fix: address Cursor Bugbot review comments

1. test/lib/complete.test.ts: Fix duplicate useTestConfigDir — consolidate
   import to top of file, remove redundant second call added by subagent.
   The existing test-complete- config dir covers all tests including handleComplete.

2. src/commands/issue/merge.ts: Improve hint when user passes --into with
   zero positionals. Previously showed the generic example; now shows a
   targeted message: 'you passed --into X but no positional issue ID.
   Add an issue: sentry issue merge CLI-K9 --into X'

Author: BYK

src/commands/issue/merge.ts

@@ -293,10 +293,15 @@ export const mergeCommand = buildCommand({
       args.length === 1 && flags.into ? [...args, flags.into] : args;
 
     if (effectiveArgs.length < 2) {
-      const hint =
-        args.length === 1
-          ? "Tip: you can also write: sentry issue merge CLI-K9 --into CLI-15H"
-          : "Example: sentry issue merge CLI-K9 CLI-15H CLI-15N";
+      let hint: string;
+      if (args.length === 1) {
+        hint =
+          "Tip: you can also write: sentry issue merge CLI-K9 --into CLI-15H";
+      } else if (args.length === 0 && flags.into) {
+        hint = `Tip: you passed --into ${flags.into} but no positional issue ID. Add an issue to merge:\n  sentry issue merge CLI-K9 --into ${flags.into}`;
+      } else {
+        hint = "Example: sentry issue merge CLI-K9 CLI-15H CLI-15N";
+      }
       throw new ValidationError(
         `'sentry ${COMMAND_PATH}' needs at least 2 issue IDs (got ${args.length}).\n\n` +
           hint

test/lib/complete.test.ts

@@ -20,6 +20,7 @@ import {
   type OrgRegionEntry,
   setOrgRegions,
 } from "../../src/lib/db/regions.js";
+import { useTestConfigDir } from "../helpers.js";
 
 useTestConfigDir("test-complete-");
 
@@ -295,9 +296,8 @@ describe("completeAliases", () => {
 
 import { afterEach, beforeEach, mock } from "bun:test";
 import { handleComplete } from "../../src/lib/complete.js";
-import { useTestConfigDir } from "../helpers.js";
 
-useTestConfigDir("complete-handle-");
+// Note: useTestConfigDir is already called above at line 24 for the whole file
 
 describe("handleComplete", () => {
   let originalWrite: typeof process.stdout.write;