsValidRegion(mkt) {
+			reasons = append(reasons, fmt.Sprintf("[%s] is not a standard region code", mkt))
+		} else {
+			if !cfg.EnableOnDemandFetch {
+				reasons = append(reasons, "on-demand fetch is disabled")
+			}
+			if !cfg.EnableMktFallback {
+				reasons = append(reasons, "region fallback is disabled")
+			}
+		}
+
+		if len(reasons) > 0 {
+			message = fmt.Sprintf("Image not found for region [%s]. Reasons: %s.", mkt, strings.Join(reasons, ", "))
+		} else {
+			message = fmt.Sprintf("Image not found for region [%s] even after on-demand fetch and fallback attempts.", mkt)
+		}
+	}
+
+	c.JSON(http.StatusNotFound, gin.H{"error": message})
+}
+
 func handleImageResponse(c *gin.Context, img *model.Image, maxAge int) {
 	variant := c.DefaultQuery("variant", "UHD")
 	format := c.DefaultQuery("format", "jpg")
@@ -283,6 +385,49 @@ func serveLocal(c *gin.Context, key string, etag string, maxAge int) {
 	io.Copy(c.Writer, reader)
 }
 
+func formatMetaSummary(img *model.Image) gin.H {
+	cfg := config.GetConfig()
+
+	// 找到最小的变体（Size 最小）
+	var smallest *model.ImageVariant
+	for i := range img.Variants {
+		v := &img.Variants[i]
+		if smallest == nil || v.Size < smallest.Size {
+			smallest = v
+		}
+	}
+
+	variants := []gin.H{}
+	if smallest != nil {
+		url := smallest.PublicURL
+		if url == "" && cfg.API.Mode == "redirect" && img.URLBase != "" {
+			url = fmt.Sprintf("https://www.bing.com%s_%s.jpg", img.URLBase, smallest.Variant)
+		} else if cfg.API.Mode == "local" || url == "" {
+			url = fmt.Sprintf("%s/api/v1/image/date/%s?variant=%s&format=%s&mkt=%s", cfg.Server.BaseURL, img.Date, smallest.Variant, smallest.Format, img.Mkt)
+		}
+		variants = append(variants, gin.H{
+			"variant":     smallest.Variant,
+			"format":      smallest.Format,
+			"size":        smallest.Size,
+			"url":         url,
+			"storage_key": smallest.StorageKey,
+		})
+	}
+
+	return gin.H{
+		"date":          img.Date,
+		"mkt":           img.Mkt,
+		"title":         img.Title,
+		"copyright":     img.Copyright,
+		"copyrightlink": img.CopyrightLink,
+		"quiz":          img.Quiz,
+		"startdate":     img.StartDate,
+		"fullstartdate": img.FullStartDate,
+		"hsh":           img.HSH,
+		"variants":      variants,
+	}
+}
+
 func formatMeta(img *model.Image) gin.H {
 	cfg := config.GetConfig()
 	variants := []gin.H{}
@@ -291,7 +436,7 @@ func formatMeta(img *model.Image) gin.H {
 		if url == "" && cfg.API.Mode == "redirect" && img.URLBase != "" {
 			url = fmt.Sprintf("https://www.bing.com%s_%s.jpg", img.URLBase, v.Variant)
 		} else if cfg.API.Mode == "local" || url == "" {
-			url = fmt.Sprintf("%s/api/v1/image/date/%s?variant=%s&format=%s", cfg.Server.BaseURL, img.Date, v.Variant, v.Format)
+			url = fmt.Sprintf("%s/api/v1/image/date/%s?variant=%s&format=%s&mkt=%s", cfg.Server.BaseURL, img.Date, v.Variant, v.Format, img.Mkt)
 		}
 		variants = append(variants, gin.H{
 			"variant":     v.Variant,
@@ -304,6 +449,7 @@ func formatMeta(img *model.Image) gin.H {
 
 	return gin.H{
 		"date":          img.Date,
+		"mkt":           img.Mkt,
 		"title":         img.Title,
 		"copyright":     img.Copyright,
 		"copyrightlink": img.CopyrightLink,
@@ -314,3 +460,63 @@ func formatMeta(img *model.Image) gin.H {
 		"variants":      variants,
 	}
 }
+
+// GetRegions 获取支持的地区列表
+// @Summary 获取支持的地区列表
+// @Description 返回系统支持的所有必应地区编码及标签。如果配置中指定了抓取地区，这些地区将排在列表最前面（置顶）。
+// @Tags image
+// @Produce json
+// @Success 200 {array} util.Region
+// @Router /regions [get]
+func GetRegions(c *gin.Context) {
+	cfg := config.GetConfig()
+	pinned := cfg.Fetcher.Regions
+
+	if len(pinned) == 0 {
+		// 如果没有配置抓取地区，返回所有支持的地区
+		c.JSON(http.StatusOK, util.AllRegions)
+		return
+	}
+
+	// 创建一个 Map 用于快速查找配置的地区
+	pinnedMap := make(map[string]bool)
+	for _, v := range pinned {
+		pinnedMap[v] = true
+	}
+
+	// 只返回配置中的地区，并保持配置中的顺序
+	var result []util.Region
+	// 为了保持配置顺序，我们遍历 pinned 而不是 AllRegions
+	for _, pVal := range pinned {
+		for _, r := range util.AllRegions {
+			if r.Value == pVal {
+				result = append(result, r)
+				break
+			}
+		}
+	}
+
+	// 如果配置了一些不在 AllRegions 里的 mkt，上述循环可能漏掉
+	// 但根据之前的逻辑，AllRegions 是已知的 17 个地区。
+	// 如果用户配置了 fr-CA (不在 17 个内)，我们也应该返回它吗？
+	// 需求说 "前端页面对地区进行约束"，如果配置了，前端就该显示。
+	// 如果不在 AllRegions 里的，我们直接返回原始编码作为 label 或者查找一下。
+
+	if len(result) < len(pinned) {
+		// 补全不在 AllRegions 里的地区
+		for _, pVal := range pinned {
+			found := false
+			for _, r := range result {
+				if r.Value == pVal {
+					found = true
+					break
+				}
+			}
+			if !found {
+				result = append(result, util.Region{Value: pVal, Label: pVal})
+			}
+		}
+	}
+
+	c.JSON(http.StatusOK, result)
+}

internal/http/handlers/image_test.go

@@ -1,6 +1,7 @@
 package handlers
 
 import (
+	"encoding/json"
 	"net/http"
 	"net/http/httptest"
 	"testing"
@@ -65,4 +66,43 @@ func TestHandleImageResponseRedirect(t *testing.T) {
 		assert.Contains(t, variants[0]["url"].(string), "myserver.com")
 		assert.Contains(t, variants[0]["url"].(string), "/api/v1/image/date/")
 	})
+
+	t.Run("FormatMetaSummary should only return the smallest variant", func(t *testing.T) {
+		imgWithMultipleVariants := &model.Image{
+			Date: "2026-01-26",
+			Variants: []model.ImageVariant{
+				{Variant: "UHD", Size: 1000, Format: "jpg"},
+				{Variant: "640x480", Size: 200, Format: "jpg"},
+				{Variant: "1920x1080", Size: 500, Format: "jpg"},
+			},
+		}
+		meta := formatMetaSummary(imgWithMultipleVariants)
+		variants := meta["variants"].([]gin.H)
+		assert.Equal(t, 1, len(variants))
+		assert.Equal(t, "640x480", variants[0]["variant"])
+	})
+}
+
+func TestGetRegions(t *testing.T) {
+	gin.SetMode(gin.TestMode)
+
+	t.Run("GetRegions should respect pinned order", func(t *testing.T) {
+		// Setup config with custom pinned regions
+		config.Init("")
+		config.GetConfig().Fetcher.Regions = []string{"en-US", "ja-JP"}
+
+		w := httptest.NewRecorder()
+		c, _ := gin.CreateTestContext(w)
+		GetRegions(c)
+
+		assert.Equal(t, http.StatusOK, w.Code)
+
+		var regions []map[string]string
+		err := json.Unmarshal(w.Body.Bytes(), &regions)
+		assert.NoError(t, err)
+
+		assert.GreaterOrEqual(t, len(regions), 2)
+		assert.Equal(t, "en-US", regions[0]["value"])
+		assert.Equal(t, "ja-JP", regions[1]["value"])
+	})
 }

internal/http/router.go

@@ -47,6 +47,8 @@ func SetupRouter(webFS embed.FS) *gin.Engine {
 			img.GET("/date/:date/meta", handlers.GetByDateMeta)
 		}
 		api.GET("/images", handlers.ListImages)
+		api.GET("/images/global/today", handlers.ListGlobalTodayImages)
+		api.GET("/regions", handlers.GetRegions)
 
 		// 管理接口
 		admin := api.Group("/admin")

internal/model/models.go

@@ -8,7 +8,8 @@ import (
 
 type Image struct {
 	ID            uint           `gorm:"primaryKey" json:"id"`
-	Date          string         `gorm:"uniqueIndex;type:varchar(10)" json:"date"` // YYYY-MM-DD
+	Date          string         `gorm:"uniqueIndex:idx_date_mkt;index:idx_mkt_date,priority:2;type:varchar(10)" json:"date"` // YYYY-MM-DD
+	Mkt           string         `gorm:"uniqueIndex:idx_date_mkt;index:idx_mkt_date,priority:1;type:varchar(10)" json:"mkt"`  // zh-CN, en-US etc.
 	Title         string         `json:"title"`
 	Copyright     string         `json:"copyright"`
 	CopyrightLink string         `json:"copyrightlink"`

internal/service/fetcher/fetcher.go

@@ -11,6 +11,7 @@ import (
 	"net/http"
 	"os"
 	"path/filepath"
+	"strings"
 	"time"
 
 	"BingPaper/internal/config"
@@ -55,7 +56,44 @@ func NewFetcher() *Fetcher {
 
 func (f *Fetcher) Fetch(ctx context.Context, n int) error {
 	util.Logger.Info("Starting fetch task", zap.Int("n", n))
-	url := fmt.Sprintf("%s?format=js&idx=0&n=%d&uhd=1&mkt=%s", config.BingAPIBase, n, config.BingMkt)
+	regions := config.GetConfig().Fetcher.Regions
+	if len(regions) == 0 {
+		regions = []string{config.GetConfig().GetDefaultMkt()}
+	}
+
+	for _, mkt := range regions {
+		if err := f.FetchRegion(ctx, mkt); err != nil {
+			util.Logger.Error("Failed to fetch region images", zap.String("mkt", mkt), zap.Error(err))
+		}
+	}
+
+	util.Logger.Info("Fetch task completed")
+	return nil
+}
+
+// FetchRegion 抓取指定地区的图片
+func (f *Fetcher) FetchRegion(ctx context.Context, mkt string) error {
+	if !util.IsValidRegion(mkt) {
+		util.Logger.Warn("Skipping fetch for invalid region", zap.String("mkt", mkt))
+		return fmt.Errorf("invalid region code: %s", mkt)
+	}
+	util.Logger.Info("Fetching images for region", zap.String("mkt", mkt))
+	// 调用两次 API 获取最多两周的数据
+	// 第一次 idx=0&n=8 (今天起往回数 8 张)
+	if err := f.fetchByMkt(ctx, mkt, 0, 8); err != nil {
+		util.Logger.Error("Failed to fetch images", zap.String("mkt", mkt), zap.Int("idx", 0), zap.Error(err))
+		return err
+	}
+	// 第二次 idx=7&n=8 (7天前起往回数 8 张，与第一次有重叠，确保不漏)
+	if err := f.fetchByMkt(ctx, mkt, 7, 8); err != nil {
+		util.Logger.Error("Failed to fetch images", zap.String("mkt", mkt), zap.Int("idx", 7), zap.Error(err))
+		// 第二次失败不一定返回错误，因为可能第一次已经拿到了
+	}
+	return nil
+}
+
+func (f *Fetcher) fetchByMkt(ctx context.Context, mkt string, idx int, n int) error {
+	url := fmt.Sprintf("%s?format=js&idx=%d&n=%d&uhd=1&mkt=%s", config.BingAPIBase, idx, n, mkt)
 	util.Logger.Debug("Requesting Bing API", zap.String("url", url))
 	resp, err := f.httpClient.Get(url)
 	if err != nil {
@@ -70,49 +108,34 @@ func (f *Fetcher) Fetch(ctx context.Context, n int) error {
 		return err
 	}
 
-	util.Logger.Info("Fetched images from Bing", zap.Int("count", len(bingResp.Images)))
+	util.Logger.Info("Fetched images from Bing", zap.String("mkt", mkt), zap.Int("count", len(bingResp.Images)))
 
 	for _, bingImg := range bingResp.Images {
-		if err := f.processImage(ctx, bingImg); err != nil {
-			util.Logger.Error("Failed to process image", zap.String("date", bingImg.Enddate), zap.Error(err))
+		if err := f.processImage(ctx, bingImg, mkt); err != nil {
+			util.Logger.Error("Failed to process image", zap.String("date", bingImg.Enddate), zap.String("mkt", mkt), zap.Error(err))
 		}
 	}
 
-	util.Logger.Info("Fetch task completed")
 	return nil
 }
 
-func (f *Fetcher) processImage(ctx context.Context, bingImg BingImage) error {
+func (f *Fetcher) processImage(ctx context.Context, bingImg BingImage, mkt string) error {
 	dateStr := fmt.Sprintf("%s-%s-%s", bingImg.Enddate[0:4], bingImg.Enddate[4:6], bingImg.Enddate[6:8])
 
 	// 幂等检查
 	var existing model.Image
-	if err := repo.DB.Where("date = ?", dateStr).First(&existing).Error; err == nil {
-		util.Logger.Info("Image already exists, skipping", zap.String("date", dateStr))
+	if err := repo.DB.Where("date = ? AND mkt = ?", dateStr, mkt).First(&existing).Error; err == nil {
+		util.Logger.Debug("Image already exists in DB, skipping", zap.String("date", dateStr), zap.String("mkt", mkt))
 		return nil
 	}
 
-	util.Logger.Info("Processing new image", zap.String("date", dateStr), zap.String("title", bingImg.Title))
-
-	// UHD 探测
-	imgURL, variantName := f.probeUHD(bingImg.URLBase)
-
-	imgData, err := f.downloadImage(imgURL)
-	if err != nil {
-		util.Logger.Error("Failed to download image", zap.String("url", imgURL), zap.Error(err))
-		return err
-	}
-
-	// 解码图片用于缩放
-	srcImg, _, err := image.Decode(bytes.NewReader(imgData))
-	if err != nil {
-		util.Logger.Error("Failed to decode image data", zap.Error(err))
-		return err
-	}
+	imageName := f.extractImageName(bingImg.URLBase, bingImg.HSH)
+	util.Logger.Info("Processing image", zap.String("date", dateStr), zap.String("mkt", mkt), zap.String("imageName", imageName))
 
 	// 创建 DB 记录
 	dbImg := model.Image{
 		Date:          dateStr,
+		Mkt:           mkt,
 		Title:         bingImg.Title,
 		Copyright:     bingImg.Copyright,
 		CopyrightLink: bingImg.CopyrightLink,
@@ -124,23 +147,25 @@ func (f *Fetcher) processImage(ctx context.Context, bingImg BingImage) error {
 	}
 
 	if err := repo.DB.Clauses(clause.OnConflict{
-		Columns:   []clause.Column{{Name: "date"}},
+		Columns:   []clause.Column{{Name: "date"}, {Name: "mkt"}},
 		DoNothing: true,
 	}).Create(&dbImg).Error; err != nil {
 		util.Logger.Error("Failed to create image record", zap.Error(err))
 		return err
 	}
 
-	// 再次检查 dbImg.ID 是否被填充，如果没有被填充（说明由于冲突未插入），则需要查询出已有的 ID
 	if dbImg.ID == 0 {
 		var existing model.Image
-		if err := repo.DB.Where("date = ?", dateStr).First(&existing).Error; err != nil {
+		if err := repo.DB.Where("date = ? AND mkt = ?", dateStr, mkt).First(&existing).Error; err != nil {
 			util.Logger.Error("Failed to query existing image record after conflict", zap.Error(err))
 			return err
 		}
 		dbImg = existing
 	}
 
+	// UHD 探测
+	imgURL, variantName := f.probeUHD(bingImg.URLBase)
+
 	// 保存各种分辨率
 	targetVariants := []struct {
 		name   string
@@ -160,40 +185,105 @@ func (f *Fetcher) processImage(ctx context.Context, bingImg BingImage) error {
 		{"320x240", 320, 240},
 	}
 
-	// 首先保存原图 (UHD 或 1080p)
-	if err := f.saveVariant(ctx, &dbImg, variantName, "jpg", imgData); err != nil {
-		util.Logger.Error("Failed to save original variant", zap.String("variant", variantName), zap.Error(err))
-	}
-
-	for _, v := range targetVariants {
-		// 如果目标分辨率就是原图分辨率，则跳过（已经保存过了）
-		if v.name == variantName {
-			continue
-		}
-
-		resized := imaging.Fill(srcImg, v.width, v.height, imaging.Center, imaging.Lanczos)
-		buf := new(bytes.Buffer)
-		if err := jpeg.Encode(buf, resized, &jpeg.Options{Quality: 100}); err != nil {
-			util.Logger.Warn("Failed to encode jpeg", zap.String("variant", v.name), zap.Error(err))
-			continue
-		}
-		currentImgData := buf.Bytes()
-
-		// 保存 JPG
-		if err := f.saveVariant(ctx, &dbImg, v.name, "jpg", currentImgData); err != nil {
-			util.Logger.Error("Failed to save variant", zap.String("variant", v.name), zap.Error(err))
+	// 检查是否所有变体都已存在于存储中
+	allExist := true
+	// 检查 UHD/原图
+	uhdKey := f.generateKey(imageName, variantName, "jpg")
+	exists, _ := storage.GlobalStorage.Exists(ctx, uhdKey)
+	if !exists {
+		allExist = false
+	} else {
+		for _, v := range targetVariants {
+			if v.name == variantName {
+				continue
+			}
+			vKey := f.generateKey(imageName, v.name, "jpg")
+			exists, _ := storage.GlobalStorage.Exists(ctx, vKey)
+			if !exists {
+				allExist = false
+				break
+			}
 		}
 	}
 
-	// 保存今日额外文件
-	today := time.Now().Format("2006-01-02")
-	if dateStr == today && config.GetConfig().Feature.WriteDailyFiles {
-		f.saveDailyFiles(srcImg, imgData)
+	if allExist {
+		util.Logger.Debug("All image variants exist in storage, linking only", zap.String("imageName", imageName))
+		// 只建立关联信息
+		f.saveVariant(ctx, &dbImg, imageName, variantName, "jpg", nil)
+		for _, v := range targetVariants {
+			if v.name == variantName {
+				continue
+			}
+			f.saveVariant(ctx, &dbImg, imageName, v.name, "jpg", nil)
+		}
+	} else {
+		// 需要下载并处理
+		util.Logger.Debug("Downloading and processing image", zap.String("url", imgURL))
+		imgData, err := f.downloadImage(imgURL)
+		if err != nil {
+			util.Logger.Error("Failed to download image", zap.String("url", imgURL), zap.Error(err))
+			return err
+		}
+
+		srcImg, _, err := image.Decode(bytes.NewReader(imgData))
+		if err != nil {
+			util.Logger.Error("Failed to decode image data", zap.Error(err))
+			return err
+		}
+
+		// 保存原图
+		if err := f.saveVariant(ctx, &dbImg, imageName, variantName, "jpg", imgData); err != nil {
+			util.Logger.Error("Failed to save original variant", zap.String("variant", variantName), zap.Error(err))
+		}
+
+		for _, v := range targetVariants {
+			if v.name == variantName {
+				continue
+			}
+			resized := imaging.Fill(srcImg, v.width, v.height, imaging.Center, imaging.Lanczos)
+			buf := new(bytes.Buffer)
+			if err := jpeg.Encode(buf, resized, &jpeg.Options{Quality: 100}); err != nil {
+				util.Logger.Warn("Failed to encode jpeg", zap.String("variant", v.name), zap.Error(err))
+				continue
+			}
+			currentImgData := buf.Bytes()
+			if err := f.saveVariant(ctx, &dbImg, imageName, v.name, "jpg", currentImgData); err != nil {
+				util.Logger.Error("Failed to save variant", zap.String("variant", v.name), zap.Error(err))
+			}
+		}
+
+		// 保存今日额外文件
+		today := time.Now().Format("2006-01-02")
+		if dateStr == today && config.GetConfig().Feature.WriteDailyFiles {
+			f.saveDailyFiles(srcImg, imgData, mkt)
+		}
 	}
 
 	return nil
 }
 
+func (f *Fetcher) extractImageName(urlBase, hsh string) string {
+	// 示例: /th?id=OHR.MilwaukeeHall_ROW0871854348
+	start := 0
+	if idx := strings.Index(urlBase, "OHR."); idx != -1 {
+		start = idx + 4
+	} else if idx := strings.Index(urlBase, "id="); idx != -1 {
+		start = idx + 3
+	}
+
+	rem := urlBase[start:]
+	end := strings.Index(rem, "_")
+	if end == -1 {
+		end = len(rem)
+	}
+
+	name := rem[:end]
+	if name == "" {
+		return hsh
+	}
+	return name
+}
+
 func (f *Fetcher) probeUHD(urlBase string) (string, string) {
 	uhdURL := fmt.Sprintf("https://www.bing.com%s_UHD.jpg", urlBase)
 	resp, err := f.httpClient.Head(uhdURL)
@@ -212,25 +302,52 @@ func (f *Fetcher) downloadImage(url string) ([]byte, error) {
 	return io.ReadAll(resp.Body)
 }
 
-func (f *Fetcher) saveVariant(ctx context.Context, img *model.Image, variant, format string, data []byte) error {
-	key := fmt.Sprintf("%s/%s_%s.%s", img.Date, img.Date, variant, format)
+func (f *Fetcher) generateKey(imageName, variant, format string) string {
+	return fmt.Sprintf("%s/%s_%s.%s", imageName, imageName, variant, format)
+}
+
+func (f *Fetcher) saveVariant(ctx context.Context, img *model.Image, imageName, variant, format string, data []byte) error {
+	key := f.generateKey(imageName, variant, format)
 	contentType := "image/jpeg"
 	if format == "webp" {
 		contentType = "image/webp"
 	}
 
-	stored, err := storage.GlobalStorage.Put(ctx, key, bytes.NewReader(data), contentType)
-	if err != nil {
-		return err
+	var size int64
+	var publicURL string
+
+	exists, _ := storage.GlobalStorage.Exists(ctx, key)
+	if exists {
+		util.Logger.Debug("Variant already exists in storage, linking", zap.String("key", key))
+		// 如果存在，我们需要获取它的大小和公共 URL (如果可能)
+		// 但目前的 Storage 接口没有 Stat，我们可以尝试 Get 或者干脆 size 为 0
+		// 为了简单，我们只从存储中获取公共 URL
+		if pURL, ok := storage.GlobalStorage.PublicURL(key); ok {
+			publicURL = pURL
+		}
+		// size 暂时设为 0 或者从 data 中取 (如果有的话)
+		if data != nil {
+			size = int64(len(data))
+		}
+	} else if data != nil {
+		util.Logger.Debug("Saving variant to storage", zap.String("key", key))
+		stored, err := storage.GlobalStorage.Put(ctx, key, bytes.NewReader(data), contentType)
+		if err != nil {
+			return err
+		}
+		publicURL = stored.PublicURL
+		size = stored.Size
+	} else {
+		return fmt.Errorf("variant %s does not exist and no data provided", key)
 	}
 
 	vRecord := model.ImageVariant{
 		ImageID:    img.ID,
 		Variant:    variant,
 		Format:     format,
-		StorageKey: stored.Key,
-		PublicURL:  stored.PublicURL,
-		Size:       int64(len(data)),
+		StorageKey: key,
+		PublicURL:  publicURL,
+		Size:       size,
 	}
 
 	return repo.DB.Clauses(clause.OnConflict{
@@ -239,20 +356,21 @@ func (f *Fetcher) saveVariant(ctx context.Context, img *model.Image, variant, fo
 	}).Create(&vRecord).Error
 }
 
-func (f *Fetcher) saveDailyFiles(srcImg image.Image, originalData []byte) {
-	util.Logger.Info("Saving daily files")
+func (f *Fetcher) saveDailyFiles(srcImg image.Image, originalData []byte, mkt string) {
+	util.Logger.Info("Saving daily files", zap.String("mkt", mkt))
 	localRoot := config.GetConfig().Storage.Local.Root
 	if localRoot == "" {
 		localRoot = "data"
 	}
 
-	if err := os.MkdirAll(localRoot, 0755); err != nil {
-		util.Logger.Error("Failed to create directory", zap.String("path", localRoot), zap.Error(err))
+	mktDir := filepath.Join(localRoot, mkt)
+	if err := os.MkdirAll(mktDir, 0755); err != nil {
+		util.Logger.Error("Failed to create directory", zap.String("path", mktDir), zap.Error(err))
 		return
 	}
 
 	// daily.jpeg (quality 100)
-	jpegPath := filepath.Join(localRoot, "daily.jpeg")
+	jpegPath := filepath.Join(mktDir, "daily.jpeg")
 	fJpeg, err := os.Create(jpegPath)
 	if err != nil {
 		util.Logger.Error("Failed to create daily.jpeg", zap.Error(err))
@@ -262,8 +380,21 @@ func (f *Fetcher) saveDailyFiles(srcImg image.Image, originalData []byte) {
 	}
 
 	// original.jpeg (quality 100)
-	originalPath := filepath.Join(localRoot, "original.jpeg")
+	originalPath := filepath.Join(mktDir, "original.jpeg")
 	if err := os.WriteFile(originalPath, originalData, 0644); err != nil {
 		util.Logger.Error("Failed to write original.jpeg", zap.Error(err))
 	}
+
+	// 同时也保留一份在根目录下（兼容旧逻辑，且作为默认地区图片）
+	// 如果是默认地区或者是第一个抓取的地区，可以覆盖根目录的文件
+	if mkt == config.GetConfig().GetDefaultMkt() {
+		jpegPathRoot := filepath.Join(localRoot, "daily.jpeg")
+		fJpegRoot, err := os.Create(jpegPathRoot)
+		if err == nil {
+			jpeg.Encode(fJpegRoot, srcImg, &jpeg.Options{Quality: 100})
+			fJpegRoot.Close()
+		}
+		originalPathRoot := filepath.Join(localRoot, "original.jpeg")
+		os.WriteFile(originalPathRoot, originalData, 0644)
+	}
 }

internal/service/image/image_service.go

@@ -2,18 +2,23 @@ package image
 
 import (
 	"context"
+	"errors"
 	"fmt"
+	"math/rand"
 	"time"
 
 	"BingPaper/internal/config"
 	"BingPaper/internal/model"
 	"BingPaper/internal/repo"
+	"BingPaper/internal/service/fetcher"
 	"BingPaper/internal/storage"
 	"BingPaper/internal/util"
 
 	"go.uber.org/zap"
 )
 
+var ErrFetchStarted = errors.New("on-demand fetch started")
+
 func CleanupOldImages(ctx context.Context) error {
 	days := config.GetConfig().Retention.Days
 	if days <= 0 {
@@ -50,43 +55,155 @@ func CleanupOldImages(ctx context.Context) error {
 	return nil
 }
 
-func GetTodayImage() (*model.Image, error) {
+func GetTodayImage(mkt string) (*model.Image, error) {
 	today := time.Now().Format("2006-01-02")
+	util.Logger.Debug("Getting today image", zap.String("mkt", mkt), zap.String("today", today))
 	var img model.Image
-	err := repo.DB.Where("date = ?", today).Preload("Variants").First(&img).Error
+	tx := repo.DB.Where("date = ?", today)
+	if mkt != "" {
+		tx = tx.Where("mkt = ?", mkt)
+	}
+	err := tx.Preload("Variants").First(&img).Error
+	if err != nil && mkt != "" && config.GetConfig().API.EnableOnDemandFetch && util.IsValidRegion(mkt) {
+		// 如果没找到，尝试异步按需抓取该地区
+		util.Logger.Info("Image not found in DB, starting asynchronous on-demand fetch", zap.String("mkt", mkt))
+		f := fetcher.NewFetcher()
+		go func() {
+			_ = f.FetchRegion(context.Background(), mkt)
+		}()
+		return nil, ErrFetchStarted
+	}
+
 	if err != nil {
-		// 如果今天没有，尝试获取最近的一张
-		err = repo.DB.Order("date desc").Preload("Variants").First(&img).Error
+		util.Logger.Debug("Today image not found, trying latest image", zap.String("mkt", mkt))
+		// 如果今天还是没有，尝试获取最近的一张
+		tx = repo.DB.Order("date desc")
+		if mkt != "" {
+			tx = tx.Where("mkt = ?", mkt)
+		}
+		err = tx.Preload("Variants").First(&img).Error
+	}
+
+	// 兜底逻辑：如果指定地区没找到，且开启了兜底开关，则尝试获取默认地区的图片
+	if err != nil && mkt != "" && config.GetConfig().API.EnableMktFallback {
+		defaultMkt := config.GetConfig().GetDefaultMkt()
+		util.Logger.Debug("Image not found, trying fallback to default market", zap.String("mkt", mkt), zap.String("defaultMkt", defaultMkt))
+		if mkt != defaultMkt {
+			return GetTodayImage(defaultMkt)
+		}
+		return GetTodayImage("")
+	}
+
+	if err == nil {
+		util.Logger.Debug("Found image", zap.String("date", img.Date), zap.String("mkt", img.Mkt))
 	}
 	return &img, err
 }
 
-func GetRandomImage() (*model.Image, error) {
+func GetAllRegionsTodayImages() ([]model.Image, error) {
+	regions := config.GetConfig().Fetcher.Regions
+	if len(regions) == 0 {
+		regions = []string{config.GetConfig().GetDefaultMkt()}
+	}
+
+	var images []model.Image
+	for _, mkt := range regions {
+		img, err := GetTodayImage(mkt)
+		if err == nil {
+			images = append(images, *img)
+		}
+	}
+	return images, nil
+}
+
+func GetRandomImage(mkt string) (*model.Image, error) {
+	util.Logger.Debug("Getting random image", zap.String("mkt", mkt))
 	var img model.Image
 	// SQLite 使用 RANDOM(), MySQL/Postgres 使用 RANDOM() 或 RAND()
 	// 简单起见，先查总数再 Offset
 	var count int64
-	repo.DB.Model(&model.Image{}).Count(&count)
+	tx := repo.DB.Model(&model.Image{})
+	if mkt != "" {
+		tx = tx.Where("mkt = ?", mkt)
+	}
+	tx.Count(&count)
+	if count == 0 && mkt != "" && config.GetConfig().API.EnableOnDemandFetch && util.IsValidRegion(mkt) {
+		// 如果没找到，尝试异步按需抓取该地区
+		util.Logger.Info("No images found in DB for region, starting asynchronous on-demand fetch", zap.String("mkt", mkt))
+		f := fetcher.NewFetcher()
+		go func() {
+			_ = f.FetchRegion(context.Background(), mkt)
+		}()
+		return nil, ErrFetchStarted
+	}
+
 	if count == 0 {
 		return nil, fmt.Errorf("no images found")
 	}
 
-	// 这种方法不适合海量数据，但对于 30 天的数据没问题
-	err := repo.DB.Order("RANDOM()").Preload("Variants").First(&img).Error
-	if err != nil {
-		// 适配 MySQL
-		err = repo.DB.Order("RAND()").Preload("Variants").First(&img).Error
+	// 优化随机查询：使用 Offset 代替 ORDER BY RANDOM()
+	// 注意：tx 包含了前面的 Where 条件
+	offset := rand.Intn(int(count))
+	util.Logger.Debug("Random image selection", zap.Int64("total", count), zap.Int("offset", offset))
+	err := tx.Preload("Variants").Offset(offset).Limit(1).Find(&img).Error
+
+	// 兜底逻辑
+	if (err != nil || img.ID == 0) && mkt != "" && config.GetConfig().API.EnableMktFallback {
+		defaultMkt := config.GetConfig().GetDefaultMkt()
+		util.Logger.Debug("Random image not found, trying fallback", zap.String("mkt", mkt), zap.String("defaultMkt", defaultMkt))
+		if mkt != defaultMkt {
+			return GetRandomImage(defaultMkt)
+		}
+		return GetRandomImage("")
+	}
+
+	if err == nil && img.ID == 0 {
+		return nil, fmt.Errorf("no images found")
+	}
+
+	if err == nil {
+		util.Logger.Debug("Found random image", zap.String("date", img.Date), zap.String("mkt", img.Mkt))
+	}
+
+	return &img, err
+}
+
+func GetImageByDate(date string, mkt string) (*model.Image, error) {
+	util.Logger.Debug("Getting image by date", zap.String("date", date), zap.String("mkt", mkt))
+	var img model.Image
+	tx := repo.DB.Where("date = ?", date)
+	if mkt != "" {
+		tx = tx.Where("mkt = ?", mkt)
+	}
+	err := tx.Preload("Variants").First(&img).Error
+	if err != nil && mkt != "" && config.GetConfig().API.EnableOnDemandFetch && util.IsValidRegion(mkt) {
+		// 如果没找到，尝试异步按需抓取该地区
+		util.Logger.Info("Image not found in DB for date, starting asynchronous on-demand fetch", zap.String("mkt", mkt), zap.String("date", date))
+		f := fetcher.NewFetcher()
+		go func() {
+			_ = f.FetchRegion(context.Background(), mkt)
+		}()
+		return nil, ErrFetchStarted
+	}
+
+	// 兜底逻辑
+	if err != nil && mkt != "" && config.GetConfig().API.EnableMktFallback {
+		defaultMkt := config.GetConfig().GetDefaultMkt()
+		util.Logger.Debug("Image by date not found, trying fallback", zap.String("date", date), zap.String("mkt", mkt), zap.String("defaultMkt", defaultMkt))
+		if mkt != defaultMkt {
+			return GetImageByDate(date, defaultMkt)
+		}
+		return GetImageByDate(date, "")
+	}
+
+	if err == nil {
+		util.Logger.Debug("Found image by date", zap.String("date", img.Date), zap.String("mkt", img.Mkt))
 	}
 	return &img, err
 }
 
-func GetImageByDate(date string) (*model.Image, error) {
-	var img model.Image
-	err := repo.DB.Where("date = ?", date).Preload("Variants").First(&img).Error
-	return &img, err
-}
-
-func GetImageList(limit int, offset int, month string) ([]model.Image, error) {
+func GetImageList(limit int, offset int, month string, mkt string) ([]model.Image, error) {
+	util.Logger.Debug("Getting image list", zap.Int("limit", limit), zap.Int("offset", offset), zap.String("month", month), zap.String("mkt", mkt))
 	var images []model.Image
 	tx := repo.DB.Model(&model.Image{})
 
@@ -97,6 +214,10 @@ func GetImageList(limit int, offset int, month string) ([]model.Image, error) {
 		tx = tx.Where("date LIKE ?", month+"%")
 	}
 
+	if mkt != "" {
+		tx = tx.Where("mkt = ?", mkt)
+	}
+
 	tx = tx.Order("date desc").Preload("Variants")
 
 	if limit > 0 {

internal/storage/local/local.go

@@ -63,3 +63,15 @@ func (l *LocalStorage) Delete(ctx context.Context, key string) error {
 func (l *LocalStorage) PublicURL(key string) (string, bool) {
 	return "", false
 }
+
+func (l *LocalStorage) Exists(ctx context.Context, key string) (bool, error) {
+	path := filepath.Join(l.root, key)
+	_, err := os.Stat(path)
+	if err == nil {
+		return true, nil
+	}
+	if os.IsNotExist(err) {
+		return false, nil
+	}
+	return false, err
+}

internal/storage/s3/s3.go

@@ -100,3 +100,18 @@ func (s *S3Storage) PublicURL(key string) (string, bool) {
 	// 也可以生成签名 URL，但这里简单处理
 	return "", false
 }
+
+func (s *S3Storage) Exists(ctx context.Context, key string) (bool, error) {
+	_, err := s.client.HeadObject(ctx, &s3.HeadObjectInput{
+		Bucket: aws.String(s.bucket),
+		Key:    aws.String(key),
+	})
+	if err != nil {
+		// 判断是否为 404
+		if strings.Contains(err.Error(), "NotFound") || strings.Contains(err.Error(), "404") {
+			return false, nil
+		}
+		return false, err
+	}
+	return true, nil
+}

internal/storage/storage.go

@@ -17,6 +17,7 @@ type Storage interface {
 	Get(ctx context.Context, key string) (io.ReadCloser, string, error)
 	Delete(ctx context.Context, key string) error
 	PublicURL(key string) (string, bool)
+	Exists(ctx context.Context, key string) (bool, error)
 }
 
 var GlobalStorage Storage

internal/storage/webdav/webdav.go

@@ -72,3 +72,16 @@ func (w *WebDAVStorage) PublicURL(key string) (string, bool) {
 	}
 	return "", false
 }
+
+func (w *WebDAVStorage) Exists(ctx context.Context, key string) (bool, error) {
+	_, err := w.client.Stat(key)
+	if err == nil {
+		return true, nil
+	}
+	// gowebdav 的错误处理比较原始，通常 404 会返回错误
+	// 这里假设报错就是不存在，或者可以根据错误消息判断
+	if strings.Contains(err.Error(), "404") || strings.Contains(err.Error(), "not found") {
+		return false, nil
+	}
+	return false, err
+}

internal/util/regions.go

@@ -0,0 +1,35 @@
+package util
+
+import "golang.org/x/text/language"
+
+type Region struct {
+	Value string `json:"value"`
+	Label string `json:"label"`
+}
+
+// IsValidRegion 校验是否为标准的地区编码 (BCP 47)
+func IsValidRegion(mkt string) bool {
+	if mkt == "" {
+		return false
+	}
+	_, err := language.Parse(mkt)
+	return err == nil
+}
+
+var AllRegions = []Region{
+	{Value: "zh-CN", Label: "中国"},
+	{Value: "en-US", Label: "美国"},
+	{Value: "ja-JP", Label: "日本"},
+	{Value: "en-AU", Label: "澳大利亚"},
+	{Value: "en-GB", Label: "英国"},
+	{Value: "de-DE", Label: "德国"},
+	{Value: "en-NZ", Label: "新西兰"},
+	{Value: "en-CA", Label: "加拿大"},
+	{Value: "fr-FR", Label: "法国"},
+	{Value: "it-IT", Label: "意大利"},
+	{Value: "es-ES", Label: "西班牙"},
+	{Value: "pt-BR", Label: "巴西"},
+	{Value: "ko-KR", Label: "韩国"},
+	{Value: "en-IN", Label: "印度"},
+	{Value: "ru-RU", Label: "俄罗斯"},
+}

webapp/src/components/ui/calendar/Calendar.vue

@@ -2,10 +2,10 @@
   <div class="fixed inset-0 z-40">
     <div 
       ref="calendarPanel"
-      class="fixed bg-gradient-to-br from-black/30 via-black/20 to-black/30 backdrop-blur-xl rounded-3xl p-3 sm:p-4 w-[calc(100%-1rem)] sm:w-full max-w-[95vw] sm:max-w-[420px] shadow-2xl border border-white/10 cursor-move select-none"
+      class="fixed bg-gradient-to-br from-black/30 via-black/20 to-black/30 backdrop-blur-xl rounded-3xl p-3 sm:p-4 w-[calc(100%-1rem)] sm:w-full max-w-[95vw] sm:max-w-[420px] shadow-2xl border border-white/10 cursor-move select-none touch-none"
       :style="{ left: panelPos.x + 'px', top: panelPos.y + 'px' }"
       @mousedown="startDrag"
-      @touchstart="startDrag"
+      @touchstart.passive="startDrag"
       @click.stop
     >
       <!-- 拖动手柄指示器 -->
@@ -28,7 +28,7 @@
             <!-- 年月选择器 -->
             <div class="flex items-center justify-center gap-1 sm:gap-1.5 mb-0.5">
               <!-- 年份选择 -->
-              <Select v-model="currentYearString" @update:modelValue="onYearChange">
+              <Select v-model="currentYearString">
                 <SelectTrigger 
                   class="w-[90px] sm:w-[105px] h-6 sm:h-7 bg-white/10 text-white border-white/20 hover:bg-white/20 backdrop-blur-md font-bold text-xs sm:text-sm px-1.5 sm:px-2"
                   @click.stop
@@ -49,7 +49,7 @@
               </Select>
               
               <!-- 月份选择 -->
-              <Select v-model="currentMonthString" @update:modelValue="onMonthChange">
+              <Select v-model="currentMonthString">
                 <SelectTrigger 
                   class="w-[65px] sm:w-[75px] h-6 sm:h-7 bg-white/10 text-white border-white/20 hover:bg-white/20 backdrop-blur-md font-bold text-xs sm:text-sm px-1.5 sm:px-2"
                   @click.stop
@@ -214,7 +214,8 @@ interface CalendarDay {
 }
 
 const props = defineProps<{
-  selectedDate: string // YYYY-MM-DD
+  selectedDate?: string,
+  mkt?: string
 }>()
 
 const emit = defineEmits<{
@@ -229,10 +230,14 @@ const panelPos = ref({ x: 0, y: 0 })
 const isDragging = ref(false)
 const dragStart = ref({ x: 0, y: 0 })
 
+// 响应式窗口大小
+const windowSize = ref({ width: window.innerWidth, height: window.innerHeight })
+const isMobile = computed(() => windowSize.value.width < 768)
+
 // 计算图片实际显示区域（与ImageView保持一致）
 const getImageDisplayBounds = () => {
-  const windowWidth = window.innerWidth
-  const windowHeight = window.innerHeight
+  const windowWidth = windowSize.value.width
+  const windowHeight = windowSize.value.height
   
   // 必应图片通常是16:9或类似宽高比
   const imageAspectRatio = 16 / 9
@@ -271,11 +276,10 @@ const getImageDisplayBounds = () => {
 const initPanelPosition = () => {
   if (typeof window !== 'undefined') {
     const bounds = getImageDisplayBounds()
-    const isMobile = window.innerWidth < 640 // sm breakpoint
     
-    if (isMobile) {
-      // 移动端：在图片区域内居中显示
-      const panelWidth = Math.min(bounds.width - 16, window.innerWidth - 16)
+    if (isMobile.value) {
+      // 移动端：居中显示，尽量在图片内，但不强求
+      const panelWidth = Math.min(bounds.width - 16, windowSize.value.width - 16)
       const panelHeight = 580 // 估计高度
       panelPos.value = {
         x: Math.max(bounds.left, bounds.left + (bounds.width - panelWidth) / 2),
@@ -316,20 +320,6 @@ const currentMonthString = computed({
   }
 })
 
-// 年份改变处理
-const onYearChange = (value: any) => {
-  if (value !== null && value !== undefined) {
-    currentYear.value = Number(value)
-  }
-}
-
-// 月份改变处理
-const onMonthChange = (value: any) => {
-  if (value !== null && value !== undefined) {
-    currentMonth.value = Number(value)
-  }
-}
-
 // 生成年份选项（从2009年到当前年份+10年）
 const yearOptions = computed(() => {
   const currentYearValue = new Date().getFullYear()
@@ -379,8 +369,20 @@ const loadHolidaysForYear = async (year: number) => {
   }
 }
 
+// 窗口缩放处理
+const handleResize = () => {
+  windowSize.value = {
+    width: window.innerWidth,
+    height: window.innerHeight
+  }
+  initPanelPosition()
+}
+
 // 组件挂载时加载当前年份的假期数据
 onMounted(() => {
+  if (typeof window !== 'undefined') {
+    window.addEventListener('resize', handleResize)
+  }
   const currentYearValue = currentYear.value
   loadHolidaysForYear(currentYearValue)
   // 预加载前后一年的数据
@@ -404,7 +406,9 @@ const startDrag = (e: MouseEvent | TouchEvent) => {
     return
   }
   
-  e.preventDefault()
+  if (e instanceof MouseEvent) {
+    e.preventDefault()
+  }
   isDragging.value = true
   
   const clientX = e instanceof MouseEvent ? e.clientX : e.touches[0].clientX
@@ -417,7 +421,7 @@ const startDrag = (e: MouseEvent | TouchEvent) => {
   
   document.addEventListener('mousemove', onDrag)
   document.addEventListener('mouseup', stopDrag)
-  document.addEventListener('touchmove', onDrag, { passive: false })
+  document.addEventListener('touchmove', onDrag, { passive: true })
   document.addEventListener('touchend', stopDrag)
 }
 
@@ -425,7 +429,7 @@ const startDrag = (e: MouseEvent | TouchEvent) => {
 const onDrag = (e: MouseEvent | TouchEvent) => {
   if (!isDragging.value) return
   
-  if (e instanceof TouchEvent) {
+  if (e instanceof MouseEvent) {
     e.preventDefault()
   }
   
@@ -435,15 +439,26 @@ const onDrag = (e: MouseEvent | TouchEvent) => {
   const newX = clientX - dragStart.value.x
   const newY = clientY - dragStart.value.y
   
-  // 限制在图片实际显示区域内
+  // 限制在有效区域内
   if (calendarPanel.value) {
     const rect = calendarPanel.value.getBoundingClientRect()
-    const bounds = getImageDisplayBounds()
     
-    const minX = bounds.left
-    const maxX = bounds.right - rect.width
-    const minY = bounds.top
-    const maxY = bounds.bottom - rect.height
+    let minX, maxX, minY, maxY
+    
+    if (isMobile.value) {
+      // 移动端：不限制区域，限制在视口内即可
+      minX = 0
+      maxX = windowSize.value.width - rect.width
+      minY = 0
+      maxY = windowSize.value.height - rect.height
+    } else {
+      // 桌面端：限制在图片实际显示区域内
+      const bounds = getImageDisplayBounds()
+      minX = bounds.left
+      maxX = bounds.right - rect.width
+      minY = bounds.top
+      maxY = bounds.bottom - rect.height
+    }
     
     panelPos.value = {
       x: Math.max(minX, Math.min(newX, maxX)),
@@ -517,7 +532,7 @@ const createDayObject = (date: Date, isCurrentMonth: boolean): CalendarDay => {
   const today = new Date()
   today.setHours(0, 0, 0, 0)
   
-  const selectedDate = new Date(props.selectedDate)
+  const selectedDate = new Date(props.selectedDate || new Date())
   selectedDate.setHours(0, 0, 0, 0)
   
   // 转换为农历
@@ -626,6 +641,9 @@ const goToToday = () => {
 // 清理
 import { onUnmounted } from 'vue'
 onUnmounted(() => {
+  if (typeof window !== 'undefined') {
+    window.removeEventListener('resize', handleResize)
+  }
   document.removeEventListener('mousemove', onDrag)
   document.removeEventListener('mouseup', stopDrag)
   document.removeEventListener('touchmove', onDrag)

webapp/src/composables/useImages.ts

@@ -2,11 +2,12 @@ import { ref, onMounted, watch } from 'vue'
 import type { Ref } from 'vue'
 import { bingPaperApi } from '@/lib/api-service'
 import type { ImageMeta } from '@/lib/api-types'
+import { getDefaultMkt } from '@/lib/mkt-utils'
 
 /**
  * 获取今日图片
  */
-export function useTodayImage() {
+export function useTodayImage(mkt?: string) {
   const image = ref<ImageMeta | null>(null)
   const loading = ref(false)
   const error = ref<Error | null>(null)
@@ -15,7 +16,7 @@ export function useTodayImage() {
     loading.value = true
     error.value = null
     try {
-      image.value = await bingPaperApi.getTodayImageMeta()
+      image.value = await bingPaperApi.getTodayImageMeta(mkt || getDefaultMkt())
     } catch (e) {
       error.value = e as Error
       console.error('Failed to fetch today image:', e)
@@ -36,6 +37,39 @@ export function useTodayImage() {
   }
 }
 
+/**
+ * 获取全球今日图片
+ */
+export function useGlobalTodayImages() {
+  const images = ref<ImageMeta[]>([])
+  const loading = ref(false)
+  const error = ref<Error | null>(null)
+
+  const fetchImages = async () => {
+    loading.value = true
+    error.value = null
+    try {
+      images.value = await bingPaperApi.getGlobalTodayImages()
+    } catch (e) {
+      error.value = e as Error
+      console.error('Failed to fetch global today images:', e)
+    } finally {
+      loading.value = false
+    }
+  }
+
+  onMounted(() => {
+    fetchImages()
+  })
+
+  return {
+    images,
+    loading,
+    error,
+    refetch: fetchImages
+  }
+}
+
 /**
  * 获取图片列表（支持分页和月份筛选）
  */
@@ -46,8 +80,9 @@ export function useImageList(pageSize = 30) {
   const hasMore = ref(true)
   const currentPage = ref(1)
   const currentMonth = ref<string | undefined>(undefined)
+  const currentMkt = ref<string | undefined>(getDefaultMkt())
 
-  const fetchImages = async (page = 1, month?: string) => {
+  const fetchImages = async (page = 1, month?: string, mkt?: string) => {
     if (loading.value) return
     
     loading.value = true
@@ -55,7 +90,8 @@ export function useImageList(pageSize = 30) {
     try {
       const params: any = {
         page,
-        page_size: pageSize
+        page_size: pageSize,
+        mkt: mkt || currentMkt.value || getDefaultMkt()
       }
       if (month) {
         params.month = month
@@ -84,7 +120,7 @@ export function useImageList(pageSize = 30) {
 
   const loadMore = () => {
     if (!loading.value && hasMore.value) {
-      fetchImages(currentPage.value + 1, currentMonth.value)
+      fetchImages(currentPage.value + 1, currentMonth.value, currentMkt.value)
     }
   }
 
@@ -92,7 +128,14 @@ export function useImageList(pageSize = 30) {
     currentMonth.value = month
     currentPage.value = 1
     hasMore.value = true
-    fetchImages(1, month)
+    fetchImages(1, month, currentMkt.value)
+  }
+
+  const filterByMkt = (mkt?: string) => {
+    currentMkt.value = mkt
+    currentPage.value = 1
+    hasMore.value = true
+    fetchImages(1, currentMonth.value, mkt)
   }
 
   onMounted(() => {
@@ -106,10 +149,11 @@ export function useImageList(pageSize = 30) {
     hasMore,
     loadMore,
     filterByMonth,
+    filterByMkt,
     refetch: () => {
       currentPage.value = 1
       hasMore.value = true
-      fetchImages(1, currentMonth.value)
+      fetchImages(1, currentMonth.value, currentMkt.value)
     }
   }
 }
@@ -117,7 +161,7 @@ export function useImageList(pageSize = 30) {
 /**
  * 获取指定日期的图片
  */
-export function useImageByDate(dateRef: Ref<string>) {
+export function useImageByDate(dateRef: Ref<string>, mktRef?: Ref<string | undefined>) {
   const image = ref<ImageMeta | null>(null)
   const loading = ref(false)
   const error = ref<Error | null>(null)
@@ -126,7 +170,7 @@ export function useImageByDate(dateRef: Ref<string>) {
     loading.value = true
     error.value = null
     try {
-      image.value = await bingPaperApi.getImageMetaByDate(dateRef.value)
+      image.value = await bingPaperApi.getImageMetaByDate(dateRef.value, mktRef?.value || getDefaultMkt())
     } catch (e) {
       error.value = e as Error
       console.error(`Failed to fetch image for date ${dateRef.value}:`, e)
@@ -135,10 +179,16 @@ export function useImageByDate(dateRef: Ref<string>) {
     }
   }
 
-  // 监听日期变化，自动重新获取
-  watch(dateRef, () => {
-    fetchImage()
-  }, { immediate: true })
+  // 监听日期和地区变化，自动重新获取
+  if (mktRef) {
+    watch([dateRef, mktRef], () => {
+      fetchImage()
+    }, { immediate: true })
+  } else {
+    watch(dateRef, () => {
+      fetchImage()
+    }, { immediate: true })
+  }
 
   return {
     image,

webapp/src/lib/api-config.ts

@@ -35,6 +35,26 @@ export const buildApiUrl = (endpoint: string): string => {
   return `${API_BASE_URL}${normalizedEndpoint}`
 }
 
+/**
+ * 标准化图片 URL
+ * 当后端返回相对路径且配置了绝对 API 基础地址时，自动拼接完整域名
+ */
+export const normalizeImageUrl = (url: string | undefined): string => {
+  if (!url) return ''
+  if (url.startsWith('http')) return url
+
+  // 处理相对路径问题：如果配置了绝对 API 基础地址，则拼接 Origin
+  if (API_BASE_URL.startsWith('http')) {
+    try {
+      const origin = new URL(API_BASE_URL).origin
+      return url.startsWith('/') ? origin + url : origin + '/' + url
+    } catch (e) {
+      // 解析失败则返回原样
+    }
+  }
+  return url
+}
+
 /**
  * HTTP 状态码枚举
  */

webapp/src/lib/api-service.ts

@@ -7,6 +7,7 @@ import type {
   UpdateTokenRequest,
   ChangePasswordRequest,
   Config,
+  Region,
   ImageMeta,
   ImageListParams,
   ManualFetchRequest,
@@ -109,6 +110,7 @@ export class BingPaperApiService {
     if (params?.page) searchParams.set('page', params.page.toString())
     if (params?.page_size) searchParams.set('page_size', params.page_size.toString())
     if (params?.month) searchParams.set('month', params.month)
+    if (params?.mkt) searchParams.set('mkt', params.mkt)
     
     const queryString = searchParams.toString()
     const endpoint = queryString ? `/images?${queryString}` : '/images'
@@ -116,48 +118,68 @@ export class BingPaperApiService {
     return apiClient.get<ImageMeta[]>(endpoint)
   }
 
+  /**
+   * 获取所有地区的今日图片列表
+   */
+  async getGlobalTodayImages(): Promise<ImageMeta[]> {
+    return apiClient.get<ImageMeta[]>('/images/global/today')
+  }
+
+  /**
+   * 获取支持的地区列表
+   */
+  async getRegions(): Promise<Region[]> {
+    return apiClient.get<Region[]>('/regions')
+  }
+
   /**
    * 获取今日图片元数据
    */
-  async getTodayImageMeta(): Promise<ImageMeta> {
-    return apiClient.get<ImageMeta>('/image/today/meta')
+  async getTodayImageMeta(mkt?: string): Promise<ImageMeta> {
+    const endpoint = mkt ? `/image/today/meta?mkt=${mkt}` : '/image/today/meta'
+    return apiClient.get<ImageMeta>(endpoint)
   }
 
   /**
    * 获取指定日期图片元数据
    */
-  async getImageMetaByDate(date: string): Promise<ImageMeta> {
-    return apiClient.get<ImageMeta>(`/image/date/${date}/meta`)
+  async getImageMetaByDate(date: string, mkt?: string): Promise<ImageMeta> {
+    const endpoint = mkt ? `/image/date/${date}/meta?mkt=${mkt}` : `/image/date/${date}/meta`
+    return apiClient.get<ImageMeta>(endpoint)
   }
 
   /**
    * 获取随机图片元数据
    */
-  async getRandomImageMeta(): Promise<ImageMeta> {
-    return apiClient.get<ImageMeta>('/image/random/meta')
+  async getRandomImageMeta(mkt?: string): Promise<ImageMeta> {
+    const endpoint = mkt ? `/image/random/meta?mkt=${mkt}` : '/image/random/meta'
+    return apiClient.get<ImageMeta>(endpoint)
   }
 
   /**
    * 构建图片 URL
    */
-  getTodayImageUrl(variant: ImageVariant = 'UHD', format: ImageFormat = 'jpg'): string {
+  getTodayImageUrl(variant: ImageVariant = 'UHD', format: ImageFormat = 'jpg', mkt?: string): string {
     const params = new URLSearchParams({ variant, format })
+    if (mkt) params.set('mkt', mkt)
     return `${apiConfig.baseURL}/image/today?${params.toString()}`
   }
 
   /**
    * 构建指定日期图片 URL
    */
-  getImageUrlByDate(date: string, variant: ImageVariant = 'UHD', format: ImageFormat = 'jpg'): string {
+  getImageUrlByDate(date: string, variant: ImageVariant = 'UHD', format: ImageFormat = 'jpg', mkt?: string): string {
     const params = new URLSearchParams({ variant, format })
+    if (mkt) params.set('mkt', mkt)
     return `${apiConfig.baseURL}/image/date/${date}?${params.toString()}`
   }
 
   /**
    * 构建随机图片 URL
    */
-  getRandomImageUrl(variant: ImageVariant = 'UHD', format: ImageFormat = 'jpg'): string {
+  getRandomImageUrl(variant: ImageVariant = 'UHD', format: ImageFormat = 'jpg', mkt?: string): string {
     const params = new URLSearchParams({ variant, format })
+    if (mkt) params.set('mkt', mkt)
     return `${apiConfig.baseURL}/image/random?${params.toString()}`
   }
 
@@ -197,6 +219,8 @@ export const {
   manualFetch,
   manualCleanup,
   getImages,
+  getGlobalTodayImages,
+  getRegions,
   getTodayImageMeta,
   getImageMetaByDate,
   getRandomImageMeta,

webapp/src/lib/api-types.ts

@@ -61,6 +61,11 @@ export interface Config {
   Token: TokenConfig
   Feature: FeatureConfig
   Web: WebConfig
+  Fetcher: FetcherConfig
+}
+
+export interface FetcherConfig {
+  Regions: string[]
 }
 
 export interface AdminConfig {
@@ -69,6 +74,8 @@ export interface AdminConfig {
 
 export interface APIConfig {
   Mode: string // 'local' | 'redirect'
+  EnableMktFallback: boolean
+  EnableOnDemandFetch: boolean
 }
 
 export interface CronConfig {
@@ -147,6 +154,7 @@ export interface WebConfig {
 
 export interface ImageMeta {
   date?: string
+  mkt?: string
   title?: string
   copyright?: string
   copyrightlink?: string    // 图片的详细版权链接（指向 Bing 搜索页面）
@@ -173,6 +181,12 @@ export interface ImageListParams extends PaginationParams {
   page?: number        // 页码（从1开始）
   page_size?: number   // 每页数量
   month?: string       // 按月份过滤（格式：YYYY-MM）
+  mkt?: string         // 地区编码
+}
+
+export interface Region {
+  value: string
+  label: string
 }
 
 export interface ManualFetchRequest {

webapp/src/lib/mkt-utils.ts

@@ -0,0 +1,75 @@
+
+const MKT_STORAGE_KEY = 'bing_paper_selected_mkt'
+const DEFAULT_MKT = 'zh-CN'
+
+/**
+ * 默认地区列表 (兜底用)
+ */
+export const DEFAULT_REGIONS = [
+  { value: 'zh-CN', label: '中国' },
+  { value: 'en-US', label: '美国' },
+  { value: 'ja-JP', label: '日本' },
+  { value: 'en-AU', label: '澳大利亚' },
+  { value: 'en-GB', label: '英国' },
+  { value: 'de-DE', label: '德国' },
+  { value: 'en-NZ', label: '新西兰' },
+  { value: 'en-CA', label: '加拿大' },
+  { value: 'fr-FR', label: '法国' },
+  { value: 'it-IT', label: '意大利' },
+  { value: 'es-ES', label: '西班牙' },
+  { value: 'pt-BR', label: '巴西' },
+  { value: 'ko-KR', label: '韩国' },
+  { value: 'en-IN', label: '印度' },
+  { value: 'ru-RU', label: '俄罗斯' },
+  { value: 'zh-HK', label: '中国香港' },
+  { value: 'zh-TW', label: '中国台湾' },
+]
+
+/**
+ * 支持的地区列表 (优先使用后端提供的)
+ */
+export let SUPPORTED_REGIONS = [...DEFAULT_REGIONS]
+
+/**
+ * 更新支持的地区列表
+ */
+export function setSupportedRegions(regions: typeof DEFAULT_REGIONS): void {
+  SUPPORTED_REGIONS = regions
+}
+
+/**
+ * 获取浏览器首选地区
+ */
+export function getBrowserMkt(): string {
+  const lang = navigator.language || (navigator as any).userLanguage
+  if (!lang) return DEFAULT_MKT
+
+  // 尝试精确匹配
+  const exactMatch = SUPPORTED_REGIONS.find(r => r.value.toLowerCase() === lang.toLowerCase())
+  if (exactMatch) return exactMatch.value
+
+  // 尝试模糊匹配 (前两个字符，如 en-GB 匹配 en-US)
+  const prefix = lang.split('-')[0].toLowerCase()
+  const prefixMatch = SUPPORTED_REGIONS.find(r => r.value.split('-')[0].toLowerCase() === prefix)
+  if (prefixMatch) return prefixMatch.value
+
+  return DEFAULT_MKT
+}
+
+/**
+ * 获取当前选择的地区 (优先从 localStorage 获取，其次从浏览器获取)
+ */
+export function getDefaultMkt(): string {
+  const saved = localStorage.getItem(MKT_STORAGE_KEY)
+  if (saved && SUPPORTED_REGIONS.some(r => r.value === saved)) {
+    return saved
+  }
+  return getBrowserMkt()
+}
+
+/**
+ * 保存选择的地区
+ */
+export function setSavedMkt(mkt: string): void {
+  localStorage.setItem(MKT_STORAGE_KEY, mkt)
+}

webapp/src/views/AdminConfig.vue

@@ -102,6 +102,33 @@
                 local: 直接返回图片流; redirect: 重定向到存储位置
               </p>
             </div>
+            <div class="space-y-4">
+              <div class="flex items-center justify-between">
+                <div class="space-y-0.5">
+                  <Label for="api-fallback">启用地区不存在时兜底</Label>
+                  <p class="text-xs text-gray-500">
+                    如果请求的地区无数据，自动回退到默认地区
+                  </p>
+                </div>
+                <Switch
+                  id="api-fallback"
+                  v-model="config.API.EnableMktFallback"
+                />
+              </div>
+
+              <div class="flex items-center justify-between">
+                <div class="space-y-0.5">
+                  <Label for="api-on-demand">启用按需实时抓取</Label>
+                  <p class="text-xs text-gray-500">
+                    如果请求的地区无数据，尝试实时从 Bing 抓取
+                  </p>
+                </div>
+                <Switch
+                  id="api-on-demand"
+                  v-model="config.API.EnableOnDemandFetch"
+                />
+              </div>
+            </div>
           </CardContent>
         </Card>
 
@@ -372,6 +399,31 @@
           </CardContent>
         </Card>
 
+        <!-- 抓取配置 -->
+        <Card>
+          <CardHeader>
+            <CardTitle>抓取配置</CardTitle>
+          </CardHeader>
+          <CardContent class="space-y-4">
+            <div class="space-y-2">
+              <Label>抓取地区</Label>
+              <div class="grid grid-cols-2 md:grid-cols-4 gap-4 mt-2">
+                <div v-for="region in allRegions" :key="region.value" class="flex items-center space-x-2">
+                  <Checkbox 
+                    :id="'region-'+region.value" 
+                    :checked="config.Fetcher.Regions.includes(region.value)"
+                    @update:checked="(checked: any) => toggleRegion(region.value, !!checked)"
+                  />
+                  <Label :for="'region-'+region.value" class="text-sm font-normal cursor-pointer">{{ region.label }}</Label>
+                </div>
+              </div>
+              <p class="text-xs text-gray-500 mt-2">
+                勾选需要定期抓取壁纸的地区。如果不勾选任何地区，默认将只抓取 zh-CN。
+              </p>
+            </div>
+          </CardContent>
+        </Card>
+
         <!-- 功能特性配置 -->
         <Card>
           <CardHeader>
@@ -414,6 +466,7 @@ import { Input } from '@/components/ui/input'
 import { Label } from '@/components/ui/label'
 import { Textarea } from '@/components/ui/textarea'
 import { Switch } from '@/components/ui/switch'
+import { Checkbox } from '@/components/ui/checkbox'
 import { Select, SelectContent, SelectItem, SelectTrigger, SelectValue } from '@/components/ui/select'
 import { apiService } from '@/lib/api-service'
 import type { Config } from '@/lib/api-types'
@@ -424,9 +477,12 @@ const loadError = ref('')
 const saveLoading = ref(false)
 const dsnError = ref('')
 
+// 所有可选地区列表
+const allRegions = ref<any[]>([])
+
 const config = ref<Config>({
   Admin: { PasswordBcrypt: '' },
-  API: { Mode: 'local' },
+  API: { Mode: 'local', EnableMktFallback: true, EnableOnDemandFetch: false },
   Cron: { Enabled: true, DailySpec: '0 9 * * *' },
   DB: { Type: 'sqlite', DSN: '' },
   Feature: { WriteDailyFiles: true },
@@ -464,12 +520,37 @@ const config = ref<Config>({
     }
   },
   Token: { DefaultTTL: '168h' },
-  Web: { Path: './webapp/dist' }
+  Web: { Path: './webapp/dist' },
+  Fetcher: { Regions: [] }
 })
 
 const configJson = ref('')
 const jsonError = ref('')
 
+// 获取所有地区
+const fetchRegions = async () => {
+  try {
+    const data = await apiService.getRegions()
+    allRegions.value = data
+  } catch (err) {
+    console.error('获取地区列表失败:', err)
+  }
+}
+
+const toggleRegion = (regionValue: string, checked: boolean) => {
+  if (!config.value.Fetcher.Regions) {
+    config.value.Fetcher.Regions = []
+  }
+  
+  if (checked) {
+    if (!config.value.Fetcher.Regions.includes(regionValue)) {
+      config.value.Fetcher.Regions.push(regionValue)
+    }
+  } else {
+    config.value.Fetcher.Regions = config.value.Fetcher.Regions.filter(r => r !== regionValue)
+  }
+}
+
 // DSN 示例
 const dsnExamples = computed(() => {
   switch (config.value.DB.Type) {
@@ -602,6 +683,7 @@ const handleSaveConfig = async () => {
 }
 
 onMounted(() => {
+  fetchRegions()
   fetchConfig()
 })
 </script>

webapp/src/views/ApiDocs.vue

@@ -103,6 +103,10 @@
                   <code class="text-yellow-400 min-w-24">format</code>
                   <span class="text-white/50">格式: jpg (默认: jpg)</span>
                 </div>
+                <div class="flex gap-4 text-sm">
+                  <code class="text-yellow-400 min-w-24">mkt</code>
+                  <span class="text-white/50">地区编码 (如 zh-CN, en-US, ja-JP)，默认由服务器自动探测</span>
+                </div>
               </div>
             </div>
 
@@ -182,6 +186,10 @@
                   <code class="text-yellow-400 min-w-24">format</code>
                   <span class="text-white/50">格式 (默认: jpg)</span>
                 </div>
+                <div class="flex gap-4 text-sm">
+                  <code class="text-yellow-400 min-w-24">mkt</code>
+                  <span class="text-white/50">地区编码 (如 zh-CN, en-US, ja-JP)</span>
+                </div>
               </div>
             </div>
 
@@ -254,6 +262,10 @@
                   <code class="text-yellow-400 min-w-24">format</code>
                   <span class="text-white/50">格式 (默认: jpg)</span>
                 </div>
+                <div class="flex gap-4 text-sm">
+                  <code class="text-yellow-400 min-w-24">mkt</code>
+                  <span class="text-white/50">地区编码 (如 zh-CN, en-US, ja-JP)</span>
+                </div>
               </div>
             </div>
 
@@ -334,6 +346,10 @@
                 <code class="text-yellow-400 min-w-32">date</code>
                 <span class="text-white/60">图片日期（格式：YYYY-MM-DD）</span>
               </div>
+              <div class="flex gap-4">
+                <code class="text-yellow-400 min-w-32">mkt</code>
+                <span class="text-white/60">地区编码（如 zh-CN, en-US）</span>
+              </div>
               <div class="flex gap-4">
                 <code class="text-yellow-400 min-w-32">title</code>
                 <span class="text-white/60">图片标题</span>
@@ -458,24 +474,26 @@
 <script setup lang="ts">
 import { ref } from 'vue'
 import { API_BASE_URL } from '@/lib/api-config'
+import { getDefaultMkt } from '@/lib/mkt-utils'
 
 const baseURL = ref(API_BASE_URL)
 const previewImage = ref<string | null>(null)
+const defaultMkt = getDefaultMkt()
 
 // 获取今日图片示例
 const getTodayImageExample = () => {
-  return `${baseURL.value}/image/today?variant=UHD&format=jpg`
+  return `${baseURL.value}/image/today?variant=UHD&format=jpg&mkt=${defaultMkt}`
 }
 
 // 获取指定日期图片示例
 const getDateImageExample = () => {
   const today = new Date().toISOString().split('T')[0]
-  return `${baseURL.value}/image/date/${today}?variant=1920x1080&format=jpg`
+  return `${baseURL.value}/image/date/${today}?variant=1920x1080&format=jpg&mkt=${defaultMkt}`
 }
 
 // 获取随机图片示例
 const getRandomImageExample = () => {
-  return `${baseURL.value}/image/random?variant=UHD&format=jpg`
+  return `${baseURL.value}/image/random?variant=UHD&format=jpg&mkt=${defaultMkt}`
 }
 
 // 复制到剪贴板

webapp/src/views/Home.vue

@@ -69,6 +69,81 @@
       </div>
     </section>
 
+    <!-- Global Section - 必应全球 -->
+    <section v-if="globalImages.length > 0" class="py-16 px-4 md:px-8 lg:px-16 bg-white/5 border-y border-white/5">
+      <div class="max-w-7xl mx-auto">
+        <div class="flex items-center justify-between mb-8">
+          <div class="space-y-1">
+            <h2 class="text-3xl md:text-4xl font-bold text-white">
+              必应全球
+            </h2>
+          </div>
+        </div>
+
+        <div class="relative group">
+          <!-- 左右切换按钮 -->
+          <button 
+            @click="scrollGlobal('left')"
+            class="absolute left-[-20px] top-1/2 -translate-y-1/2 z-20 p-2 bg-black/50 backdrop-blur-md rounded-full text-white opacity-0 group-hover:opacity-100 transition-opacity hidden md:block border border-white/10 hover:bg-black/70"
+          >
+            <svg class="w-6 h-6" fill="none" stroke="currentColor" viewBox="0 0 24 24">
+              <path stroke-linecap="round" stroke-linejoin="round" stroke-width="2" d="M15 19l-7-7 7-7"></path>
+            </svg>
+          </button>
+          <button 
+            @click="scrollGlobal('right')"
+            class="absolute right-[-20px] top-1/2 -translate-y-1/2 z-20 p-2 bg-black/50 backdrop-blur-md rounded-full text-white opacity-0 group-hover:opacity-100 transition-opacity hidden md:block border border-white/10 hover:bg-black/70"
+          >
+            <svg class="w-6 h-6" fill="none" stroke="currentColor" viewBox="0 0 24 24">
+              <path stroke-linecap="round" stroke-linejoin="round" stroke-width="2" d="M9 5l7 7-7 7"></path>
+            </svg>
+          </button>
+
+          <div 
+            ref="globalScrollContainer"
+            class="flex overflow-x-auto gap-6 pb-6 -mx-4 px-4 md:mx-0 md:px-0 scrollbar-hide snap-x scroll-smooth"
+            @wheel="handleGlobalWheel"
+          >
+            <div 
+              v-for="image in globalImages" 
+              :key="image.mkt! + image.date!"
+              class="flex-none w-[280px] md:w-[350px] aspect-video rounded-xl overflow-hidden cursor-pointer transform transition-all duration-500 hover:scale-[1.02] hover:shadow-2xl snap-start relative group/card"
+              @click="viewImage(image.date!, image.mkt!)"
+            >
+              <!-- 图片层 -->
+              <img 
+                :src="getImageUrl(image)" 
+                :alt="image.title"
+                class="w-full h-full object-cover transition-transform duration-700 group-hover/card:scale-110"
+              />
+              
+              <!-- 渐变层 -->
+              <div class="absolute inset-0 bg-gradient-to-t from-black/90 via-black/20 to-transparent group-hover/card:via-black/40 transition-colors duration-500"></div>
+              
+              <!-- 内容层 -->
+              <div class="absolute inset-0 flex flex-col justify-end p-5">
+                <div class="text-[10px] md:text-xs text-white/60 mb-1 transform translate-y-2 group-hover/card:translate-y-0 transition-transform duration-500">
+                  {{ formatDate(image.date) }}
+                </div>
+                <div class="flex items-center gap-2 mb-2 transform translate-y-2 group-hover/card:translate-y-0 transition-transform duration-500">
+                  <span class="text-xs text-white/70 font-medium">
+                    {{ getRegionLabel(image.mkt) }}
+                  </span>
+                </div>
+                
+                <h3 class="text-white font-bold text-base md:text-lg line-clamp-1 transform translate-y-1 group-hover/card:translate-y-0 transition-transform duration-500">
+                  {{ image.title || '必应每日一图' }}
+                </h3>
+              </div>
+            </div>
+          </div>
+          
+          <!-- 左右渐变遮罩 (仅在大屏显示) -->
+          <div class="absolute right-0 top-0 bottom-6 w-24 bg-gradient-to-l from-gray-900 to-transparent pointer-events-none hidden md:block opacity-0 group-hover:opacity-100 transition-opacity duration-500"></div>
+        </div>
+      </div>
+    </section>
+
     <!-- Gallery Section - 历史图片 -->
     <section class="py-16 px-4 md:px-8 lg:px-16">
       <div class="max-w-7xl mx-auto">
@@ -79,6 +154,23 @@
           
           <!-- 筛选器 -->
           <div class="flex flex-wrap items-center gap-3">
+            <!-- 地区选择 -->
+            <Select v-model="selectedMkt" @update:model-value="onMktChange">
+              <SelectTrigger class="w-[180px] bg-white/10 backdrop-blur-md text-white border-white/20 hover:bg-white/15 hover:border-white/30 focus:ring-white/50 shadow-lg">
+                <SelectValue placeholder="选择地区" />
+              </SelectTrigger>
+              <SelectContent class="bg-gray-900/95 backdrop-blur-xl border-white/20 text-white">
+                <SelectItem 
+                  v-for="region in regions" 
+                  :key="region.value" 
+                  :value="region.value"
+                  class="focus:bg-white/10 focus:text-white cursor-pointer"
+                >
+                  {{ region.label }}
+                </SelectItem>
+              </SelectContent>
+            </Select>
+
             <!-- 年份选择 -->
             <Select v-model="selectedYear" @update:model-value="onYearChange">
               <SelectTrigger class="w-[180px] bg-white/10 backdrop-blur-md text-white border-white/20 hover:bg-white/15 hover:border-white/30 focus:ring-white/50 shadow-lg">
@@ -139,7 +231,7 @@
         </div>
 
         <!-- 图片网格 -->
-        <div class="grid grid-cols-1 sm:grid-cols-2 lg:grid-cols-3 gap-6">
+        <div class="grid grid-cols-1 sm:grid-cols-2 md:grid-cols-3 lg:grid-cols-4 xl:grid-cols-5 gap-6">
           <div 
             v-for="(image, index) in images" 
             :key="image.date || index"
@@ -153,7 +245,7 @@
             </div>
             <img 
               v-else
-              :src="getImageUrl(image.date!)" 
+              :src="getImageUrl(image)" 
               :alt="image.title || 'Bing Image'"
               class="w-full h-full object-cover transition-transform duration-500 group-hover:scale-110"
               loading="lazy"
@@ -161,14 +253,14 @@
             
             <!-- 悬浮信息层 -->
             <div class="absolute inset-0 bg-gradient-to-t from-black/90 via-black/50 to-transparent md:opacity-0 md:group-hover:opacity-100 transition-opacity duration-300">
-              <div class="absolute bottom-0 left-0 right-0 p-4 md:p-6 transform md:translate-y-4 md:group-hover:translate-y-0 transition-transform duration-300">
-                <div class="text-xs text-white/70 mb-1">
+              <div class="absolute bottom-0 left-0 right-0 p-3 md:p-4 transform md:translate-y-4 md:group-hover:translate-y-0 transition-transform duration-300">
+                <div class="text-[10px] md:text-xs text-white/70 mb-0.5">
                   {{ formatDate(image.date) }}
                 </div>
-                <h3 class="text-base md:text-lg font-semibold text-white mb-1 md:mb-2 line-clamp-2">
+                <h3 class="text-sm md:text-base font-semibold text-white mb-1 line-clamp-2">
                   {{ image.title || '未命名' }}
                 </h3>
-                <p v-if="image.copyright" class="text-xs md:text-sm text-white/80 line-clamp-2">
+                <p v-if="image.copyright" class="text-[10px] md:text-xs text-white/80 line-clamp-2">
                   {{ image.copyright }}
                 </p>
               </div>
@@ -245,9 +337,11 @@
 
 <script setup lang="ts">
 import { ref, computed, onMounted, onUnmounted, watch } from 'vue'
-import { useImageList } from '@/composables/useImages'
+import { useImageList, useGlobalTodayImages } from '@/composables/useImages'
 import { bingPaperApi } from '@/lib/api-service'
+import { normalizeImageUrl } from '@/lib/api-config'
 import { useRouter } from 'vue-router'
+import { getDefaultMkt, setSavedMkt, SUPPORTED_REGIONS, setSupportedRegions } from '@/lib/mkt-utils'
 import {
   Select,
   SelectContent,
@@ -258,18 +352,62 @@ import {
 
 const router = useRouter()
 
+// 地区列表
+const regions = ref(SUPPORTED_REGIONS)
+
 // 顶部最新图片（独立加载，不受筛选影响）
 const latestImage = ref<any>(null)
 const todayLoading = ref(false)
 
+// 全球今日图片
+const { images: globalImages } = useGlobalTodayImages()
+
+// 滚动功能实现
+const globalScrollContainer = ref<HTMLElement | null>(null)
+const scrollGlobal = (direction: 'left' | 'right') => {
+  if (!globalScrollContainer.value) return
+  // 增加翻页数量：滚动容器宽度的 80%，或者固定 3 张卡片的宽度
+  const scrollAmount = globalScrollContainer.value.clientWidth * 0.8 || 1000
+  globalScrollContainer.value.scrollBy({
+    left: direction === 'left' ? -scrollAmount : scrollAmount,
+    behavior: 'smooth'
+  })
+}
+
+// 鼠标滚轮横向滑动
+const handleGlobalWheel = (e: WheelEvent) => {
+  if (!globalScrollContainer.value) return
+  
+  const container = globalScrollContainer.value
+  const isAtStart = container.scrollLeft <= 0
+  const isAtEnd = Math.ceil(container.scrollLeft + container.clientWidth) >= container.scrollWidth
+
+  // 当鼠标在滚动区域内，且是纵向滚动时
+  if (Math.abs(e.deltaY) > Math.abs(e.deltaX)) {
+    // 如果还没滚动到尽头，则拦截纵向滚动并转为横向
+    if ((e.deltaY > 0 && !isAtEnd) || (e.deltaY < 0 && !isAtStart)) {
+      e.preventDefault()
+      // 加大滚动步进以实现“快速翻页”
+      container.scrollLeft += e.deltaY * 1.5
+    }
+  }
+}
+
 // 历史图片列表（使用服务端分页和筛选，每页15张）
-const { images, loading, hasMore, loadMore, filterByMonth } = useImageList(15)
+const { images, loading, hasMore, loadMore, filterByMonth, filterByMkt } = useImageList(15)
+
+// 获取地区标签
+const getRegionLabel = (mkt?: string) => {
+  if (!mkt) return ''
+  const region = regions.value.find(r => r.value === mkt)
+  return region ? region.label : mkt
+}
 
 // 加载顶部最新图片
 const loadLatestImage = async () => {
   todayLoading.value = true
   try {
-    const params = { page: 1, page_size: 1 }
+    const params: any = { page: 1, page_size: 1, mkt: selectedMkt.value }
     const result = await bingPaperApi.getImages(params)
     if (result.length > 0) {
       latestImage.value = result[0]
@@ -281,8 +419,17 @@ const loadLatestImage = async () => {
   }
 }
 
-// 初始化加载顶部图片
-onMounted(() => {
+// 初始化加载
+onMounted(async () => {
+  try {
+    const backendRegions = await bingPaperApi.getRegions()
+    if (backendRegions && backendRegions.length > 0) {
+      regions.value = backendRegions
+      setSupportedRegions(backendRegions)
+    }
+  } catch (error) {
+    console.error('Failed to fetch regions:', error)
+  }
   loadLatestImage()
 })
 
@@ -315,9 +462,22 @@ const nextUpdateTime = computed(() => {
 })
 
 // 筛选相关状态
+const selectedMkt = ref(getDefaultMkt())
 const selectedYear = ref('')
 const selectedMonth = ref('')
 
+const onMktChange = () => {
+  setSavedMkt(selectedMkt.value)
+  filterByMkt(selectedMkt.value)
+  loadLatestImage()
+  
+  // 重置懒加载状态
+  imageVisibility.value = []
+  setTimeout(() => {
+    setupObserver()
+  }, 100)
+}
+
 // 懒加载相关
 const imageRefs = ref<(HTMLElement | null)[]>([])
 const imageVisibility = ref<boolean[]>([])
@@ -374,11 +534,14 @@ const onFilterChange = () => {
 
 // 重置筛选
 const resetFilters = () => {
+  selectedMkt.value = getDefaultMkt()
   selectedYear.value = ''
   selectedMonth.value = ''
   
   // 重置为加载默认数据
+  filterByMkt(selectedMkt.value)
   filterByMonth(undefined)
+  loadLatestImage()
   
   // 重置懒加载状态
   imageVisibility.value = []
@@ -521,17 +684,21 @@ const formatDate = (dateStr?: string) => {
 // 获取最新图片 URL（顶部大图使用UHD高清）
 const getLatestImageUrl = () => {
   if (!latestImage.value?.date) return ''
-  return bingPaperApi.getImageUrlByDate(latestImage.value.date, 'UHD', 'jpg')
+  return bingPaperApi.getImageUrlByDate(latestImage.value.date, 'UHD', 'jpg', latestImage.value.mkt)
 }
 
-// 获取图片 URL（缩略图 - 使用较小分辨率节省流量）
-const getImageUrl = (date: string) => {
-  return bingPaperApi.getImageUrlByDate(date, '640x480', 'jpg')
+// 获取图片 URL（缩略图 - 优先使用后端返回的最小变体以节省流量）
+const getImageUrl = (image: any) => {
+  if (image.variants && image.variants.length > 0) {
+    return normalizeImageUrl(image.variants[0].url)
+  }
+  return bingPaperApi.getImageUrlByDate(image.date!, '640x480', 'jpg', image.mkt)
 }
 
 // 查看图片详情
-const viewImage = (date: string) => {
-  router.push(`/image/${date}`)
+const viewImage = (date: string, mkt?: string) => {
+  const query = mkt ? `?mkt=${mkt}` : ''
+  router.push(`/image/${date}${query}`)
 }
 
 // 打开版权详情链接
@@ -571,4 +738,13 @@ html {
 html::-webkit-scrollbar {
   display: none; /* Chrome, Safari, Opera */
 }
+
+/* 隐藏横向滚动条 */
+.scrollbar-hide {
+  -ms-overflow-style: none;  /* IE and Edge */
+  scrollbar-width: none;  /* Firefox */
+}
+.scrollbar-hide::-webkit-scrollbar {
+  display: none; /* Chrome, Safari and Opera */
+}
 </style>

webapp/src/views/ImageView.vue

@@ -58,7 +58,7 @@
         <!-- 拖动手柄 -->
         <div 
           @mousedown="startDrag"
-          @touchstart="startDrag"
+          @touchstart.passive="startDrag"
           class="absolute top-2 left-1/2 -translate-x-1/2 w-12 h-1 bg-white/30 rounded-full cursor-move hover:bg-white/50 transition-colors touch-none"
         ></div>
 
@@ -178,10 +178,11 @@
 </template>
 
 <script setup lang="ts">
-import { ref, watch } from 'vue'
+import { ref, watch, onMounted, onUnmounted, computed } from 'vue'
 import { useRoute, useRouter } from 'vue-router'
 import { useImageByDate } from '@/composables/useImages'
 import { bingPaperApi } from '@/lib/api-service'
+import { getDefaultMkt } from '@/lib/mkt-utils'
 import Calendar from '@/components/ui/calendar/Calendar.vue'
 
 const route = useRoute()
@@ -202,12 +203,17 @@ const getInitialCalendarState = (): boolean => {
 }
 
 const currentDate = ref(route.params.date as string)
+const currentMkt = ref(route.query.mkt as string || getDefaultMkt())
 const showInfo = ref(true)
 const showCalendar = ref(getInitialCalendarState())
 const navigating = ref(false)
 const imageOpacity = ref(1)
 const imageTransitioning = ref(false)
 
+// 响应式窗口大小
+const windowSize = ref({ width: window.innerWidth, height: window.innerHeight })
+const isMobile = computed(() => windowSize.value.width < 768)
+
 // 前后日期可用性
 const hasPreviousDay = ref(true)
 const hasNextDay = ref(true)
@@ -222,11 +228,10 @@ let animationFrameId: number | null = null
 
 // 计算图片实际显示区域（考虑图片宽高比和object-contain）
 const getImageDisplayBounds = () => {
-  const windowWidth = window.innerWidth
-  const windowHeight = window.innerHeight
+  const windowWidth = windowSize.value.width
+  const windowHeight = windowSize.value.height
   
-  // 必应图片通常是16:9或类似宽高比
-  // 使用UHD分辨率: 1920x1080 (16:9)
+  // 必应图片通常是16:9
   const imageAspectRatio = 16 / 9
   const windowAspectRatio = windowWidth / windowHeight
   
@@ -259,22 +264,35 @@ const getImageDisplayBounds = () => {
   }
 }
 
-// 初始化浮窗位置（居中偏下，限制在图片显示区域内）
+// 初始化浮窗位置（限制在图片显示区域内，移动端默认展示在底部）
 const initPanelPosition = () => {
   if (typeof window !== 'undefined') {
     const bounds = getImageDisplayBounds()
-    const panelWidth = Math.min(bounds.width * 0.9, 448) // max-w-md = 448px
     
-    infoPanelPos.value = {
-      x: bounds.left + (bounds.width - panelWidth) / 2,
-      y: Math.max(bounds.top, bounds.bottom - 280) // 距底部280px，避免与控制栏重叠
+    if (isMobile.value) {
+      // 移动端：默认居中靠下，不严格限制在图片内（因为要求可以不限制）
+      // 但为了好看，我们还是给它一个默认位置
+      const panelWidth = windowSize.value.width * 0.9
+      infoPanelPos.value = {
+        x: (windowSize.value.width - panelWidth) / 2,
+        y: windowSize.value.height - 240 // 靠下
+      }
+    } else {
+      // 桌面端：限制在图片区域内
+      const panelWidth = Math.min(bounds.width * 0.9, 448) // max-w-md = 448px
+      infoPanelPos.value = {
+        x: bounds.left + (bounds.width - panelWidth) / 2,
+        y: Math.max(bounds.top, bounds.bottom - 280) // 距底部280px，避免与控制栏重叠
+      }
     }
   }
 }
 
 // 开始拖动
 const startDrag = (e: MouseEvent | TouchEvent) => {
-  e.preventDefault()
+  if (e instanceof MouseEvent) {
+    e.preventDefault()
+  }
   isDragging.value = true
   
   const clientX = e instanceof MouseEvent ? e.clientX : e.touches[0].clientX
@@ -287,7 +305,7 @@ const startDrag = (e: MouseEvent | TouchEvent) => {
   
   document.addEventListener('mousemove', onDrag, { passive: false })
   document.addEventListener('mouseup', stopDrag)
-  document.addEventListener('touchmove', onDrag, { passive: false })
+  document.addEventListener('touchmove', onDrag, { passive: true })
   document.addEventListener('touchend', stopDrag)
 }
 
@@ -295,7 +313,9 @@ const startDrag = (e: MouseEvent | TouchEvent) => {
 const onDrag = (e: MouseEvent | TouchEvent) => {
   if (!isDragging.value) return
   
-  e.preventDefault()
+  if (e instanceof MouseEvent) {
+    e.preventDefault()
+  }
   
   // 取消之前的动画帧
   if (animationFrameId !== null) {
@@ -310,15 +330,26 @@ const onDrag = (e: MouseEvent | TouchEvent) => {
     const newX = clientX - dragStart.value.x
     const newY = clientY - dragStart.value.y
     
-    // 限制在图片实际显示区域内，考虑底部控制栏高度（约80px）
+    // 限制在有效区域内
     if (infoPanel.value) {
       const rect = infoPanel.value.getBoundingClientRect()
-      const bounds = getImageDisplayBounds()
       
-      const minX = bounds.left
-      const maxX = bounds.right - rect.width
-      const minY = bounds.top
-      const maxY = bounds.bottom - rect.height - 80 // 预留底部控制栏空间
+      let minX, maxX, minY, maxY
+      
+      if (isMobile.value) {
+        // 移动端：不限制区域，限制在视口内即可
+        minX = 0
+        maxX = windowSize.value.width - rect.width
+        minY = 0
+        maxY = windowSize.value.height - rect.height
+      } else {
+        // 桌面端：限制在图片实际显示区域内，考虑底部控制栏高度（约80px）
+        const bounds = getImageDisplayBounds()
+        minX = bounds.left
+        maxX = bounds.right - rect.width
+        minY = bounds.top
+        maxY = bounds.bottom - rect.height - 80 // 预留底部控制栏空间
+      }
       
       infoPanelPos.value = {
         x: Math.max(minX, Math.min(newX, maxX)),
@@ -347,12 +378,12 @@ const stopDrag = () => {
 }
 
 // 使用 composable 获取图片数据（传递 ref，自动响应日期变化）
-const { image, loading, error } = useImageByDate(currentDate)
+const { image, loading, error } = useImageByDate(currentDate, currentMkt)
 
 // 检测指定日期是否有数据
 const checkDateAvailability = async (dateStr: string): Promise<boolean> => {
   try {
-    await bingPaperApi.getImageMetaByDate(dateStr)
+    await bingPaperApi.getImageMetaByDate(dateStr, currentMkt.value)
     return true
   } catch (e) {
     return false
@@ -384,9 +415,6 @@ const checkAdjacentDates = async () => {
   checkingDates.value = false
 }
 
-// 初始化位置
-initPanelPosition()
-
 // 监听showCalendar变化并自动保存到localStorage
 watch(showCalendar, (newValue) => {
   try {
@@ -401,6 +429,20 @@ watch(currentDate, () => {
   checkAdjacentDates()
 }, { immediate: true })
 
+// 监听路由变化，支持前进后退
+watch(() => route.params.date, (newDate) => {
+  if (newDate && newDate !== currentDate.value) {
+    currentDate.value = newDate as string
+  }
+})
+
+watch(() => route.query.mkt, (newMkt) => {
+  const mkt = (newMkt as string) || getDefaultMkt()
+  if (mkt !== currentMkt.value) {
+    currentMkt.value = mkt
+  }
+})
+
 // 格式化日期
 const formatDate = (dateStr?: string) => {
   if (!dateStr) return ''
@@ -415,7 +457,7 @@ const formatDate = (dateStr?: string) => {
 
 // 获取完整图片 URL
 const getFullImageUrl = () => {
-  return bingPaperApi.getImageUrlByDate(currentDate.value, 'UHD', 'jpg')
+  return bingPaperApi.getImageUrlByDate(currentDate.value, 'UHD', 'jpg', currentMkt.value)
 }
 
 // 预加载图片
@@ -432,10 +474,10 @@ const preloadImage = (url: string): Promise<void> => {
 const preloadImageAndData = async (date: string): Promise<void> => {
   try {
     // 并行预加载图片和数据
-    const imageUrl = bingPaperApi.getImageUrlByDate(date, 'UHD', 'jpg')
+    const imageUrl = bingPaperApi.getImageUrlByDate(date, 'UHD', 'jpg', currentMkt.value)
     await Promise.all([
       preloadImage(imageUrl),
-      bingPaperApi.getImageMetaByDate(date)
+      bingPaperApi.getImageMetaByDate(date, currentMkt.value)
     ])
   } catch (error) {
     console.warn('Failed to preload image or data:', error)
@@ -461,7 +503,7 @@ const switchToDate = async (newDate: string) => {
   
   // 3. 更新日期（此时图片和数据已经预加载完成）
   currentDate.value = newDate
-  router.replace(`/image/${newDate}`)
+  router.replace(`/image/${newDate}?mkt=${currentMkt.value}`)
   
   // 4. 等待一个微任务，确保 DOM 更新
   await new Promise(resolve => setTimeout(resolve, 50))
@@ -534,18 +576,29 @@ const handleKeydown = (e: KeyboardEvent) => {
   }
 }
 
-// 添加键盘事件监听
-if (typeof window !== 'undefined') {
-  window.addEventListener('keydown', handleKeydown)
-  window.addEventListener('resize', initPanelPosition)
+// 窗口缩放处理
+const handleResize = () => {
+  windowSize.value = {
+    width: window.innerWidth,
+    height: window.innerHeight
+  }
+  initPanelPosition()
 }
 
-// 清理
-import { onUnmounted } from 'vue'
+// 生命周期钩子
+onMounted(() => {
+  if (typeof window !== 'undefined') {
+    window.addEventListener('keydown', handleKeydown)
+    window.addEventListener('resize', handleResize)
+  }
+  // 初始化浮窗位置
+  initPanelPosition()
+})
+
 onUnmounted(() => {
   if (typeof window !== 'undefined') {
     window.removeEventListener('keydown', handleKeydown)
-    window.removeEventListener('resize', initPanelPosition)
+    window.removeEventListener('resize', handleResize)
     document.removeEventListener('mousemove', onDrag)
     document.removeEventListener('mouseup', stopDrag)
     document.removeEventListener('touchmove', onDrag)