Add voice command auto-fill and server-side logging

- Add URL parameter reading to diaper tracking page for voice-extracted data
- Add comprehensive server-side logging in voice controller and service
- Log request type (Web Speech API vs MediaRecorder), input text/audio, GPT calls, and classification results
- Enable automatic form pre-filling when voice commands navigate to tracking pages

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

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

maternal-web/app/track/diaper/page.tsx

@@ -39,7 +39,7 @@ import {
   ChildCare,
   Add,
 } from '@mui/icons-material';
-import { useRouter } from 'next/navigation';
+import { useRouter, useSearchParams } from 'next/navigation';
 import { AppShell } from '@/components/layouts/AppShell/AppShell';
 import { ProtectedRoute } from '@/components/common/ProtectedRoute';
 import { useAuth } from '@/lib/auth/AuthContext';
@@ -57,6 +57,7 @@ interface DiaperData {
 
 export default function DiaperTrackPage() {
   const router = useRouter();
+  const searchParams = useSearchParams();
   const { user } = useAuth();
   const [children, setChildren] = useState<Child[]>([]);
   const [selectedChild, setSelectedChild] = useState<string>('');
@@ -108,6 +109,58 @@ export default function DiaperTrackPage() {
     }
   }, [selectedChild]);
 
+  // Pre-fill form from URL parameters (voice command)
+  useEffect(() => {
+    const type = searchParams.get('type');
+    const timestampParam = searchParams.get('timestamp');
+    const notesParam = searchParams.get('notes');
+    const rashParam = searchParams.get('rash');
+    const colorParam = searchParams.get('color');
+    const consistencyParam = searchParams.get('consistency');
+
+    if (type) {
+      // Map backend type values to frontend diaperType
+      const typeMap: Record<string, 'wet' | 'dirty' | 'both' | 'dry'> = {
+        'wet': 'wet',
+        'dirty': 'dirty',
+        'both': 'both',
+        'dry': 'dry',
+      };
+      if (type in typeMap) {
+        setDiaperType(typeMap[type]);
+      }
+    }
+
+    if (timestampParam) {
+      try {
+        const date = new Date(timestampParam);
+        setTimestamp(format(date, "yyyy-MM-dd'T'HH:mm"));
+      } catch (e) {
+        console.warn('[Diaper] Invalid timestamp from URL:', timestampParam);
+      }
+    }
+
+    if (notesParam) {
+      setNotes(notesParam);
+    }
+
+    if (rashParam) {
+      setHasRash(rashParam === 'true');
+    }
+
+    // Map color and consistency to conditions
+    const newConditions: string[] = [];
+    if (colorParam && availableConditions.includes(colorParam)) {
+      newConditions.push(colorParam);
+    }
+    if (consistencyParam && availableConditions.includes(consistencyParam)) {
+      newConditions.push(consistencyParam);
+    }
+    if (newConditions.length > 0) {
+      setConditions(newConditions);
+    }
+  }, [searchParams]);
+
   const loadChildren = async () => {
     if (!familyId) return;
 

maternal-web/components/voice/VoiceFloatingButton.tsx

@@ -143,23 +143,45 @@ export function VoiceFloatingButton() {
       return;
     }
 
-    // Show success message
+    // Handle unknown or low confidence
+    if (result.type === 'unknown' || (result.confidence && result.confidence < 0.3)) {
+      setSnackbar({
+        open: true,
+        message: 'Could not understand the command. Please try again or use manual entry.',
+        severity: 'warning',
+      });
+      return;
+    }
+
+    // Show success message with activity type
+    const activityLabel = result.type.charAt(0).toUpperCase() + result.type.slice(1);
     setSnackbar({
       open: true,
-      message: `Understood: ${result.intent} command`,
+      message: `${activityLabel} activity detected!`,
       severity: 'success',
     });
 
-    // Auto-close dialog and navigate
+    // Auto-close dialog and navigate with pre-filled data
     setTimeout(() => {
       handleClose();
-      if (result.intent === 'feeding') {
-        router.push('/track/feeding');
-      } else if (result.intent === 'sleep') {
-        router.push('/track/sleep');
-      } else if (result.intent === 'diaper') {
-        router.push('/track/diaper');
+
+      // Encode the details as URL parameters for pre-filling the form
+      const params = new URLSearchParams();
+      if (result.details) {
+        Object.entries(result.details).forEach(([key, value]) => {
+          if (value !== null && value !== undefined) {
+            params.set(key, String(value));
+          }
+        });
       }
+      if (result.timestamp) {
+        params.set('timestamp', result.timestamp);
+      }
+
+      const queryString = params.toString();
+      const url = `/track/${result.type}${queryString ? `?${queryString}` : ''}`;
+
+      router.push(url);
     }, 1500);
   };