Add Medicine and Activity trackers with voice command support

Added new tracking pages:
- Medicine tracker: track medication name, dosage, unit, route, and reason
- Activity tracker: track play, exercise, walks, music, reading, tummy time, etc.
- Both pages follow existing tracker patterns with recent activities list

Voice command improvements:
- Updated voice classification to support medicine and activity types
- Added detailed extraction fields for medicine (medicineName, dosage, unit, route, reason)
- Added detailed extraction fields for activity (activityType, duration, description)
- Enhanced unknown intent dialog with manual tracker selection
- Updated tracker options to match implemented pages (removed milestone)

Backend changes:
- Added MEDICINE and ACTIVITY to ActivityType enum
- Created migration V013 to add medicine/activity to database CHECK constraint
- Updated voice service prompts to include medicine and activity extraction

Frontend changes:
- Created /track/medicine page with full CRUD operations
- Created /track/activity page with full CRUD operations
- Added Medicine card to /track page with MedicalServices icon
- Updated VoiceFloatingButton unknown dialog with 4 tracker options

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

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

maternal-web/components/voice/VoiceFloatingButton.tsx

@@ -16,9 +16,14 @@ import {
   CircularProgress,
   Chip,
   IconButton,
+  Select,
+  MenuItem,
+  FormControl,
+  InputLabel,
 } from '@mui/material';
 import MicIcon from '@mui/icons-material/Mic';
 import MicOffIcon from '@mui/icons-material/MicOff';
+import AddIcon from '@mui/icons-material/Add';
 import { useRouter } from 'next/navigation';
 import { useVoiceInput } from '@/hooks/useVoiceInput';
 import { useAuth } from '@/lib/auth/AuthContext';
@@ -43,6 +48,8 @@ export function VoiceFloatingButton() {
   const [classificationResult, setClassificationResult] = useState<any>(null);
   const [processedClassificationId, setProcessedClassificationId] = useState<string | null>(null);
   const [showReview, setShowReview] = useState(false);
+  const [showUnknownDialog, setShowUnknownDialog] = useState(false);
+  const [manualTrackingType, setManualTrackingType] = useState<string>('feeding');
   const [snackbar, setSnackbar] = useState<{
     open: boolean;
     message: string;
@@ -91,14 +98,10 @@ export function VoiceFloatingButton() {
         setProcessingStatus(null);
         setShowReview(true);
       } else {
-        // For unknown or low confidence, show error and close dialog
+        // For unknown or low confidence, show unknown dialog
         setProcessingStatus(null);
         setOpen(false);
-        setSnackbar({
-          open: true,
-          message: 'Could not understand the command. Please try again or use manual entry.',
-          severity: 'warning',
-        });
+        setShowUnknownDialog(true);
       }
     }
   }, [classification, isListening, isProcessing, open, transcript, processedClassificationId]);
@@ -295,6 +298,24 @@ export function VoiceFloatingButton() {
     setSnackbar(prev => ({ ...prev, open: false }));
   };
 
+  const handleRetry = () => {
+    setShowUnknownDialog(false);
+    setOpen(true);
+    reset();
+    setClassificationResult(null);
+    setProcessingStatus(null);
+    setProcessedClassificationId(null);
+    // Auto-start listening
+    setTimeout(() => {
+      startListening();
+    }, 300);
+  };
+
+  const handleManualTracking = () => {
+    setShowUnknownDialog(false);
+    router.push(`/track/${manualTrackingType}`);
+  };
+
   return (
     <>
       {/* Floating button positioned in bottom-right */}
@@ -439,6 +460,44 @@ export function VoiceFloatingButton() {
         />
       )}
 
+      {/* Unknown Intent Dialog */}
+      <Dialog open={showUnknownDialog} onClose={() => setShowUnknownDialog(false)} maxWidth="sm" fullWidth>
+        <DialogTitle>Could Not Understand Command</DialogTitle>
+        <DialogContent>
+          <Box sx={{ mb: 3 }}>
+            <Typography variant="body2" color="text.secondary" gutterBottom>
+              You said: "{transcript}"
+            </Typography>
+            <Typography variant="body2" sx={{ mt: 2 }}>
+              I couldn't identify a specific activity from your command. You can either try again or manually add an activity.
+            </Typography>
+          </Box>
+
+          <FormControl fullWidth sx={{ mt: 2 }}>
+            <InputLabel>Activity Type</InputLabel>
+            <Select
+              value={manualTrackingType}
+              onChange={(e) => setManualTrackingType(e.target.value)}
+              label="Activity Type"
+            >
+              <MenuItem value="feeding">Feeding</MenuItem>
+              <MenuItem value="sleep">Sleep</MenuItem>
+              <MenuItem value="diaper">Diaper Change</MenuItem>
+              <MenuItem value="medicine">Medicine</MenuItem>
+            </Select>
+          </FormControl>
+        </DialogContent>
+
+        <DialogActions>
+          <Button onClick={handleRetry} startIcon={<MicIcon />} color="primary">
+            Retry Voice Command
+          </Button>
+          <Button onClick={handleManualTracking} startIcon={<AddIcon />} variant="contained">
+            Add Manual Tracking
+          </Button>
+        </DialogActions>
+      </Dialog>
+
       {/* Snackbar for feedback */}
       <Snackbar
         open={snackbar.open}