Update app_enhanced.py

app_enhanced.py

@@ -60,7 +60,8 @@ except Exception as e:
 
 # --- FLASK APP SETUP ---
 app = Flask(__name__)
-app.secret_key = "REPLACE_THIS_WITH_A_SECRET_KEY_IN_PRODUCTION" 
+# Constant secret key ensures sessions survive server restarts if browser keeps cookie
+app.secret_key = "SUPER_SECRET_COMIC_KEY_123" 
 BASE_USER_DIR = "userdata" 
 
 # --- MERGED HTML: UPLOAD UI + EDITOR UI ---
@@ -173,7 +174,7 @@ INDEX_HTML = '''
         .speech-bubble.selected { outline: 2px dashed #4CAF50; }
         .speech-bubble textarea { position: absolute; top: 0; left: 0; width: 100%; height: 100%; box-sizing: border-box; border: 1px solid #4CAF50; background: rgba(255,255,255,0.95); font: inherit; text-align: center; resize: none; padding: 8px; z-index: 102; }
         
-        /* --- SPEECH BUBBLE CSS (EXPORT SAFE - GRADIENT METHOD) --- */
+        /* <<< SPEECH BUBBLE CSS (EXPORT SAFE - GRADIENT METHOD) >>> */
         .speech-bubble.speech {
             --b: 3em; --h: 1.8em; --t: 0.6; --p: var(--tail-pos, 50%); --r: 1.2em; 
             --c: var(--bubble-fill-color, #4ECDC4);
@@ -1009,7 +1010,11 @@ def index():
 
 @app.route('/uploader', methods=['POST'])
 def upload_file():
-    if 'sid' not in session: return jsonify({'success': False, 'message': 'Session expired'}), 400
+    # FIX: Auto-create session if missing due to restart
+    if 'sid' not in session:
+        session['sid'] = uuid.uuid4().hex
+        print(f"⚠️ Session recreated: {session['sid']}")
+    
     try:
         f = request.files['file']
         gen = EnhancedComicGenerator(session['sid'])