[jules] ux: Complete skeleton loading for HomeScreen groups

.Jules/changelog.md

@@ -7,6 +7,14 @@
 ## [Unreleased]
 
 ### Added
+- **Mobile Skeleton Loading:** Implemented skeleton loading state for the Home screen groups list.
+  - **Features:**
+    - Created reusable `Skeleton` component with pulsing opacity animation.
+    - Created `GroupListSkeleton` component matching `HapticCard` layout (Avatar, Title, Status).
+    - Replaced generic `ActivityIndicator` with skeleton list for better perceived performance.
+    - Dual-theme support using `react-native-paper`'s surface variant colors.
+  - **Technical:** Created `mobile/components/ui/Skeleton.js` and `mobile/components/skeletons/GroupListSkeleton.js`. Updated `mobile/screens/HomeScreen.js`.
+
 - **Password Strength Meter:** Added a visual password strength indicator to the signup form.
   - **Features:**
     - Real-time strength calculation (Length, Uppercase, Lowercase, Number, Symbol).

.Jules/knowledge.md

@@ -299,6 +299,21 @@ Commonly used components:
 - `<Portal>` and `<Modal>` for overlays
 - `<ActivityIndicator>` for loading states
 
+### Skeleton Loading Pattern
+
+**Date:** 2026-02-14
+**Context:** Implementing skeleton loading for Card components
+
+To perfectly match `Card` layout in skeletons, you can pass `Skeleton` components directly to `Card.Title` props:
+
+```javascript
+<Card.Title
+  title={<Skeleton width="60%" height={20} />}
+  left={(props) => <Skeleton width={props.size} height={props.size} borderRadius={props.size/2} />}
+/>
+```
+This ensures the skeleton aligns exactly with the content state.
+
 ### Safe Area Pattern
 
 **Date:** 2026-01-01

.Jules/todo.md

@@ -57,11 +57,12 @@
   - Impact: Native feel, users can easily refresh data
   - Size: ~150 lines
 
-- [ ] **[ux]** Complete skeleton loading for HomeScreen groups
-  - File: `mobile/screens/HomeScreen.js`
-  - Context: Replace ActivityIndicator with skeleton group cards
-  - Impact: Better loading experience, less jarring
-  - Size: ~40 lines
+- [x] **[ux]** Complete skeleton loading for HomeScreen groups
+  - Completed: 2026-02-14
+  - Files modified: `mobile/screens/HomeScreen.js`, `mobile/components/skeletons/GroupListSkeleton.js`, `mobile/components/ui/Skeleton.js`
+  - Context: Created reusable Skeleton component and GroupListSkeleton. Replaced ActivityIndicator.
+  - Impact: Professional loading experience that mimics actual content layout
+  - Size: ~70 lines
   - Added: 2026-01-01
 
 - [x] **[a11y]** Complete accessibility labels for all screens

mobile/components/skeletons/GroupListSkeleton.js

@@ -0,0 +1,54 @@
+import React from 'react';
+import { View, StyleSheet } from 'react-native';
+import { Card } from 'react-native-paper';
+import Skeleton from '../ui/Skeleton';
+
+const GroupListSkeleton = () => {
+  return (
+    <View
+      style={styles.container}
+      accessible={true}
+      accessibilityLabel="Loading groups"
+      accessibilityRole="progressbar"
+    >
+      {[...Array(6)].map((_, index) => (
+        <Card key={index} style={styles.card}>
+          <Card.Title
+            title={
+              <Skeleton width="60%" height={20} borderRadius={4} />
+            }
+            left={(props) => (
+              <Skeleton
+                width={props.size}
+                height={props.size}
+                borderRadius={props.size / 2}
+              />
+            )}
+          />
+          <Card.Content>
+            <Skeleton
+              width="80%"
+              height={16}
+              borderRadius={4}
+              style={styles.status}
+            />
+          </Card.Content>
+        </Card>
+      ))}
+    </View>
+  );
+};
+
+const styles = StyleSheet.create({
+  container: {
+    padding: 16,
+  },
+  card: {
+    marginBottom: 16,
+  },
+  status: {
+    marginTop: 4,
+  },
+});
+
+export default GroupListSkeleton;

mobile/components/ui/Skeleton.js

@@ -0,0 +1,45 @@
+import React, { useEffect, useRef } from 'react';
+import { Animated } from 'react-native';
+import { useTheme } from 'react-native-paper';
+
+const Skeleton = ({ width, height, borderRadius = 4, style }) => {
+  const theme = useTheme();
+  const opacity = useRef(new Animated.Value(0.3)).current;
+
+  useEffect(() => {
+    const animation = Animated.loop(
+      Animated.sequence([
+        Animated.timing(opacity, {
+          toValue: 0.7,
+          duration: 800,
+          useNativeDriver: true,
+        }),
+        Animated.timing(opacity, {
+          toValue: 0.3,
+          duration: 800,
+          useNativeDriver: true,
+        }),
+      ])
+    );
+    animation.start();
+
+    return () => animation.stop();
+  }, [opacity]);
+
+  return (
+    <Animated.View
+      style={[
+        {
+          width,
+          height,
+          borderRadius,
+          backgroundColor: theme.colors.surfaceVariant,
+          opacity,
+        },
+        style,
+      ]}
+    />
+  );
+};
+
+export default Skeleton;

mobile/screens/HomeScreen.js

@@ -1,7 +1,6 @@
 import { useContext, useEffect, useState } from "react";
 import { Alert, FlatList, RefreshControl, StyleSheet, View } from "react-native";
 import {
-  ActivityIndicator,
   Appbar,
   Avatar,
   Modal,
@@ -10,6 +9,7 @@ import {
   TextInput,
   useTheme,
 } from "react-native-paper";
+import GroupListSkeleton from '../components/skeletons/GroupListSkeleton';
 import HapticButton from '../components/ui/HapticButton';
 import HapticCard from '../components/ui/HapticCard';
 import { HapticAppbarAction } from '../components/ui/HapticAppbar';
@@ -257,9 +257,7 @@ const HomeScreen = ({ navigation }) => {
       </Appbar.Header>
 
       {isLoading ? (
-        <View style={styles.loaderContainer}>
-          <ActivityIndicator size="large" />
-        </View>
+        <GroupListSkeleton />
       ) : (
         <FlatList
           data={groups}
@@ -289,11 +287,6 @@ const styles = StyleSheet.create({
   container: {
     flex: 1,
   },
-  loaderContainer: {
-    flex: 1,
-    justifyContent: "center",
-    alignItems: "center",
-  },
   list: {
     padding: 16,
   },