feat: Editor laedt vorhandene Dateien + manueller Code-Toggle (App + Diagnostic)

Editor zeigte "keine Datei", obwohl ARIA schon Dateien geschrieben hatte — er las
NUR den Live-code_file-Stream, nie den Bestand. Jetzt:
- Brain: GET /projects/<id>/files + /file (liest /shared/projects/<id>/, pfad-sicher,
  512KB-Cap). kind in ProjectUpdateBody (PATCH akzeptiert 'code'|'chat').
- App: brainApi.listProjectFiles/readProjectFile/setProjectKind. CodeEditorTile
  holt beim Oeffnen die vorhandene Dateiliste + laedt Inhalt (Live-Version hat
  Vorrang). ProjectsBrowser-Edit: Code-Projekt-Toggle (spiegelt sofort in
  projectFocus → Cockpit-Panels).
- Diagnostic: </> Code-Toggle je Projektzeile + Code-Badge.

py/node/tsc clean.

Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>

android/src/components/ProjectsBrowser.tsx

@@ -28,6 +28,7 @@ import {
 
 import brainApi, { Project } from '../services/brainApi';
 import rvs from '../services/rvs';
+import projectFocus from '../services/projectFocus';
 
 interface Props {
   /** Optional — wenn als Modal genutzt, sonst inline */
@@ -75,6 +76,7 @@ export const ProjectsBrowser: React.FC<Props> = ({ visible = true, onClose, onAc
   const [editing, setEditing] = useState<Project | null>(null);
   const [editName, setEditName] = useState('');
   const [editDesc, setEditDesc] = useState('');
+  const [editKind, setEditKind] = useState<'code' | 'chat'>('chat');
   // Versteckte Projekte standardmaessig ausblenden; Toggle blendet sie
   // temporaer (gedimmt) ein — zum Ansehen/Auswaehlen oder Wieder-Sichtbarmachen.
   const [showHidden, setShowHidden] = useState(false);
@@ -148,18 +150,25 @@ export const ProjectsBrowser: React.FC<Props> = ({ visible = true, onClose, onAc
     setEditing(p);
     setEditName(p.name);
     setEditDesc(p.description || '');
+    setEditKind(p.kind === 'code' ? 'code' : 'chat');
   }, []);
 
   const saveEdit = useCallback(() => {
     if (!editing) return;
-    const patch: Partial<Pick<Project, 'name' | 'description'>> = {};
+    const patch: Partial<Pick<Project, 'name' | 'description' | 'kind'>> = {};
     if (editName.trim() && editName.trim() !== editing.name) patch.name = editName.trim();
     if (editDesc.trim() !== (editing.description || '')) patch.description = editDesc.trim();
+    const curKind = editing.kind === 'code' ? 'code' : 'chat';
+    if (editKind !== curKind) patch.kind = editKind;
     if (Object.keys(patch).length === 0) { setEditing(null); return; }
     brainApi.updateProject(editing.id, patch)
-      .then(() => { setEditing(null); load(); })
+      .then(() => {
+        // Kind sofort in den Workspace spiegeln (Editor/Desktop-Panels).
+        if (patch.kind) projectFocus.setKind(editing.id, patch.kind);
+        setEditing(null); load();
+      })
       .catch(e => Alert.alert('Fehler', String(e?.message || e)));
-  }, [editing, editName, editDesc, load]);
+  }, [editing, editName, editDesc, editKind, load]);
 
   const endProject = useCallback((p: Project) => {
     Alert.alert(`"${p.name}" beenden?`,
@@ -375,6 +384,21 @@ export const ProjectsBrowser: React.FC<Props> = ({ visible = true, onClose, onAc
               style={[s.input, { height: 70 }]}
               multiline
             />
+            <TouchableOpacity
+              onPress={() => setEditKind(k => (k === 'code' ? 'chat' : 'code'))}
+              style={{ flexDirection: 'row', alignItems: 'center', justifyContent: 'space-between', paddingVertical: 8 }}
+            >
+              <Text style={{ color: '#E0E0F0', fontSize: 14 }}>💻 Code-Projekt{'\n'}
+                <Text style={{ color: '#8888AA', fontSize: 11 }}>zeigt Editor + Desktop im Cockpit</Text>
+              </Text>
+              <View style={{
+                width: 46, height: 26, borderRadius: 13, padding: 3,
+                backgroundColor: editKind === 'code' ? '#0096FF' : '#2A2A3E',
+                alignItems: editKind === 'code' ? 'flex-end' : 'flex-start',
+              }}>
+                <View style={{ width: 20, height: 20, borderRadius: 10, backgroundColor: '#FFFFFF' }} />
+              </View>
+            </TouchableOpacity>
             <View style={{ flexDirection: 'row', gap: 8, marginTop: 12 }}>
               <TouchableOpacity onPress={() => setEditing(null)} style={[s.modalBtn, { backgroundColor: '#2A2A3E' }]}>
                 <Text style={s.modalBtnText}>Abbrechen</Text>