Fix tab persistence in Claude IDE - persist closed tabs to localStorage

Implement localStorage persistence for closed session and project tabs.
When users close tabs, they now remain closed after page refresh.

Changes:
- session-tabs.js: Add closedSessions tracking with localStorage
- project-manager.js: Add closedProjects tracking with localStorage
- Filter out closed tabs on load
- Persist state whenever tabs are closed

Fixes issue where closed tabs would reappear on page refresh.

Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>

public/claude-ide/session-tabs.js

@@ -21,6 +21,8 @@ class SessionTabs {
         this.sessions = [];
         this.activeSessionId = null;
         this.initialized = false;
+        this.closedSessions = new Set(); // Track closed session IDs
+        this.STORAGE_KEY = 'claude_ide_closed_sessions';
     }
 
     /**
@@ -30,16 +32,48 @@ class SessionTabs {
         if (this.initialized) return;
 
         console.log('[SessionTabs] Initializing...');
+        this.loadClosedSessions();
         this.render();
         this.initialized = true;
     }
 
+    /**
+     * Load closed sessions from localStorage
+     */
+    loadClosedSessions() {
+        try {
+            const stored = localStorage.getItem(this.STORAGE_KEY);
+            if (stored) {
+                const closedIds = JSON.parse(stored);
+                this.closedSessions = new Set(closedIds);
+                console.log('[SessionTabs] Loaded', this.closedSessions.size, 'closed sessions from storage');
+            }
+        } catch (error) {
+            console.error('[SessionTabs] Error loading closed sessions:', error);
+            this.closedSessions = new Set();
+        }
+    }
+
+    /**
+     * Save closed sessions to localStorage
+     */
+    saveClosedSessions() {
+        try {
+            const closedIds = Array.from(this.closedSessions);
+            localStorage.setItem(this.STORAGE_KEY, JSON.stringify(closedIds));
+            console.log('[SessionTabs] Saved', closedIds.length, 'closed sessions to storage');
+        } catch (error) {
+            console.error('[SessionTabs] Error saving closed sessions:', error);
+        }
+    }
+
     /**
      * Set sessions for current project
      */
     setSessions(sessions) {
-        this.sessions = sessions || [];
-        console.log('[SessionTabs] Set', this.sessions.length, 'sessions');
+        // Filter out closed sessions
+        this.sessions = (sessions || []).filter(s => !this.closedSessions.has(s.id));
+        console.log('[SessionTabs] Set', this.sessions.length, 'sessions (filtered out', (sessions || []).length - this.sessions.length, 'closed)');
     }
 
     /**
@@ -191,6 +225,10 @@ class SessionTabs {
 
         console.log('[SessionTabs] Closing session:', sessionId);
 
+        // Add to closed sessions set and persist
+        this.closedSessions.add(sessionId);
+        this.saveClosedSessions();
+
         // Note: This just removes the tab from view
         // The session still exists on the server
         this.sessions = this.sessions.filter(s => s.id !== sessionId);