merge: 合并 master 分支 (webui 改进和 attachment recovery)

- 采用 master 的 README 多语言版本和文档更新
- 采用 dev 版本号 (4.25.0) + master 的 Python 版本限制 (<3.14)
- 采用 master 的 _image_ref_to_data_url 图片处理实现
- 从 git 中移除 MDI 字体二进制文件，改由脚本生成
- 其他冲突均采用 master 版本

dashboard/scripts/subset-mdi-font.mjs

@@ -34,9 +34,42 @@ const UTILITY_CLASSES = new Set([
 ]);
 
 // Icons used indirectly by Vuetify internals, so they won't appear in src/ static scans.
-const REQUIRED_ICONS = new Set([
+export const REQUIRED_ICONS = new Set([
     "mdi-radiobox-blank",
     "mdi-radiobox-marked",
+    "mdi-menu-down",
+    "mdi-menu-right",
+    "mdi-check-circle",
+    "mdi-information",
+    "mdi-alert-circle",
+    "mdi-close-circle",
+    "mdi-chevron-down",
+    "mdi-chevron-up",
+    "mdi-chevron-left",
+    "mdi-chevron-right",
+    "mdi-check",
+    "mdi-close",
+    "mdi-checkbox-marked",
+    "mdi-checkbox-blank-outline",
+    "mdi-minus-box",
+    "mdi-circle",
+    "mdi-arrow-up",
+    "mdi-arrow-down",
+    "mdi-menu",
+    "mdi-pencil",
+    "mdi-star-outline",
+    "mdi-star",
+    "mdi-star-half-full",
+    "mdi-cached",
+    "mdi-page-first",
+    "mdi-page-last",
+    "mdi-unfold-more-horizontal",
+    "mdi-paperclip",
+    "mdi-plus",
+    "mdi-minus",
+    "mdi-calendar",
+    "mdi-eyedropper",
+    "mdi-cloud-upload",
 ]);
 
 // Regex to match individual icon class definitions in MDI CSS