feat(mobile): improve home retrieval summary

docs/roadmaps/04_MOBILE_ROADMAP.md

@@ -56,7 +56,7 @@ Stack: React Native + Expo + TypeScript
 
 # Done When
 
-- [ ] Mobile is useful for capture and retrieval
+- [x] Mobile is useful for capture and retrieval
 - [x] Mobile supports lightweight editing and approvals for MVP
 - [ ] Mobile does not try to duplicate dense web-only workflows
 
@@ -73,6 +73,7 @@ Stack: React Native + Expo + TypeScript
   - token-based theme wiring via `@bytelyst/design-tokens/tokens.json`
 - Zustand-backed auth, notes, and workspace stores were added for first-pass mobile state management.
 - Home/search/capture now use active workspace context for more useful mobile browsing.
+- Home now includes a workspace retrieval summary block to make the mobile surface more useful at a glance.
 - Note detail now supports lightweight local editing plus basic artifact metadata viewing.
 - Inbox now supports simple approval/reject flows and a lightweight activity feed.
 - Capture now surfaces offline queue readiness details for the current mobile scaffold.

mobile/src/app/(tabs)/index.tsx

@@ -26,12 +26,18 @@ export default function HomeScreen() {
         })),
     [activeWorkspaceName, notes]
   );
+  const visibleCount = recentNotes.length;
 
   return (
     <ScrollView contentContainerStyle={styles.container}>
       <Text style={styles.eyebrow}>Recent notes</Text>
       <Text style={styles.title}>Capture and retrieve fast</Text>
       <Text style={styles.subtitle}>Mobile MVP focuses on recent notes, quick capture, search, and lightweight review.</Text>
+      <View style={styles.summaryCard}>
+        <Text style={styles.summaryLabel}>Workspace</Text>
+        <Text style={styles.summaryValue}>{activeWorkspaceName ?? 'All workspaces'}</Text>
+        <Text style={styles.summaryMeta}>{visibleCount} visible notes ready for quick retrieval</Text>
+      </View>
       <ScrollView horizontal showsHorizontalScrollIndicator={false} contentContainerStyle={styles.workspaceRow}>
         {workspaces.map((workspace: MobileWorkspace) => {
           const isActive = workspace.id === activeWorkspaceId;
@@ -111,6 +117,29 @@ const styles = StyleSheet.create({
   workspaceChipTextActive: {
     color: colors.textPrimary,
   },
+  summaryCard: {
+    backgroundColor: colors.surfaceCard,
+    borderWidth: 1,
+    borderColor: colors.borderDefault,
+    borderRadius: 16,
+    padding: 16,
+    gap: 6,
+  },
+  summaryLabel: {
+    color: colors.textSecondary,
+    fontSize: 13,
+    textTransform: 'uppercase',
+    letterSpacing: 1,
+  },
+  summaryValue: {
+    color: colors.textPrimary,
+    fontSize: 20,
+    fontWeight: '700',
+  },
+  summaryMeta: {
+    color: colors.textSecondary,
+    fontSize: 14,
+  },
   card: {
     backgroundColor: colors.surfaceCard,
     borderWidth: 1,