feat: public GET /manifest.json from tenant branding

Serve PWA/APK web manifest per domain (name, theme colors, multi-size icons from avatar), exclude from api prefix, and proxy via nginx.

Co-authored-by: Cursor <cursoragent@cursor.com>

src/get-user/get-user.service.ts

@@ -95,6 +95,73 @@ export class GetUserService {
     };
   }
 
+  /**
+   * Web App Manifest برای PWA / ساخت APK — برندینگ همان get_user
+   * GET /manifest.json?domain=
+   */
+  async resolveManifestByHost(hostHeader?: string, domainQuery?: string) {
+    const branding = await this.resolveByHost(hostHeader, domainQuery);
+    const name =
+      String(branding.name_fa || branding.name_en || branding.name || '').trim() ||
+      'App';
+    const themeColor = String(branding.color || '').trim() || '#2563eb';
+    const backgroundColor =
+      String(branding.background_color || '').trim() || '#ffffff';
+    const avatar = this.toAbsoluteIconUrl(branding.avatar);
+
+    if (!avatar) {
+      throw new NotFoundException('tenant avatar required for manifest');
+    }
+
+    const iconType = this.guessImageMime(avatar);
+    const iconSizes = ['1024x1024', '512x512', '192x192', '180x180'] as const;
+
+    return {
+      name,
+      short_name: name,
+      lang: 'fa',
+      dir: 'rtl',
+      start_url: '/',
+      scope: '/',
+      display: 'standalone',
+      background_color: backgroundColor,
+      theme_color: themeColor,
+      description: name,
+      icons: iconSizes.map((sizes) => ({
+        src: avatar,
+        sizes,
+        type: iconType,
+        purpose: 'any',
+      })),
+    };
+  }
+
+  private toAbsoluteIconUrl(raw: unknown): string {
+    const value = String(raw || '').trim();
+    if (!value) return '';
+    if (/^(https?:\/\/|data:)/i.test(value)) return value;
+    if (value.startsWith('//')) return `https:${value}`;
+
+    const publicBase = String(process.env.PUBLIC_API_URL || process.env.APP_URL || '')
+      .trim()
+      .replace(/\/$/, '');
+    if (publicBase && value.startsWith('/')) {
+      return `${publicBase}${value}`;
+    }
+    if (publicBase) {
+      return `${publicBase}/${value.replace(/^\/+/, '')}`;
+    }
+    return value.startsWith('/') ? value : `/${value}`;
+  }
+
+  private guessImageMime(url: string) {
+    const path = url.split('?')[0].toLowerCase();
+    if (path.endsWith('.jpg') || path.endsWith('.jpeg')) return 'image/jpeg';
+    if (path.endsWith('.webp')) return 'image/webp';
+    if (path.endsWith('.svg')) return 'image/svg+xml';
+    return 'image/png';
+  }
+
   private stripKhanegiSaMeta(ui: Record<string, any> | null) {
     if (!ui || typeof ui !== 'object') return ui;
     const { defaultSnapshot: _snap, _backfill, ...rest } = ui;