Clean up authentication troubleshooting artifacts

- Remove debug files: debug-login.js, LOGIN_FIX_SUMMARY.md, CUSTOM_LOGIN_IMPLEMENTATION.md
- Remove sequential-thinking directory (temporary MCP setup)
- Clean up verbose console logging in auth middleware
- Reduce debug output in direct login API while keeping essential logs
- Streamline session management logging
- Update .gitignore to prevent future debug file commits
- Maintain essential error logging and security logs

All authentication functionality remains intact and working.

server/utils/session.ts

@@ -12,12 +12,16 @@ const sessionStore = new Map<string, {
 // Cleanup expired sessions every 5 minutes
 setInterval(() => {
   const now = Date.now();
+  let cleanedCount = 0;
   for (const [sessionId, session] of sessionStore.entries()) {
     if (now > session.expiresAt) {
       sessionStore.delete(sessionId);
-      console.log('🧹 Cleaned up expired session:', sessionId.substring(0, 8) + '...');
+      cleanedCount++;
     }
   }
+  if (cleanedCount > 0) {
+    console.log(`🧹 Cleaned up ${cleanedCount} expired sessions`);
+  }
 }, 5 * 60 * 1000);
 
 export class SessionManager {
@@ -43,9 +47,6 @@ export class SessionManager {
       rememberMe
     });
     
-    console.log(`🍪 Creating session cookie (Remember Me: ${rememberMe}) with session ID: ${sessionId.substring(0, 8)}...`);
-    console.log(`📊 Session store size: ${sessionStore.size} sessions`);
-    
     return serialize(this.cookieName, sessionId, {
       httpOnly: true,
       secure: true,
@@ -57,7 +58,6 @@ export class SessionManager {
 
   getSession(cookieHeader?: string): SessionData | null {
     if (!cookieHeader) {
-      console.log('❌ No cookie header provided');
       return null;
     }
 
@@ -65,21 +65,16 @@ export class SessionManager {
     const sessionId = cookies[this.cookieName];
 
     if (!sessionId) {
-      console.log('❌ No session cookie found');
       return null;
     }
 
-    console.log(`🔍 Looking up session: ${sessionId.substring(0, 8)}...`);
-
     const sessionEntry = sessionStore.get(sessionId);
     if (!sessionEntry) {
-      console.log('❌ Session not found in store');
       return null;
     }
 
     // Check if session is expired
     if (Date.now() > sessionEntry.expiresAt) {
-      console.log('❌ Session expired, removing from store');
       sessionStore.delete(sessionId);
       return null;
     }
@@ -87,7 +82,6 @@ export class SessionManager {
     // Update last activity
     sessionEntry.data.lastActivity = Date.now();
     
-    console.log('✅ Session found and valid for user:', sessionEntry.data.user.email);
     return sessionEntry.data;
   }