refactor: simplify Gradio interface to resolve asset loading issues

- Replace custom theme with default theme
- Remove custom CSS styling
- Simplify component configurations
- Remove unnecessary parameters

app.py

@@ -195,53 +195,7 @@ class ChatInterface:
         """Create the Gradio interface."""
         with gr.Blocks(
             title="Advanced Agentic System",
-            theme=gr.themes.Soft(
-                primary_hue="blue",
-                secondary_hue="indigo",
-                neutral_hue="slate",
-            ),
-            css="""
-                .gradio-container {
-                    max-width: 1200px !important;
-                    margin: auto;
-                    padding: 20px;
-                }
-                .chat-message {
-                    padding: 15px;
-                    border-radius: 12px;
-                    margin-bottom: 12px;
-                    line-height: 1.5;
-                }
-                .user-message {
-                    background-color: var(--neutral-100);
-                    border: 1px solid var(--neutral-200);
-                }
-                .assistant-message {
-                    background-color: var(--primary-50);
-                    border: 1px solid var(--primary-100);
-                }
-                .message-wrap {
-                    max-width: 90%;
-                }
-                .chat-window {
-                    height: 600px;
-                    overflow-y: auto;
-                    padding: 20px;
-                    border-radius: 15px;
-                    border: 1px solid var(--neutral-200);
-                    background: var(--background-fill-primary);
-                }
-                footer {display: none !important;}
-                .gradio-container {min-height: 100vh !important;}
-                .main {
-                    flex-grow: 1;
-                    padding: 2rem;
-                }
-                .message {
-                    padding: 1rem;
-                    margin: 0.5rem 0;
-                }
-            """
+            theme=gr.themes.Default()
         ) as interface:
             gr.Markdown("""
                 # 🤖 Advanced Agentic System Chat Interface
@@ -265,42 +219,28 @@ class ChatInterface:
             chatbot = gr.Chatbot(
                 label="Chat History",
                 height=600,
-                bubble_full_width=False,
                 show_copy_button=True,
-                render_markdown=True,
-                container=True,
-                elem_classes=["chat-window"],
-                type="messages",
-                show_label=False,
+                render_markdown=True
             )
             
             with gr.Row():
                 msg = gr.Textbox(
                     label="Message",
                     placeholder="Chat with the Agentic System...",
-                    lines=2,
-                    max_lines=10,
-                    show_label=False,
-                    container=False,
-                    scale=9
+                    lines=2
                 )
                 submit = gr.Button(
                     "Send 🚀",
-                    scale=1,
                     variant="primary"
                 )
             
-            with gr.Row(equal_height=True):
+            with gr.Row():
                 clear = gr.ClearButton(
                     [msg, chatbot],
-                    value="Clear Chat 🗑️",
-                    variant="secondary",
-                    scale=1
+                    value="Clear Chat 🗑️"
                 )
                 retry = gr.Button(
-                    "Retry Last 🔄",
-                    variant="secondary",
-                    scale=1
+                    "Retry Last 🔄"
                 )
 
             async def respond(message, history):