fix: resolve 6 remaining defects (P2-18, P2-21, P3-04, P3-05, P3-06, P3-02)

- P2-18: TOTP QR code local generation via qrcode lib (no external service)
- P2-21: Suspend foreign LLM providers (OpenAI/Anthropic/Gemini) for early stage
- P3-04: get_progress() now calculates actual percentage from completed/total steps
- P3-05: saveSaaSSession calls now have .catch() error logging
- P3-06: SaaS relay chatStream passes session_key/agent_id to backend
- P3-02: Whiteboard unification plan document created

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

desktop/src/components/Settings/ModelsAPI.tsx

@@ -38,18 +38,20 @@ interface EmbeddingProvider {
 
 // 可用的 Provider 列表
 // 注意: Coding Plan 是专为编程助手设计的优惠套餐，使用专用端点
+// P2-21: 外国模型 (OpenAI, Anthropic, Gemini) 暂停支持，标记为 suspended
 const AVAILABLE_PROVIDERS = [
   // === Coding Plan 专用端点 (推荐用于编程场景) ===
   { id: 'kimi-coding', name: 'Kimi Coding Plan', baseUrl: 'https://api.kimi.com/coding/v1' },
   { id: 'qwen-coding', name: '百炼 Coding Plan', baseUrl: 'https://coding.dashscope.aliyuncs.com/v1' },
   { id: 'zhipu-coding', name: '智谱 GLM Coding Plan', baseUrl: 'https://open.bigmodel.cn/api/coding/paas/v4' },
-  // === 标准 API 端点 ===
+  // === 标准 API 端点 (国内) ===
   { id: 'kimi', name: 'Kimi (标准 API)', baseUrl: 'https://api.moonshot.cn/v1' },
   { id: 'zhipu', name: '智谱 (标准 API)', baseUrl: 'https://open.bigmodel.cn/api/paas/v4' },
   { id: 'qwen', name: '百炼/通义千问 (标准)', baseUrl: 'https://dashscope.aliyuncs.com/compatible-mode/v1' },
   { id: 'deepseek', name: 'DeepSeek', baseUrl: 'https://api.deepseek.com/v1' },
-  { id: 'openai', name: 'OpenAI', baseUrl: 'https://api.openai.com/v1' },
-  { id: 'anthropic', name: 'Anthropic', baseUrl: 'https://api.anthropic.com' },
+  // === 暂停支持 (P2-21: 前期不使用非国内大模型) ===
+  { id: 'openai', name: 'OpenAI (暂停支持)', baseUrl: 'https://api.openai.com/v1', suspended: true },
+  { id: 'anthropic', name: 'Anthropic (暂停支持)', baseUrl: 'https://api.anthropic.com', suspended: true },
   { id: 'custom', name: '自定义', baseUrl: '' },
 ];
 
@@ -663,7 +665,7 @@ export function ModelsAPI() {
                   onChange={(e) => handleProviderChange(e.target.value)}
                   className="w-full px-3 py-2 border border-gray-200 dark:border-gray-600 rounded-lg text-sm bg-white dark:bg-gray-700 text-gray-900 dark:text-white focus:outline-none focus:ring-2 focus:ring-orange-500"
                 >
-                  {AVAILABLE_PROVIDERS.map((p) => (
+                  {AVAILABLE_PROVIDERS.filter((p) => !(p as any).suspended).map((p) => (
                     <option key={p.id} value={p.id}>{p.name}</option>
                   ))}
                 </select>