feat: Unify insights and predictions in /insights page with tabs

Changes:
- Created UnifiedInsightsDashboard component with 2 tabs
- Tab 1: Insights - Shows existing charts, stats, and recent activities
- Tab 2: Predictions - Shows AI-powered predictions for next activities
- Growth Spurt Alert appears at the top when detected
- Child selector for families with multiple children
- Clean tab navigation with Timeline and TrendingUp icons

Features Now Accessible from /insights:
✅ Growth Spurt Detection (appears as alert banner)
✅ Pattern Analysis (feeding, sleep, diaper trends)
✅ AI Predictions (next feeding time, sleep duration, etc.)
✅ Charts and visualizations
✅ Recent activities timeline

User Experience:
- Single page access from bottom navigation (Insights icon)
- No need for separate /analytics page
- All smart AI features visible in one place
- Tab switching for different views

Files Changed:
- app/insights/page.tsx - Updated to use UnifiedInsightsDashboard
- components/features/analytics/UnifiedInsightsDashboard.tsx (new)
  * Manages state for both tabs
  * Loads insights and predictions data
  * Renders Growth Spurt Alert
  * Tab navigation UI

🎯 Result: Users can now easily see all AI insights and predictions
from the Insights menu item in bottom navigation!

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

maternal-web/app/insights/page.tsx

@@ -5,10 +5,10 @@ import { AppShell } from '@/components/layouts/AppShell/AppShell';
 import { ProtectedRoute } from '@/components/common/ProtectedRoute';
 import { LoadingFallback } from '@/components/common/LoadingFallback';
 
-// Lazy load the insights dashboard component
-const InsightsDashboard = lazy(() =>
-  import('@/components/features/analytics/InsightsDashboard').then((mod) => ({
-    default: mod.InsightsDashboard,
+// Lazy load the unified insights dashboard component with tabs
+const UnifiedInsightsDashboard = lazy(() =>
+  import('@/components/features/analytics/UnifiedInsightsDashboard').then((mod) => ({
+    default: mod.UnifiedInsightsDashboard,
   }))
 );
 
@@ -17,7 +17,7 @@ export default function InsightsPage() {
     <ProtectedRoute>
       <AppShell>
         <Suspense fallback={<LoadingFallback variant="page" />}>
-          <InsightsDashboard />
+          <UnifiedInsightsDashboard />
         </Suspense>
       </AppShell>
     </ProtectedRoute>

maternal-web/components/features/analytics/UnifiedInsightsDashboard.tsx

@@ -0,0 +1,192 @@
+'use client';
+
+import { useState, useEffect } from 'react';
+import {
+  Box,
+  Typography,
+  Tabs,
+  Tab,
+  Select,
+  MenuItem,
+  FormControl,
+  InputLabel,
+  CircularProgress,
+  Alert,
+  Grid,
+} from '@mui/material';
+import { Timeline, TrendingUp, Assessment } from '@mui/icons-material';
+import { childrenApi, Child } from '@/lib/api/children';
+import { analyticsApi, PatternInsights, PredictionInsights } from '@/lib/api/analytics';
+import { InsightsDashboard } from './InsightsDashboard';
+import PredictionsCard from './PredictionsCard';
+import GrowthSpurtAlert from './GrowthSpurtAlert';
+import { motion } from 'framer-motion';
+
+interface TabPanelProps {
+  children?: React.ReactNode;
+  index: number;
+  value: number;
+}
+
+function TabPanel(props: TabPanelProps) {
+  const { children, value, index, ...other } = props;
+
+  return (
+    <div
+      role="tabpanel"
+      hidden={value !== index}
+      id={`insights-tabpanel-${index}`}
+      aria-labelledby={`insights-tab-${index}`}
+      {...other}
+    >
+      {value === index && <Box sx={{ pt: 3 }}>{children}</Box>}
+    </div>
+  );
+}
+
+export function UnifiedInsightsDashboard() {
+  const [children, setChildren] = useState<Child[]>([]);
+  const [selectedChildId, setSelectedChildId] = useState<string>('');
+  const [tabValue, setTabValue] = useState(0);
+  const [loading, setLoading] = useState(true);
+  const [insights, setInsights] = useState<PatternInsights | null>(null);
+  const [predictions, setPredictions] = useState<PredictionInsights | null>(null);
+  const [insightsLoading, setInsightsLoading] = useState(false);
+  const [predictionsLoading, setPredictionsLoading] = useState(false);
+  const [days, setDays] = useState<number>(7);
+
+  useEffect(() => {
+    loadChildren();
+  }, []);
+
+  useEffect(() => {
+    if (selectedChildId) {
+      loadInsights();
+      loadPredictions();
+    }
+  }, [selectedChildId, days]);
+
+  const loadChildren = async () => {
+    try {
+      const data = await childrenApi.getChildren();
+      setChildren(data);
+      if (data.length > 0 && !selectedChildId) {
+        setSelectedChildId(data[0].id);
+      }
+    } catch (error) {
+      console.error('Failed to load children:', error);
+    } finally {
+      setLoading(false);
+    }
+  };
+
+  const loadInsights = async () => {
+    if (!selectedChildId) return;
+
+    setInsightsLoading(true);
+    try {
+      const data = await analyticsApi.getInsights(selectedChildId, days);
+      setInsights(data);
+    } catch (error) {
+      console.error('Failed to load insights:', error);
+    } finally {
+      setInsightsLoading(false);
+    }
+  };
+
+  const loadPredictions = async () => {
+    if (!selectedChildId) return;
+
+    setPredictionsLoading(true);
+    try {
+      const data = await analyticsApi.getPredictions(selectedChildId);
+      setPredictions(data);
+    } catch (error) {
+      console.error('Failed to load predictions:', error);
+    } finally {
+      setPredictionsLoading(false);
+    }
+  };
+
+  if (loading) {
+    return (
+      <Box sx={{ display: 'flex', justifyContent: 'center', alignItems: 'center', minHeight: '60vh' }}>
+        <CircularProgress />
+      </Box>
+    );
+  }
+
+  if (children.length === 0) {
+    return (
+      <Box sx={{ p: 3 }}>
+        <Alert severity="info">Add a child to your family to view insights and predictions.</Alert>
+      </Box>
+    );
+  }
+
+  return (
+    <motion.div
+      initial={{ opacity: 0, y: 20 }}
+      animate={{ opacity: 1, y: 0 }}
+      transition={{ duration: 0.5 }}
+    >
+      <Box sx={{ px: { xs: 2, sm: 3 }, py: 3 }}>
+        {/* Header */}
+        <Box sx={{ mb: 3 }}>
+          <Typography variant="h4" gutterBottom fontWeight={600}>
+            Insights & Predictions
+          </Typography>
+          <Typography variant="body2" color="text.secondary">
+            AI-powered insights, patterns, and predictions for your child
+          </Typography>
+        </Box>
+
+        {/* Child Selector */}
+        {children.length > 1 && (
+          <Box sx={{ mb: 3 }}>
+            <FormControl sx={{ minWidth: 200 }}>
+              <InputLabel>Child</InputLabel>
+              <Select
+                value={selectedChildId}
+                label="Child"
+                onChange={(e) => setSelectedChildId(e.target.value)}
+              >
+                {children.map((child) => (
+                  <MenuItem key={child.id} value={child.id}>
+                    {child.name}
+                  </MenuItem>
+                ))}
+              </Select>
+            </FormControl>
+          </Box>
+        )}
+
+        {/* Growth Spurt Alert */}
+        {insights?.growthSpurt && <GrowthSpurtAlert growthSpurt={insights.growthSpurt} />}
+
+        {/* Tabs */}
+        <Box sx={{ borderBottom: 1, borderColor: 'divider', mb: 2 }}>
+          <Tabs value={tabValue} onChange={(e, newValue) => setTabValue(newValue)}>
+            <Tab label="Insights" icon={<Timeline />} iconPosition="start" />
+            <Tab label="Predictions" icon={<TrendingUp />} iconPosition="start" />
+          </Tabs>
+        </Box>
+
+        {/* Tab Panels */}
+        <TabPanel value={tabValue} index={0}>
+          {/* Insights tab shows the existing InsightsDashboard */}
+          <InsightsDashboard />
+        </TabPanel>
+
+        <TabPanel value={tabValue} index={1}>
+          {/* Predictions tab */}
+          <Grid container spacing={3}>
+            <Grid item xs={12}>
+              <PredictionsCard predictions={predictions} loading={predictionsLoading} />
+            </Grid>
+          </Grid>
+        </TabPanel>
+      </Box>
+    </motion.div>
+  );
+}