Fix WebSocket authentication and duplicate filters

- Remove mock authentication from authSlice to enable real user login
- Fix WebSocket connection errors by using real JWT tokens
- Consolidate duplicate filters on insights page into single shared filter
- Update InsightsDashboard to accept props instead of managing own state
- Add MUI Grid styling for 20% min-width and centering
- Improve UX with unified filter controls for both insights and predictions

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

@@ -187,9 +187,9 @@ export function UnifiedInsightsDashboard() {
           </Alert>
         )}
 
-        {/* Child Selector */}
-        {children.length > 1 && (
-          <Box sx={{ mb: 3 }}>
+        {/* Shared Filters */}
+        <Box sx={{ mb: 3, display: 'flex', gap: 2, flexWrap: 'wrap', alignItems: 'center' }}>
+          {children.length > 1 && (
             <FormControl sx={{ minWidth: 200 }}>
               <InputLabel>Child</InputLabel>
               <Select
@@ -204,8 +204,20 @@ export function UnifiedInsightsDashboard() {
                 ))}
               </Select>
             </FormControl>
-          </Box>
-        )}
+          )}
+          <FormControl sx={{ minWidth: 150 }}>
+            <InputLabel>Time Period</InputLabel>
+            <Select
+              value={days}
+              label="Time Period"
+              onChange={(e) => setDays(Number(e.target.value))}
+            >
+              <MenuItem value={7}>Last 7 days</MenuItem>
+              <MenuItem value={30}>Last 30 days</MenuItem>
+              <MenuItem value={90}>Last 3 months</MenuItem>
+            </Select>
+          </FormControl>
+        </Box>
 
         {/* Growth Spurt Alert */}
         {insights?.growthSpurt && <GrowthSpurtAlert growthSpurt={insights.growthSpurt} />}
@@ -221,7 +233,7 @@ export function UnifiedInsightsDashboard() {
         {/* Tab Panels */}
         <TabPanel value={tabValue} index={0}>
           {/* Insights tab shows the existing InsightsDashboard */}
-          <InsightsDashboard />
+          <InsightsDashboard selectedChildId={selectedChildId} days={days} />
         </TabPanel>
 
         <TabPanel value={tabValue} index={1}>