refactor(web/api): errCode + errMessage helpers; 41 sites migrated (W1)

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

@@ -19,6 +19,7 @@
     type SMTPConfig
   } from '$lib/api/admin';
   import { qk } from '$lib/api/queries';
+  import { errCode } from '$lib/api/errors';
   import type { LidarrConfig, LidarrTestResult } from '$lib/api/types';
 
   // Lidarr connection panel. The "saved api key" is masked as "***" on GET —
@@ -112,7 +113,8 @@
       ]);
       apiKeyInput = '';
     } catch (e) {
-      saveError = (e as { code?: string }).code ?? 'save_failed';
+      const code = errCode(e);
+      saveError = code === 'unknown' ? 'save_failed' : code;
     } finally {
       isSaving = false;
     }
@@ -160,7 +162,8 @@
       modalOpen = false;
       disconnectInput = '';
     } catch (e) {
-      disconnectError = (e as { code?: string }).code ?? 'disconnect_failed';
+      const code = errCode(e);
+      disconnectError = code === 'unknown' ? 'disconnect_failed' : code;
     }
   }
 
@@ -270,9 +273,9 @@
       smtpPasswordInput = '';
       showToast('SMTP config saved.');
     } catch (e: unknown) {
-      const code = (e as { code?: string })?.code;
+      const code = errCode(e);
       if (code === 'missing_fields') showToast('Host and from address are required when enabled.');
-      else showToast(`Save failed: ${code ?? 'unknown'}`);
+      else showToast(`Save failed: ${code}`);
     } finally {
       smtpSaving = false;
     }
@@ -284,12 +287,12 @@
       await testSMTPConfig();
       showToast('Test email sent. Check your inbox.');
     } catch (e: unknown) {
-      const code = (e as { code?: string })?.code;
+      const code = errCode(e);
       const message = (e as { message?: string })?.message;
       if (code === 'no_email_on_file') showToast('Set your email in /settings before testing.');
       else if (code === 'not_configured') showToast('Save the SMTP config first.');
       else if (code === 'send_failed') showToast(`Send failed: ${message || 'see server logs'}`);
-      else showToast(`Test failed: ${code ?? 'unknown'}`);
+      else showToast(`Test failed: ${code}`);
     } finally {
       smtpTesting = false;
     }