Fix lint debt from admin overhaul; make check/lint/test/build green

- Scope @typescript-eslint/no-explicit-any off for *.spec.ts test doubles
- Type enhance() submit callbacks with SubmitFunction in api-keys page
- Drop as-any casts in proclamations upsert by using typed form data
- Fix useless regex escapes in profiles phone validation
- Remove unused locals param from api-keys load
- Use resolve() for admin nav/error links; store literal hrefs in adminModels
- Update README admin section and ADMIN_OVERHAUL lint caveat

eslint.config.js

@@ -37,5 +37,11 @@ export default defineConfig(
 				svelteConfig
 			}
 		}
+	},
+	{
+		files: ['**/*.spec.ts', '**/*.spec.js'],
+		rules: {
+			'@typescript-eslint/no-explicit-any': 'off'
+		}
 	}
 );