feat: Minimiert starten + kein Fenster-Popup bei .cloud Oeffnung

- .cloud Doppelklick oeffnet Datei im Hintergrund ohne das Client-
  Fenster aufzupoppen (war nervig)
- Neue Einstellung "Minimiert starten (direkt im System-Tray)"
  als Checkbox im Einstellungen-Bereich
- Wird in config.json gespeichert, bleibt bei Updates erhalten
- Bei aktiviertem Haken: Client startet unsichtbar im Tray,
  Sync laeuft im Hintergrund, Fenster nur per Tray-Doppelklick

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

clients/desktop/src-tauri/src/lib.rs

@@ -104,6 +104,19 @@ async fn auto_login(state: State<'_, AppState>) -> Result<serde_json::Value, Str
     }))
 }
 
+#[tauri::command]
+fn set_start_minimized(minimized: bool) -> Result<String, String> {
+    let mut config = AppConfig::load();
+    config.start_minimized = minimized;
+    config.save()?;
+    Ok(format!("Minimiert starten: {}", minimized))
+}
+
+#[tauri::command]
+fn get_start_minimized() -> bool {
+    AppConfig::load().start_minimized
+}
+
 // --- Sync Paths ---
 
 #[tauri::command]
@@ -741,11 +754,7 @@ pub fn run() {
                             let path = path.trim().to_string();
                             if !path.is_empty() {
                                 let _ = app_req.emit("open-cloud-file", path);
-                                // Show the window
+                                // Don't show window - user opens it via tray when needed
-                                if let Some(w) = app_req.get_webview_window("main") {
-                                    let _ = w.show();
-                                    let _ = w.set_focus();
-                                }
                             }
                         }
                         std::fs::remove_file(&request_file).ok();
@@ -753,6 +762,14 @@ pub fn run() {
                 }
             });
 
+            // Start minimized if configured
+            let config = AppConfig::load();
+            if config.start_minimized {
+                if let Some(w) = app.get_webview_window("main") {
+                    let _ = w.hide();
+                }
+            }
+
             // Handle .cloud file opened via file association (double-click)
             let args: Vec<String> = std::env::args().collect();
             if args.len() > 1 {
@@ -803,6 +820,8 @@ pub fn run() {
             load_saved_config,
             auto_login,
             login,
+            set_start_minimized,
+            get_start_minimized,
             add_sync_path,
             remove_sync_path,
             get_sync_paths,

clients/desktop/src-tauri/src/sync/config.rs

@@ -11,6 +11,8 @@ pub struct AppConfig {
     pub sync_paths: Vec<SyncPath>,
     #[serde(default)]
     pub auto_start: bool,
+    #[serde(default)]
+    pub start_minimized: bool,
 }
 
 impl AppConfig {

clients/desktop/src/App.vue

@@ -19,6 +19,11 @@ const userInfo = ref(null);
 const fileTree = ref([]);
 const fileChanges = ref([]);
 const autoSyncActive = ref(false);
+const startMinimized = ref(false);
+
+async function saveStartMinimized() {
+  await invoke("set_start_minimized", { minimized: startMinimized.value });
+}
 
 // New sync path form
 const showAddPath = ref(false);
@@ -114,6 +119,7 @@ async function handleLogin() {
     userInfo.value = result;
     screen.value = "main";
     syncStatus.value = `Verbunden als ${result.username}`;
+    startMinimized.value = await invoke("get_start_minimized");
     await loadFileTree();
     await loadSyncPaths();
   } catch (err) {
@@ -236,6 +242,7 @@ onMounted(async () => {
         screen.value = "main";
         syncStatus.value = `Verbunden als ${result.username}`;
         syncPaths.value = (await invoke("get_sync_paths"));
+        startMinimized.value = await invoke("get_start_minimized");
         await loadFileTree();
         // Auto-start sync if paths configured
         if (syncPaths.value.length > 0) {
@@ -461,6 +468,15 @@ onUnmounted(() => { unlistenStatus?.(); unlistenLog?.(); unlistenError?.(); unli
         <h3>Sync-Protokoll</h3>
         <div class="log-list"><div v-for="(m,i) in syncLog" :key="i" class="log-item">{{ m }}</div></div>
       </div>
+
+      <!-- Settings -->
+      <div class="section">
+        <h3>Einstellungen</h3>
+        <label class="checkbox-row">
+          <input type="checkbox" v-model="startMinimized" @change="saveStartMinimized" />
+          Minimiert starten (direkt im System-Tray)
+        </label>
+      </div>
     </div>
   </div>
 </template>
@@ -531,6 +547,7 @@ body{font-family:-apple-system,BlinkMacSystemFont,'Segoe UI',Roboto,sans-serif;f
 .lf-badge.cloud{background:#e3f2fd;color:#1565c0}
 .lf-badge.offline{background:#e8f5e9;color:#2e7d32}
 .lf-size{font-size:.75rem;color:#999;flex-shrink:0}
+.checkbox-row{display:flex;align-items:center;gap:.5rem;font-size:.85rem;cursor:pointer}
 .context-menu{position:fixed;background:#fff;border:1px solid #ddd;border-radius:6px;box-shadow:0 4px 12px rgba(0,0,0,.15);z-index:9999;min-width:200px;padding:.25rem 0}
 .cm-item{padding:.5rem .75rem;cursor:pointer;font-size:.85rem}
 .cm-item:hover{background:#f0f0f0}