Fix voice command data structure and prevent duplicate activities

Backend changes:
- Update LLM prompt to use correct field names matching frontend interfaces
  - Use 'diaperType' instead of 'type' for diaper activities
  - Use 'feedingType' instead of 'method' for feeding activities
  - Simplify sleep structure (duration, quality, location only)

Frontend changes:
- Add processedClassificationId tracking to prevent infinite loop
- Create unique ID for each classification to avoid duplicate processing
- Reset processed ID when dialog opens/closes or new recording starts

This fixes the issue where voice commands created multiple duplicate
activities and had mismatched data structures causing tracker warnings.

🤖 Generated with [Claude Code](https://claude.com/claude-code)

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

maternal-app/maternal-app-backend/src/modules/voice/voice.service.ts

@@ -172,23 +172,21 @@ Extract activity details from the user's text and respond ONLY with valid JSON (
   "timestamp": "ISO 8601 datetime if mentioned (e.g., '3pm', '30 minutes ago'), otherwise use current time",
   "details": {
     // For feeding:
+    "feedingType": "bottle|breast|solids",
     "amount": number or null,
     "unit": "ml|oz" or null,
-    "method": "bottle|breast|solids" or null,
-    "side": "left|right|both" or null,
+    "side": "left|right|both" or null (for breastfeeding only),
     "duration": number (minutes) or null,
     "notes": string or null
 
     // For sleep:
-    "start_time": "ISO 8601" or null,
-    "end_time": "ISO 8601" or null,
+    "quality": "peaceful|restless|fussy",
+    "location": "crib|bassinet|arms|bed|stroller|car seat",
     "duration": number (minutes) or null,
-    "quality": "peaceful|restless|fussy" or null,
-    "location": string or null,
     "notes": string or null
 
     // For diaper:
-    "type": "wet|dirty|both",
+    "diaperType": "wet|dirty|both",
     "color": string or null,
     "consistency": string or null,
     "rash": boolean or null,