fix(12-04): add try-catch to JSON.parse in IssueTriagingService

- Wrap JSON.parse in try-catch block
- Provide descriptive error message on parse failure
- Improves error handling for malformed AI triage responses

Author: kunwarVivek

src/services/IssueTriagingService.ts

@@ -59,10 +59,17 @@ export class IssueTriagingService {
 
       const jsonMatch = response.text.match(/\{[\s\S]*\}/);
       if (!jsonMatch) {
-        throw new Error('Failed to parse AI response');
+        throw new Error('Failed to extract JSON from AI triage response');
+      }
+
+      let triage;
+      try {
+        triage = JSON.parse(jsonMatch[0]);
+      } catch (parseError) {
+        const message = parseError instanceof Error ? parseError.message : String(parseError);
+        throw new Error(`Failed to parse triage JSON: ${message}`);
       }
 
-      const triage = JSON.parse(jsonMatch[0]);
       return {
         issueId: params.issueId,
         issueTitle: params.issueTitle,