fix: ensure permission/stats persist until explicit disconnect (#110)

Also includes cached tokens in cost calculations to provide more accurate billing estimates.

Reviewed-on: #110
Co-authored-by: Naomi Carrigan <commits@nhcarrigan.com>
Co-committed-by: Naomi Carrigan <commits@nhcarrigan.com>

src/lib/components/StatusBar.svelte

@@ -30,7 +30,7 @@
     createSummary,
     sanitizeForJson,
   } from "$lib/utils/conversationUtils";
-  import { updateDiscordRpc } from "$lib/tauri";
+  import { updateDiscordRpc, setSkipNextGreeting } from "$lib/tauri";
 
   const DISCORD_URL = "https://chat.nhcarrigan.com";
   const DONATE_URL = "https://donate.nhcarrigan.com";
@@ -190,6 +190,9 @@
         throw new Error("No active conversation");
       }
       await invoke("stop_claude", { conversationId });
+
+      // Clear granted permissions when user explicitly disconnects
+      claudeStore.revokeAllTools();
     } catch (error) {
       console.error("Failed to stop Claude:", error);
     }
@@ -248,6 +251,9 @@
           : sanitizedContent;
 
       // Step 1: Disconnect from Claude to reset context
+      // Prevent stats reset on reconnection
+      setSkipNextGreeting(true);
+
       if (connectionStatus === "connected") {
         await invoke("stop_claude", { conversationId: activeId });
       }