fix(editor): protect external SQL files from conflicting changes

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

@@ -0,0 +1,14 @@
+import type { ExternalSqlFileStatus, ExternalSqlFileSnapshot } from "@/lib/backend/tauri";
+import type { ExternalSqlFileVersion, QueryTab } from "@/types/database";
+
+export function externalSqlFileMetadataMatches(version: ExternalSqlFileVersion | undefined, status: ExternalSqlFileStatus): boolean {
+  return !!version && status.kind === "present" && version.sizeBytes === status.sizeBytes && version.modifiedNs === status.modifiedNs;
+}
+
+export function externalSqlFileContentMatchesBaseline(tab: QueryTab, snapshot: ExternalSqlFileSnapshot): boolean {
+  return tab.externalSqlFileVersion?.contentHash === snapshot.version.contentHash || tab.originalSql === snapshot.content;
+}
+
+export function externalSqlFileVersionWasIgnored(tab: QueryTab, snapshot: ExternalSqlFileSnapshot): boolean {
+  return tab.externalSqlIgnoredFileVersion?.contentHash === snapshot.version.contentHash;
+}