feat(notes): add mobile workspace selection

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

@@ -13,6 +13,7 @@ export default function CaptureScreen() {
   const saveDraft = useNotesStore((state: NotesState) => state.saveDraft);
   const workspaces = useWorkspaceStore((state: WorkspaceState) => state.workspaces);
   const activeWorkspaceId = useWorkspaceStore((state: WorkspaceState) => state.activeWorkspaceId);
+  const setActiveWorkspace = useWorkspaceStore((state: WorkspaceState) => state.setActiveWorkspace);
   const activeWorkspaceName =
     workspaces.find((workspace: MobileWorkspace) => workspace.id === activeWorkspaceId)?.name ?? 'Drafts';
 
@@ -22,6 +23,22 @@ export default function CaptureScreen() {
       <Text style={styles.subtitle}>
         Create a lightweight mobile draft in {activeWorkspaceName}. Offline queue wiring comes in a later batch.
       </Text>
+      <View style={styles.workspaceRow}>
+        {workspaces.map((workspace: MobileWorkspace) => {
+          const isActive = workspace.id === activeWorkspaceId;
+          return (
+            <Pressable
+              key={workspace.id}
+              onPress={() => setActiveWorkspace(workspace.id)}
+              style={[styles.workspaceChip, isActive ? styles.workspaceChipActive : null]}
+            >
+              <Text style={[styles.workspaceChipText, isActive ? styles.workspaceChipTextActive : null]}>
+                {workspace.name}
+              </Text>
+            </Pressable>
+          );
+        })}
+      </View>
       <TextInput
         value={title}
         onChangeText={(value: string) => {
@@ -121,6 +138,31 @@ const styles = StyleSheet.create({
     padding: 14,
     gap: 6,
   },
+  workspaceRow: {
+    flexDirection: 'row',
+    flexWrap: 'wrap',
+    gap: 8,
+  },
+  workspaceChip: {
+    borderRadius: 999,
+    borderWidth: 1,
+    borderColor: colors.borderDefault,
+    paddingHorizontal: 12,
+    paddingVertical: 8,
+    backgroundColor: colors.surfaceCard,
+  },
+  workspaceChipActive: {
+    backgroundColor: colors.accentPrimary,
+    borderColor: colors.accentPrimary,
+  },
+  workspaceChipText: {
+    color: colors.textSecondary,
+    fontSize: 13,
+    fontWeight: '600',
+  },
+  workspaceChipTextActive: {
+    color: colors.textPrimary,
+  },
   cardTitle: {
     color: colors.textPrimary,
     fontSize: 16,