feat: HTTP fallback for transcript delivery, updated Teams language selectors

- Auto-detect WebSocket failure and switch to HTTP POST for transcripts/status
- Derive HTTP base URL from WebSocket URL (wss->https, ws->http)
- Updated Teams caption language menu selectors for current UI
- Added: Captions & transcripts, Untertitel und Transkripte, Gesprochene Sprache

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

src/bot/captionsProcedure.ts

@@ -227,13 +227,20 @@ export class CaptionsProcedure {
         await this._openMoreMenu();
         await this._page.waitForTimeout(500);
 
-        // Look for "Language and speech" or "Spoken language" menu item
+        // Look for "Language and speech" or "Captions & transcripts" menu items
+        // Teams has renamed this menu multiple times across versions
         const languageMenuSelectors = [
+          '[data-tid="captions-and-transcripts-button"]',
+          ':has-text("Captions & transcripts")',
+          ':has-text("Captions and transcripts")',
+          ':has-text("Untertitel und Transkripte")',
           ':has-text("Language and speech")',
           ':has-text("Spoken language")',
           ':has-text("Sprache und Spracheingabe")',
+          ':has-text("Gesprochene Sprache")',
           '[data-tid="language-and-speech-button"]',
           'button:has-text("Language")',
+          'button:has-text("Sprache")',
         ];
 
         for (const selector of languageMenuSelectors) {
@@ -257,11 +264,15 @@ export class CaptionsProcedure {
         return;
       }
 
-      // Now look for the "Language settings" sub-option if needed
+      // Now look for the "Language settings" / "Change spoken language" sub-option if needed
       const langSettingsSelectors = [
+        ':has-text("Change spoken language")',
+        ':has-text("Gesprochene Sprache ändern")',
         ':has-text("Language settings")',
         ':has-text("Spracheinstellungen")',
         'button:has-text("Language settings")',
+        'button:has-text("Spoken language")',
+        'button:has-text("Gesprochene Sprache")',
       ];
 
       for (const selector of langSettingsSelectors) {

src/bot/orchestrator.ts

@@ -47,6 +47,8 @@ export class BotOrchestrator {
   private _context: BrowserContext | null = null;
   private _page: Page | null = null;
   private _gatewayWs: WebSocket | null = null;
+  private _useHttpFallback: boolean = false;
+  private _httpBaseUrl: string = '';
 
   private _joinProcedure: JoinProcedure | null = null;
   private _captionsProcedure: CaptionsProcedure | null = null;
@@ -139,11 +141,29 @@ export class BotOrchestrator {
     const wsUrl = this._options.gatewayWsUrl;
     this._logger.info(`Connecting to Gateway: ${wsUrl}`);
 
+    // Derive HTTP base URL from WebSocket URL for fallback
+    this._httpBaseUrl = wsUrl
+      .replace('wss://', 'https://')
+      .replace('ws://', 'http://')
+      .replace(/\/bot\/ws\/.*$/, '');
+
     return new Promise((resolve, reject) => {
       this._gatewayWs = new WebSocket(wsUrl);
 
+      const wsTimeout = setTimeout(() => {
+        if (this._gatewayWs?.readyState !== WebSocket.OPEN) {
+          this._logger.warn('WebSocket connection timeout - switching to HTTP fallback');
+          this._useHttpFallback = true;
+          this._gatewayWs?.close();
+          this._gatewayWs = null;
+          resolve(); // Continue with HTTP fallback instead of failing
+        }
+      }, 10000);
+
       this._gatewayWs.on('open', () => {
-        this._logger.info('Connected to Gateway');
+        clearTimeout(wsTimeout);
+        this._logger.info('Connected to Gateway via WebSocket');
+        this._useHttpFallback = false;
         resolve();
       });
 
@@ -152,23 +172,21 @@ export class BotOrchestrator {
       });
 
       this._gatewayWs.on('close', (code, reason) => {
-        this._logger.warn(`Gateway connection closed: ${code} - ${reason}`);
+        this._logger.warn(`Gateway WebSocket closed: ${code} - ${reason}`);
-        if (!this._isShuttingDown) {
+        if (!this._isShuttingDown && !this._useHttpFallback) {
-          this._setState('error', 'Gateway connection lost');
+          this._logger.info('Switching to HTTP fallback for transcript delivery');
+          this._useHttpFallback = true;
         }
       });
 
       this._gatewayWs.on('error', (error) => {
+        clearTimeout(wsTimeout);
         this._logger.error('Gateway WebSocket error:', error);
-        reject(error);
+        this._logger.info('Switching to HTTP fallback for transcript delivery');
+        this._useHttpFallback = true;
+        this._gatewayWs = null;
+        resolve(); // Continue with HTTP fallback
       });
-
-      // Timeout after 10 seconds
-      setTimeout(() => {
-        if (this._gatewayWs?.readyState !== WebSocket.OPEN) {
-          reject(new Error('Gateway connection timeout'));
-        }
-      }, 10000);
     });
   }
 
@@ -198,18 +216,54 @@ export class BotOrchestrator {
   }
 
   /**
-   * Send a message to the Gateway.
+   * Send a message to the Gateway (WebSocket or HTTP fallback).
    */
   private _sendToGateway(message: object): void {
-    if (!this._gatewayWs || this._gatewayWs.readyState !== WebSocket.OPEN) {
+    if (this._gatewayWs && this._gatewayWs.readyState === WebSocket.OPEN) {
-      this._logger.warn('Cannot send to Gateway - not connected');
+      try {
+        this._gatewayWs.send(JSON.stringify(message));
+        return;
+      } catch (error) {
+        this._logger.error('WebSocket send error, falling back to HTTP:', error);
+        this._useHttpFallback = true;
+      }
+    }
+
+    // HTTP fallback
+    if (this._useHttpFallback) {
+      this._sendViaHttp(message);
+    } else {
+      this._logger.warn('Cannot send to Gateway - no WebSocket and no HTTP fallback');
+    }
+  }
+
+  /**
+   * Send a message via HTTP POST (fallback when WebSocket unavailable).
+   */
+  private async _sendViaHttp(message: any): Promise<void> {
+    const msgType = message.type;
+    let url = '';
+
+    if (msgType === 'transcript') {
+      url = `${this._httpBaseUrl}/bot/transcript/${this._sessionId}`;
+    } else if (msgType === 'status') {
+      url = `${this._httpBaseUrl}/bot/status/${this._sessionId}`;
+    } else {
+      this._logger.debug(`HTTP fallback: unsupported message type ${msgType}`);
       return;
     }
 
     try {
-      this._gatewayWs.send(JSON.stringify(message));
+      const response = await fetch(url, {
+        method: 'POST',
+        headers: { 'Content-Type': 'application/json' },
+        body: JSON.stringify(message),
+      });
+      if (!response.ok) {
+        this._logger.warn(`HTTP fallback response: ${response.status} ${response.statusText}`);
+      }
     } catch (error) {
-      this._logger.error('Error sending to Gateway:', error);
+      this._logger.error(`HTTP fallback error for ${msgType}:`, error);
     }
   }