feat(core): Add support for transcript_path in hooks for git-ai/Gemini extension (#14663)

Co-authored-by: Christian Gunderman <gundermanc@gmail.com>

packages/core/src/hooks/hookEventHandler.ts

@@ -548,9 +548,16 @@ export class HookEventHandler {
    * Create base hook input with common fields
    */
   private createBaseInput(eventName: HookEventName): HookInput {
+    // Get the transcript path from the ChatRecordingService if available
+    const transcriptPath =
+      this.config
+        .getGeminiClient()
+        ?.getChatRecordingService()
+        ?.getConversationFilePath() ?? '';
+
     return {
       session_id: this.config.getSessionId(),
-      transcript_path: '', // TODO: Implement transcript path when supported
+      transcript_path: transcriptPath,
       cwd: this.config.getWorkingDir(),
       hook_event_name: eventName,
       timestamp: new Date().toISOString(),