feat: M5 背景图上传/压缩+智能取色（FR-A8/A9，smart-color 下沉 shared，canvas 采样→analyzeImage 推导强调色/模糊/表面不透明尊重手动项，持久化+重开恢复）

apps/desktop/src/main/services/config-store.ts

@@ -6,13 +6,13 @@ import { RECENT_VAULT_MAX } from '@hunter/shared';
 
 export class ConfigStore {
   private file: string;
-  private cache: { vault?: VaultMeta; appearance?: { themeId: string; params: Record<string, unknown>; effect: string }; keymaps?: { id: string; combo: string }[] } | null = null;
+  private cache: { vault?: VaultMeta; appearance?: { themeId: string; params: Record<string, unknown>; effect: string; bgImage: string | null }; keymaps?: { id: string; combo: string }[] } | null = null;
 
   constructor(userDataDir: string) {
     this.file = nodePath.join(userDataDir, 'config.json');
   }
 
-  private async read(): Promise<{ vault?: VaultMeta; appearance?: { themeId: string; params: Record<string, unknown>; effect: string }; keymaps?: { id: string; combo: string }[] }> {
+  private async read(): Promise<{ vault?: VaultMeta; appearance?: { themeId: string; params: Record<string, unknown>; effect: string; bgImage: string | null }; keymaps?: { id: string; combo: string }[] }> {
     if (this.cache) return this.cache;
     try {
       const raw = await fs.readFile(this.file, 'utf8');
@@ -46,11 +46,11 @@ export class ConfigStore {
     return meta;
   }
 
-  async getAppearance(): Promise<{ themeId: string; params: Record<string, unknown>; effect: string } | null> {
+  async getAppearance(): Promise<{ themeId: string; params: Record<string, unknown>; effect: string; bgImage: string | null } | null> {
     const c = await this.read();
     return c.appearance ?? null;
   }
-  async saveAppearance(data: { themeId: string; params: Record<string, unknown>; effect: string }): Promise<void> {
+  async saveAppearance(data: { themeId: string; params: Record<string, unknown>; effect: string; bgImage: string | null }): Promise<void> {
     (await this.read()).appearance = data;
     await this.write();
   }

apps/desktop/src/main/services/vault-service.ts

@@ -51,7 +51,7 @@ export class VaultService {
 
   async setDefaultRoot(root: string): Promise<void> { await this.config.setDefaultRoot(root); }
   getAppearance() { return this.config.getAppearance(); }
-  saveAppearance(data: { themeId: string; params: Record<string, unknown>; effect: string }) { return this.config.saveAppearance(data); }
+  saveAppearance(data: { themeId: string; params: Record<string, unknown>; effect: string; bgImage: string | null }) { return this.config.saveAppearance(data); }
   getKeymaps() { return this.config.getKeymaps(); }
   saveKeymaps(data: { id: string; combo: string }[]) { return this.config.saveKeymaps(data); }
 }