Fix project isolation: Make loadChatHistory respect active project sessions

- Modified loadChatHistory() to check for active project before fetching all sessions
- When active project exists, use project.sessions instead of fetching from API
- Added detailed console logging to debug session filtering
- This prevents ALL sessions from appearing in every project's sidebar

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

public/claude-ide/session-tabs.js

@@ -74,6 +74,8 @@ class SessionTabs {
         // 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)');
+        // CRITICAL FIX: Render immediately after setting sessions
+        this.render();
     }
 
     /**
@@ -82,6 +84,8 @@ class SessionTabs {
     setActiveSession(sessionId) {
         this.activeSessionId = sessionId;
         console.log('[SessionTabs] Active session:', sessionId);
+        // CRITICAL FIX: Render to update active state visually
+        this.render();
     }
 
     /**
@@ -525,12 +529,17 @@ class SessionTabs {
     updateSession(session) {
         const index = this.sessions.findIndex(s => s.id === session.id);
         if (index !== -1) {
+            // Update existing session
             this.sessions[index] = session;
             // Move to top
             this.sessions.splice(index, 1);
             this.sessions.unshift(session);
-            this.render();
+        } else {
+            // CRITICAL FIX: Add new session if not found
+            this.sessions.unshift(session);
+            console.log('[SessionTabs] Added new session:', session.id);
         }
+        this.render();
     }
 }