feat(settings): settings import/export and WebView2 clipboard history

apps/desktop/src/lib/sql/sqlFormatterConfig.ts

@@ -208,6 +208,21 @@ export function normalizeSqlFormatterSettings(value: unknown): SqlFormatterSetti
   return sqlFormatterOptionSettings(optionSource);
 }
 
+/**
+ * Complete nested-schema check for an already-shaped settings object: every
+ * formatter option must be present with a valid value, and no unknown option
+ * may appear. Unlike the normalizer this never fills defaults, so callers can
+ * reject partially malformed payloads instead of silently substituting them.
+ */
+export function isCompleteSqlFormatterSettings(value: unknown): value is SqlFormatterSettings {
+  if (!isObject(value)) return false;
+  for (const key of SQL_FORMATTER_OPTION_KEYS) {
+    if (!(key in value)) return false;
+    if (!SQL_FORMATTER_OPTION_VALIDATORS[key]((value as Record<string, unknown>)[key])) return false;
+  }
+  return Object.keys(value).every((key) => SQL_FORMATTER_OPTION_KEYS.has(key as keyof SqlFormatterOptionSettings));
+}
+
 export function sqlFormatterConfigFile(settings: unknown): SqlFormatterConfigFile {
   const normalized = normalizeSqlFormatterSettings(settings);
   return {