feat(gui): add dedicated Cache Analytics panel with TTL countdown and clear button

src/gui_2.py

@@ -331,6 +331,8 @@ class App:
       self._render_provider_panel()
      if imgui.collapsing_header("Token Budget"):
       self._render_token_budget_panel()
+     if imgui.collapsing_header("Cache Analytics"):
+      self._render_cache_panel()
      if imgui.collapsing_header("System Prompts"):
       self._render_system_prompts_panel()
 
@@ -1449,6 +1451,39 @@ class App:
    imgui.text_disabled("Anthropic: 4-breakpoint ephemeral caching (auto-managed)")
    imgui.text_disabled(f"  {turns} history turns | Cache reads last call: {cache_reads:,}")
 
+ def _render_cache_panel(self) -> None:
+  if self.current_provider != "gemini":
+   return
+  if not imgui.collapsing_header("Cache Analytics"):
+   return
+  stats = ai_client.get_gemini_cache_stats()
+  if not stats.get("cache_exists"):
+   imgui.text_disabled("No active cache")
+   if imgui.button("Force Cache"):
+    pass
+   return
+  age_sec = stats.get("cache_age_seconds", 0)
+  ttl_remaining = stats.get("ttl_remaining", 0)
+  ttl_total = stats.get("ttl_seconds", 3600)
+  age_str = f"{age_sec/60:.0f}m {age_sec%60:.0f}s"
+  remaining_str = f"{ttl_remaining/60:.0f}m {ttl_remaining%60:.0f}s"
+  ttl_pct = (ttl_remaining / ttl_total * 100) if ttl_total > 0 else 0
+  imgui.text(f"Age: {age_str}")
+  imgui.text(f"TTL: {remaining_str} ({ttl_pct:.0f}%)")
+  color = imgui.ImVec4(0.2, 0.8, 0.2, 1.0)
+  if ttl_pct < 20:
+   color = imgui.ImVec4(1.0, 0.2, 0.2, 1.0)
+  elif ttl_pct < 50:
+   color = imgui.ImVec4(1.0, 0.8, 0.0, 1.0)
+  imgui.push_style_color(imgui.Col_.plot_histogram, color)
+  imgui.progress_bar(ttl_pct / 100.0, imgui.ImVec2(-1, 0), f"{ttl_pct:.0f}%")
+  imgui.pop_style_color()
+  if imgui.button("Clear Cache"):
+   ai_client.cleanup()
+   self._cache_cleared_timestamp = time.time()
+  if hasattr(self, '_cache_cleared_timestamp') and time.time() - self._cache_cleared_timestamp < 5:
+   imgui.text_colored(imgui.ImVec4(0.2, 1.0, 0.2, 1.0), "Cache cleared - will rebuild on next request")
+
  def _render_message_panel(self) -> None:
  # LIVE indicator
   is_live = self.ai_status in ["running powershell...", "fetching url...", "searching web...", "powershell done, awaiting AI..."]