feat(gui): Display active Gemini caches

This change adds a label to the Provider panel to show the count and total size of active Gemini caches when the Gemini provider is selected. This information is hidden for other providers.

gui.py

@@ -771,6 +771,7 @@ class App:
 
     def _update_telemetry_panel(self):
         """Updates the token budget visualizer in the Provider panel."""
+        # Update history bleed stats for all providers
         stats = ai_client.get_history_bleed_stats()
         if dpg.does_item_exist("token_budget_bar"):
             percentage = stats.get("percentage", 0.0)
@@ -780,6 +781,23 @@ class App:
             limit = stats.get("limit", 0)
             dpg.set_value("token_budget_label", f"{current:,} / {limit:,}")
 
+        # Update Gemini-specific cache stats
+        if dpg.does_item_exist("gemini_cache_label"):
+            if self.current_provider == "gemini":
+                try:
+                    cache_stats = ai_client.get_gemini_cache_stats()
+                    count = cache_stats.get("cache_count", 0)
+                    size_bytes = cache_stats.get("total_size_bytes", 0)
+                    size_kb = size_bytes / 1024.0
+                    text = f"Gemini Caches: {count} ({size_kb:.1f} KB)"
+                    dpg.set_value("gemini_cache_label", text)
+                    dpg.configure_item("gemini_cache_label", show=True)
+                except Exception as e:
+                    # If the API call fails, just hide the label
+                    dpg.configure_item("gemini_cache_label", show=False)
+            else:
+                dpg.configure_item("gemini_cache_label", show=False)
+
     def _append_comms_entry(self, entry: dict, idx: int):
         if not dpg.does_item_exist("comms_scroll"):
             return
@@ -1885,6 +1903,7 @@ class App:
             dpg.add_text("History Token Budget:", color=_LABEL_COLOR)
             dpg.add_progress_bar(tag="token_budget_bar", default_value=0.0, width=-1)
             dpg.add_text("0 / 0", tag="token_budget_label")
+            dpg.add_text("", tag="gemini_cache_label", show=False)
             dpg.add_separator()
             dpg.add_text("Parameters")
             dpg.add_input_float(tag="ai_temperature", label="Temperature", default_value=self.temperature, min_value=0.0, max_value=2.0)