fix(sql): preserve file associations and list selection

apps/desktop/src/components/sql-file/SqlFileExecutionDialog.retry.spec.ts

@@ -179,6 +179,18 @@ afterEach(() => {
 });
 
 describe("SqlFileExecutionDialog retries", () => {
+  it("does not auto-select the first connection for an unassociated external file", async () => {
+    root = document.createElement("div");
+    document.body.append(root);
+    app = createApp(SqlFileExecutionDialog, { open: true, prefillFilePath: "/tmp/unassociated.sql" });
+    app.mount(root);
+
+    await vi.waitFor(() => expect(mocks.previewSqlFile).toHaveBeenCalledWith("/tmp/unassociated.sql"));
+    expect(mocks.ensureConnected).not.toHaveBeenCalled();
+    expect(mocks.fetchSqlFileTargetOptions).not.toHaveBeenCalled();
+    expect(findButton("sqlFile.execute").disabled).toBe(true);
+  });
+
   it("does not restore a completed run's file summary after an early retry failure", async () => {
     await mountReadyDialog();
     await completeFirstExecution();

apps/desktop/src/components/sql-file/SqlFileExecutionDialog.vue

@@ -196,6 +196,7 @@ function resolveInitialConnectionId() {
   if (props.prefillConnectionId && sqlConnections.value.some((c) => c.id === props.prefillConnectionId)) {
     return props.prefillConnectionId;
   }
+  if (props.prefillFilePath) return "";
   return sqlConnections.value[0]?.id ?? "";
 }