feat: add refresh button to history tab

Gallery and stats are initialized once at startup and don't auto-refresh.
Added a Refresh button so users can manually reload history after processing.

🤖 Generated with [Claude Code](https://claude.com/claude-code)

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

src/ui/components/history_tab.py

@@ -171,7 +171,7 @@ def create_history_tab():
             search_box = gr.Textbox(
                 label="Search",
                 placeholder="Search by filename...",
-                scale=2,
+                scale=3,
             )
 
             filter_dropdown = gr.Dropdown(
@@ -181,6 +181,8 @@ def create_history_tab():
                 scale=1,
             )
 
+            refresh_btn = gr.Button("Refresh", variant="secondary", scale=1)
+
         with gr.Row():
             # Gallery
             with gr.Column(scale=2):
@@ -253,10 +255,17 @@ def create_history_tab():
             outputs=[gallery, stats_display],
         )
 
+        refresh_btn.click(
+            fn=lambda f: (get_history_gallery(f), get_history_stats()),
+            inputs=[filter_dropdown],
+            outputs=[gallery, stats_display],
+        )
+
     return {
         "gallery": gallery,
         "comparison_slider": comparison_slider,
         "item_details": item_details,
         "stats_display": stats_display,
         "filter_dropdown": filter_dropdown,
+        "refresh_btn": refresh_btn,
     }