fix(task-board): a stale card repo must not veto binding the sole repo

apps/api/src/tools/task-board/claude-code-task-run.test.ts

@@ -281,6 +281,16 @@ describe("pickSoleTaskRepo", () => {
       ),
     ).toBeNull();
   });
+  /** The card's `repo` is free text, so it goes stale: a renamed repository, a
+   *  value from the github-connection era, a typo. It must narrow the choice,
+   *  never veto it — an org with exactly one repo bound that repo before this
+   *  parameter existed, and still has to. */
+  test("a preference that matches nothing falls back to the sole repo", () => {
+    const sole = [choice("one", "acme", "web")];
+    expect(pickSoleTaskRepo(sole, "acme/renamed-away")?.id).toBe("one");
+    expect(pickSoleTaskRepo(sole)?.id).toBe("one");
+  });
+
   test("no clonable repo is not eligible", () => {
     expect(pickSoleTaskRepo([])).toBeNull();
   });

apps/api/src/tools/task-board/claude-code-task-run.ts

@@ -75,16 +75,23 @@ export interface TaskRepo {
 export function pickSoleTaskRepo(
   choices: RepoChoice[],
   /** The card's own `repo`, when it has one: narrow to it first, so a
-   *  multi-repo org still binds a checkout before dispatch. An unknown or
-   *  ambiguous name narrows to nothing and falls back to the mid-run pick. */
+   *  multi-repo org still binds a checkout before dispatch.
+   *
+   *  A HINT, never a veto. `repo` is free text that goes stale — a renamed
+   *  repository, a value from the github-connection era, a typo — and letting
+   *  a stale one empty the set would stop binding the sole repo of a
+   *  single-repo org, which this bound before the parameter existed. So a
+   *  preference that matches nothing is discarded, not honored. */
   preferredRepo?: string,
 ): TaskRepo | null {
-  if (preferredRepo)
-    choices = choices.filter(
+  if (preferredRepo) {
+    const narrowed = choices.filter(
       (choice) =>
         `${choice.owner}/${choice.name}`.toLowerCase() ===
         preferredRepo.toLowerCase(),
     );
+    if (narrowed.length > 0) choices = narrowed;
+  }
   if (choices.length !== 1) return null;
   const chosen = choices[0]!;
   return {