[codex] Add multilingual issue preservation coverage (#6069)

## Thinking Path

> - Paperclip orchestrates AI agents for autonomous companies.
> - Agents and board operators coordinate through company-scoped issues,
comments, documents, and heartbeat wake payloads.
> - Chinese, Japanese, and Hindi text needs to survive the full issue
lifecycle without normalization or prompt serialization damage.
> - The riskiest paths are board issue creation, server
issue/comment/document round-tripping, and scoped wake prompt rendering.
> - This pull request adds focused regression coverage across those
surfaces.
> - The benefit is higher confidence that multilingual operators and
agents can create, search, comment on, complete, and wake on issues
using non-Latin text.

## What Changed

- Added adapter-utils wake payload and prompt rendering coverage for
Chinese, Japanese, and Hindi issue/comment text.
- Added UI New Issue dialog coverage proving multilingual title and
description text is submitted unchanged.
- Added server route coverage that round-trips multilingual issue text
through create, search, comments, documents, completion comments, and
heartbeat context.
- Addressed Greptile feedback by using a typed storage mock and
splitting the server route integration path into smaller ordered
assertions.

## Verification

- `pnpm exec vitest run packages/adapter-utils/src/server-utils.test.ts
ui/src/components/NewIssueDialog.test.tsx
server/src/__tests__/multilingual-issues-routes.test.ts`
- Result: 3 test files passed, 51 tests passed.

## Risks

- Low risk: this PR adds regression coverage only and does not change
runtime behavior.
- The new server test uses embedded Postgres support and skips on
unsupported hosts using the existing helper pattern.
- No migrations are included.
- No `pnpm-lock.yaml` changes are included.

> For core feature work, check [`ROADMAP.md`](ROADMAP.md) first and
discuss it in `#dev` before opening the PR. Feature PRs that overlap
with planned core work may need to be redirected - check the roadmap
first. See `CONTRIBUTING.md`.

## Model Used

- OpenAI Codex, GPT-5 based coding agent, with shell, git, Vitest, and
GitHub connector/CLI tool use.

## Checklist

- [x] I have included a thinking path that traces from project context
to this change
- [x] I have specified the model used (with version and capability
details)
- [x] I have checked ROADMAP.md and confirmed this PR does not duplicate
planned core work
- [x] I have run tests locally and they pass
- [x] I have added or updated tests where applicable
- [x] If this change affects the UI, I have included before/after
screenshots
- [x] I have updated relevant documentation to reflect my changes
- [x] I have considered and documented any risks above
- [x] I will address all Greptile and reviewer comments before
requesting merge

packages/adapter-utils/src/server-utils.test.ts

@@ -462,6 +462,50 @@ describe("renderPaperclipWakePrompt", () => {
     expect(prompt).toContain("named unblock owner/action");
   });
 
+  it("preserves Chinese, Japanese, and Hindi issue and comment text in scoped wake prompts", () => {
+    const title = "验证中文任务";
+    const commentBody = [
+      "请用中文回复。",
+      "日本語: 次の手順を書いてください。",
+      "हिन्दी: कृपया स्थिति बताएं।",
+    ].join("\n");
+    const payload = {
+      reason: "issue_commented",
+      issue: {
+        id: "issue-1",
+        identifier: "PAP-9452",
+        title,
+        status: "in_progress",
+        workMode: "standard",
+      },
+      commentIds: ["comment-1"],
+      latestCommentId: "comment-1",
+      commentWindow: { requestedCount: 1, includedCount: 1, missingCount: 0 },
+      comments: [
+        {
+          id: "comment-1",
+          body: commentBody,
+          author: { type: "user", id: "board-user-1" },
+          createdAt: "2026-05-15T16:30:00.000Z",
+        },
+      ],
+      fallbackFetchNeeded: false,
+    };
+
+    const serialized = stringifyPaperclipWakePayload(payload);
+    expect(serialized).toContain(title);
+    expect(serialized).toContain("日本語");
+    expect(serialized).toContain("हिन्दी");
+    expect(JSON.parse(serialized ?? "{}")).toMatchObject({
+      issue: { title },
+      comments: [{ body: commentBody }],
+    });
+
+    const prompt = renderPaperclipWakePrompt(payload);
+    expect(prompt).toContain(`- issue: PAP-9452 ${title}`);
+    expect(prompt).toContain(commentBody);
+  });
+
   it("renders planning-mode directives for assignment and comment wakes", () => {
     const assignmentPrompt = renderPaperclipWakePrompt({
       reason: "issue_assigned",