功能：完善自定义主题与独立登录会话

frontend-web/src/core/system-settings/api.ts

@@ -276,7 +276,40 @@ export async function updatePublishSquares(
   return data;
 }
 
-export type ThemeMode = "light" | "dark" | "lightblue" | "lightgreen" | "iceblue" | "lightyellow";
+export const BUILTIN_THEME_IDS = [
+  "light",
+  "dark",
+  "lightblue",
+  "lightgreen",
+  "iceblue",
+  "lightyellow",
+] as const;
+
+export type BuiltinThemeId = (typeof BUILTIN_THEME_IDS)[number];
+export type ThemeMode = BuiltinThemeId | `custom-theme-${string}`;
+export type CustomThemeBaseMode = "light" | "dark";
+
+export interface CustomThemeColorOverrides {
+  button_hover?: string | null;
+  selected_background?: string | null;
+  border?: string | null;
+  muted?: string | null;
+  muted_text?: string | null;
+  destructive?: string | null;
+  brand_title?: string | null;
+  primary_foreground?: string | null;
+}
+
+export interface CustomThemePreset {
+  id: `custom-theme-${string}`;
+  name: string;
+  primary: string;
+  text_color?: string | null;
+  mode: CustomThemeBaseMode;
+  overrides?: CustomThemeColorOverrides;
+  enabled: boolean;
+  sort_order: number;
+}
 export type ViewMode = "card" | "list";
 export type LayoutMode = "full" | "compact";
 export type CompactShortcutParamType = "login" | "theme";
@@ -304,6 +337,7 @@ export interface AppearanceSettings {
   default_agent_view: ViewMode;
   default_layout_mode: LayoutMode;
   compact_shortcut_buttons: CompactShortcutButton[];
+  custom_themes: CustomThemePreset[];
 }
 
 export interface AppearanceUpdate {
@@ -312,6 +346,7 @@ export interface AppearanceUpdate {
   default_agent_view?: ViewMode;
   default_layout_mode?: LayoutMode;
   compact_shortcut_buttons?: CompactShortcutButton[];
+  custom_themes?: CustomThemePreset[];
 }
 
 export async function loadAppearanceSettings(): Promise<AppearanceSettings> {