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/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);
   };