feat: Sessions an Projekt/Workspace binden [appimage]

Sessions werden jetzt nach aktivem Projekt gefiltert (working_dir).
Beim Projektwechsel sieht man nur noch die Sessions die zu diesem
Projekt gehören. Backend: load_sessions_filtered() mit optionalem
WHERE working_dir-Filter. Ohne Projekt: alle Sessions (abwärtskompatibel).

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

src-tauri/src/db.rs

@@ -519,13 +519,12 @@ impl Database {
 
     /// Lädt alle Sessions (neueste zuerst)
     pub fn load_sessions(&self, limit: usize) -> SqlResult<Vec<Session>> {
-        let mut stmt = self.conn.prepare(
-            "SELECT id, claude_session_id, title, working_dir, message_count,
-                    token_input, token_output, cost_usd, status, created_at, updated_at, last_message
-             FROM sessions ORDER BY updated_at DESC LIMIT ?1"
-        )?;
+        self.load_sessions_filtered(limit, None)
+    }
 
-        let sessions = stmt.query_map(params![limit as i64], |row| {
+    /// Sessions laden, optional gefiltert nach working_dir (Projekt-Bindung)
+    pub fn load_sessions_filtered(&self, limit: usize, working_dir: Option<&str>) -> SqlResult<Vec<Session>> {
+        let row_mapper = |row: &rusqlite::Row| -> rusqlite::Result<Session> {
             Ok(Session {
                 id: row.get(0)?,
                 claude_session_id: row.get(1)?,
@@ -540,7 +539,23 @@ impl Database {
                 updated_at: row.get(10)?,
                 last_message: row.get(11)?,
             })
-        })?.collect::<SqlResult<Vec<_>>>()?;
+        };
+
+        let sessions = if let Some(dir) = working_dir {
+            let mut stmt = self.conn.prepare(
+                "SELECT id, claude_session_id, title, working_dir, message_count,
+                        token_input, token_output, cost_usd, status, created_at, updated_at, last_message
+                 FROM sessions WHERE working_dir = ?1 ORDER BY updated_at DESC LIMIT ?2"
+            )?;
+            stmt.query_map(params![dir, limit as i64], row_mapper)?.collect::<SqlResult<Vec<_>>>()?
+        } else {
+            let mut stmt = self.conn.prepare(
+                "SELECT id, claude_session_id, title, working_dir, message_count,
+                        token_input, token_output, cost_usd, status, created_at, updated_at, last_message
+                 FROM sessions ORDER BY updated_at DESC LIMIT ?1"
+            )?;
+            stmt.query_map(params![limit as i64], row_mapper)?.collect::<SqlResult<Vec<_>>>()?
+        };
 
         Ok(sessions)
     }

src-tauri/src/session.rs

@@ -53,16 +53,17 @@ pub async fn update_session(
     db.update_session(&session).map_err(|e| e.to_string())
 }
 
-/// Alle Sessions laden
+/// Alle Sessions laden (optional gefiltert nach working_dir)
 #[tauri::command]
 pub async fn list_sessions(
     app: AppHandle,
     limit: Option<usize>,
+    working_dir: Option<String>,
 ) -> Result<Vec<Session>, String> {
     let limit = limit.unwrap_or(50);
     let state = app.state::<Arc<Mutex<db::Database>>>();
     let db = state.lock().unwrap();
-    db.load_sessions(limit).map_err(|e| e.to_string())
+    db.load_sessions_filtered(limit, working_dir.as_deref()).map_err(|e| e.to_string())
 }
 
 /// Session nach ID laden

src/lib/components/SessionList.svelte

@@ -110,7 +110,7 @@
 			activeProject = project;
 			showProjectList = false;
 			console.log(`📂 Projekt gewechselt: ${project.name} → ${project.working_dir}`);
-			// Sessions neu laden (gefiltert nach Projekt wäre Zukunftsmusik)
+			// Sessions gefiltert nach Projekt-Verzeichnis laden
 			await loadSessions();
 		} catch (err) {
 			console.error('Fehler beim Projektwechsel:', err);
@@ -131,9 +131,20 @@
 
 	async function loadSessions() {
 		try {
-			sessions = await invoke('list_sessions', { limit: 50 });
+			// Sessions nach aktivem Projekt filtern (working_dir)
+			const workingDir = activeProject?.working_dir ?? undefined;
+			sessions = await invoke('list_sessions', { limit: 50, workingDir: workingDir });
 			const active: Session | null = await invoke('get_active_session');
-			activeSessionId = active?.id || null;
+
+			// Prüfen ob aktive Session zum aktuellen Projekt gehört
+			if (active && (!workingDir || active.working_dir === workingDir)) {
+				activeSessionId = active.id;
+			} else if (sessions.length > 0) {
+				// Erste Session des Projekts aktivieren
+				activeSessionId = sessions[0].id;
+			} else {
+				activeSessionId = null;
+			}
 			$currentSessionId = activeSessionId;
 
 			// Wenn aktive Session existiert, Nachrichten laden