fix(web): integrations panel review fixes

- Trim whitespace before checking the typed-confirm value (paste-with-spaces
  was silently keeping the button disabled).
- Wrap onConfirmDisconnect in try/catch and surface disconnect_failed inline
  in the modal — operators on flaky networks now see why nothing happened.
- Invalidate quality-profile + root-folder caches alongside config on both
  save and disconnect, so a base_url change refetches the lists immediately.

web/src/routes/admin/integrations/+page.svelte

@@ -66,7 +66,13 @@
         default_root_folder_path: rootPath
       };
       await putLidarrConfig(cfg);
-      await client.invalidateQueries({ queryKey: qk.lidarrConfig() });
+      // Invalidate config + profile/folder lists. A new base_url means a
+      // different server, so the cached lists must refetch.
+      await Promise.all([
+        client.invalidateQueries({ queryKey: qk.lidarrConfig() }),
+        client.invalidateQueries({ queryKey: qk.lidarrQualityProfiles() }),
+        client.invalidateQueries({ queryKey: qk.lidarrRootFolders() })
+      ]);
       apiKeyInput = '';
     } catch (e) {
       saveError = (e as { code?: string }).code ?? 'save_failed';
@@ -89,28 +95,40 @@
   }
 
   // Disconnect typed-confirm modal. Requires the literal "DISCONNECT" string
-  // to avoid muscle-memory clearing of an integration the operator depends on.
+  // (whitespace-trimmed) to avoid muscle-memory clearing of an integration the
+  // operator depends on.
   let modalOpen = $state(false);
   let disconnectInput = $state('');
-  const canDisconnect = $derived(disconnectInput === 'DISCONNECT');
+  let disconnectError = $state<string | null>(null);
+  const canDisconnect = $derived(disconnectInput.trim() === 'DISCONNECT');
 
   async function onConfirmDisconnect() {
     if (!canDisconnect) return;
-    await putLidarrConfig({
-      enabled: false,
-      base_url: '',
-      api_key: '',
-      default_quality_profile_id: 0,
-      default_root_folder_path: ''
-    });
-    await client.invalidateQueries({ queryKey: qk.lidarrConfig() });
-    modalOpen = false;
-    disconnectInput = '';
+    disconnectError = null;
+    try {
+      await putLidarrConfig({
+        enabled: false,
+        base_url: '',
+        api_key: '',
+        default_quality_profile_id: 0,
+        default_root_folder_path: ''
+      });
+      await Promise.all([
+        client.invalidateQueries({ queryKey: qk.lidarrConfig() }),
+        client.invalidateQueries({ queryKey: qk.lidarrQualityProfiles() }),
+        client.invalidateQueries({ queryKey: qk.lidarrRootFolders() })
+      ]);
+      modalOpen = false;
+      disconnectInput = '';
+    } catch (e) {
+      disconnectError = (e as { code?: string }).code ?? 'disconnect_failed';
+    }
   }
 
   function cancelDisconnect() {
     modalOpen = false;
     disconnectInput = '';
+    disconnectError = null;
   }
 </script>
 
@@ -289,6 +307,9 @@
         aria-label="Type DISCONNECT to confirm"
         class="mt-3 w-full rounded-md border border-border bg-background px-3 py-2 font-mono text-sm text-text-primary placeholder:text-text-muted focus:outline-none focus:ring-2 focus:ring-accent"
       />
+      {#if disconnectError}
+        <p class="mt-2 text-sm text-error">Disconnect failed — {disconnectError}</p>
+      {/if}
       <div class="mt-5 flex justify-end gap-2">
         <button
           type="button"