diff --git a/tab_timeline.py b/tab_timeline.py
index 29e43e7..34ef13c 100644
--- a/tab_timeline.py
+++ b/tab_timeline.py
@@ -1,8 +1,8 @@
 import streamlit as st
 import json
+import graphviz
 from history_tree import HistoryTree
 from utils import save_json
-from streamlit_agraph import agraph, Node, Edge, Config
 
 def render_timeline_tab(data, file_path):
     tree_data = data.get("history_tree", {})
@@ -12,105 +12,50 @@ def render_timeline_tab(data, file_path):
 
     htree = HistoryTree(tree_data)
 
+    # 1. INDICATOR
     if 'restored_indicator' in st.session_state and st.session_state.restored_indicator:
         st.info(f"📍 Editing Restored Version: **{st.session_state.restored_indicator}**")
 
-    # --- 1. BUILD NODES & EDGES ---
-    nodes = []
-    edges = []
-    
-    sorted_nodes = sorted(htree.nodes.values(), key=lambda x: x["timestamp"])
-    
-    for n in sorted_nodes:
-        nid = n["id"]
-        note = n.get('note', 'Step')
-        # Shorten note for the visual bubble
-        short_note = (note[:15] + '..') if len(note) > 15 else note
-        
-        # Styles
-        color = "#ffffff"     # White background
-        border = "#666666"    # Grey border
-        
-        # Current Head
-        if nid == htree.head_id:
-            color = "#fff6cd" # Yellow
-            border = "#eebb00"
-        
-        # Branch Tips
-        if nid in htree.branches.values():
-            if color == "#ffffff": 
-                color = "#e6ffe6" # Green
-                border = "#44aa44"
-
-        nodes.append(Node(
-            id=nid,
-            label=f"{short_note}\n({nid[:4]})",
-            size=25,
-            shape="box",
-            color=color,
-            borderWidth=1,
-            borderColor=border,
-            # Force black text so it's visible on light nodes
-            font={'color': 'black', 'face': 'Arial', 'size': 14}
-        ))
-        
-        if n["parent"] and n["parent"] in htree.nodes:
-            edges.append(Edge(
-                source=n["parent"],
-                target=nid,
-                color="#aaaaaa",
-            ))
-
-    # --- 2. CONFIGURATION (THE FIX) ---
-    config = Config(
-        width="100%",
-        height="500px", # FIXED: Must be a string with 'px'
-        directed=True, 
-        physics=False,  # Keep False for rigid timeline
-        hierarchical=True, 
-        # Detailed Hierarchy Settings to prevent layout collapse
-        layout={
-            "hierarchical": {
-                "enabled": True,
-                "levelSeparation": 150,
-                "nodeSpacing": 100,
-                "treeSpacing": 100,
-                "direction": "LR", # Left to Right
-                "sortMethod": "directed"
-            }
-        }
-    )
-
-    st.subheader("🕰️ Interactive Timeline")
-    st.caption("Scroll to Zoom • Drag to Pan • Click to Inspect")
-    
-    # 3. RENDER
-    # If this still shows black, try changing physics=True briefly
-    clicked_node_id = agraph(nodes=nodes, edges=edges, config=config)
+    # 2. GRAPH (Compact & Clean)
+    st.subheader("🕰️ Version History")
+    try:
+        graph_dot = htree.generate_horizontal_graph()
+        st.graphviz_chart(graph_dot, use_container_width=True)
+    except Exception as e:
+        st.error(f"Graph Error: {e}")
 
     st.markdown("---")
 
-    # 4. INSPECTION LOGIC
-    # Helper list for dropdown
-    all_nodes_list = list(htree.nodes.values())
-    all_nodes_list.sort(key=lambda x: x["timestamp"], reverse=True)
+    # 3. SELECTOR (Navigation)
+    col_sel, col_act = st.columns([3, 1])
     
-    target_node_id = None
+    all_nodes = list(htree.nodes.values())
+    all_nodes.sort(key=lambda x: x["timestamp"], reverse=True) 
     
-    if clicked_node_id:
-        target_node_id = clicked_node_id
-    else:
-        target_node_id = htree.head_id
+    def fmt_node(n):
+        return f"{n.get('note', 'Step')} ({n['id']})"
 
-    if target_node_id and target_node_id in htree.nodes:
-        selected_node = htree.nodes[target_node_id]
+    with col_sel:
+        # Default to Head
+        current_idx = 0
+        for i, n in enumerate(all_nodes):
+            if n["id"] == htree.head_id:
+                current_idx = i
+                break
+                
+        selected_node = st.selectbox(
+            "Inspect Node:", 
+            all_nodes, 
+            format_func=fmt_node,
+            index=current_idx
+        )
+
+    # 4. INSPECTOR
+    if selected_node:
         node_data = selected_node["data"]
-
-        c_h1, c_h2 = st.columns([3, 1])
-        c_h1.markdown(f"### 🔎 Inspecting: {selected_node.get('note', 'Step')}")
-        c_h1.caption(f"ID: {target_node_id}")
-
-        with st.expander(f"Compare with Current State", expanded=True):
+        
+        # --- DIFF VIEWER ---
+        with st.expander(f"🔎 Compare '{selected_node.get('note')}' with Current State", expanded=True):
             diffs = []
             all_keys = set(data.keys()) | set(node_data.keys())
             ignore_keys = {"history_tree", "prompt_history", "batch_data", "ui_reset_token"}
@@ -131,26 +76,28 @@ def render_timeline_tab(data, file_path):
                     dc2.markdown(f"🔴 `{str(v_now)[:30]}`")
                     dc3.markdown(f"🟢 `{str(v_then)[:30]}`")
 
-        with c_h2:
-            st.write("")
-            if st.button("⏪ Restore Version", type="primary", use_container_width=True):
+        # --- ACTIONS ---
+        with col_act:
+            st.write(""); st.write("")
+            if st.button("⏪ Restore", type="primary", use_container_width=True):
                 data.update(node_data)
-                htree.head_id = target_node_id
+                htree.head_id = selected_node['id']
                 
                 data["history_tree"] = htree.to_dict()
                 save_json(file_path, data)
                 
                 st.session_state.ui_reset_token += 1
                 
-                label = f"{selected_node.get('note')} ({target_node_id[:4]})"
+                label = f"{selected_node.get('note')} ({selected_node['id'][:4]})"
                 st.session_state.restored_indicator = label
                 
-                st.toast(f"Restored {target_node_id}!", icon="🔄")
+                st.toast(f"Restored!", icon="🔄")
                 st.rerun()
 
+        # --- RENAME ---
         rn_col1, rn_col2 = st.columns([3, 1])
         new_label = rn_col1.text_input("Rename Label", value=selected_node.get("note", ""))
-        if rn_col2.button("Update"):
+        if rn_col2.button("Update Label"):
             selected_node["note"] = new_label
             data["history_tree"] = htree.to_dict()
             save_json(file_path, data)