feat: refactor bithub viewer and add benchmark workflow

.github/workflows/ci.yml

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+name: CI
+
+on:
+  push:
+    branches:
+      - main
+  pull_request:
+  workflow_dispatch:
+
+permissions:
+  contents: read
+
+jobs:
+  moon:
+    name: Moon check and test
+    runs-on: ubuntu-latest
+    steps:
+      - name: Checkout
+        uses: actions/checkout@v4
+
+      - name: Install MoonBit CLI
+        run: |
+          curl -fsSL https://cli.moonbitlang.com/install/unix.sh | bash
+          echo "$HOME/.moon/bin" >> "$GITHUB_PATH"
+
+      - name: Moon update
+        run: moon update
+
+      - name: Moon check (js)
+        run: moon check --target js
+
+      - name: Moon test (js)
+        run: moon test --target js
+
+  e2e:
+    name: Playwright e2e
+    runs-on: ubuntu-latest
+    needs: moon
+    steps:
+      - name: Checkout
+        uses: actions/checkout@v4
+
+      - name: Setup pnpm
+        uses: pnpm/action-setup@v4
+        with:
+          version: 10
+
+      - name: Setup Node.js
+        uses: actions/setup-node@v4
+        with:
+          node-version: 24
+          cache: pnpm
+
+      - name: Install MoonBit CLI
+        run: |
+          curl -fsSL https://cli.moonbitlang.com/install/unix.sh | bash
+          echo "$HOME/.moon/bin" >> "$GITHUB_PATH"
+
+      - name: Moon update
+        run: moon update
+
+      - name: Install Node dependencies
+        run: pnpm install --frozen-lockfile
+
+      - name: Install Playwright browser
+        run: pnpm exec playwright install --with-deps chromium
+
+      - name: Run Playwright tests
+        run: pnpm test:e2e
+
+  bench:
+    name: Moon benchmark
+    runs-on: ubuntu-latest
+    needs: moon
+    steps:
+      - name: Checkout
+        uses: actions/checkout@v4
+
+      - name: Install MoonBit CLI
+        run: |
+          curl -fsSL https://cli.moonbitlang.com/install/unix.sh | bash
+          echo "$HOME/.moon/bin" >> "$GITHUB_PATH"
+
+      - name: Moon update
+        run: moon update
+
+      - name: Run viewer benchmark (js)
+        run: moon bench -p bit-vcs/bithub/cmd/bithub --target js -f bench_viewer_test.mbt

.gitignore

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+_build/
+target/
+.mooncakes/
+.DS_Store
+node_modules/
+playwright-report/
+test-results/

README.md

@@ -1,2 +1,57 @@
 # bithub
+
+`bit` と連携する GitHub-like UI のための実験リポジトリです。
+
+## Current Direction
+
+- まずは `mars` で実装する
+- `sol` へ引き上げられるように分解点を固定する
+- Cloudflare Workers (JS target) 前提で進める
+
+分解方針は `/Users/mz/ghq/github.com/bit-vcs/bithub/docs/mars-sol-boundary.md` を参照。
+
+## Check
+
+```bash
+moon check --target js
+moon test --target js
+```
+
+## E2E (Playwright)
+
+```bash
+pnpm install
+pnpm test:e2e
+```
+
+## Benchmark
+
+```bash
+moon bench -p bit-vcs/bithub/cmd/bithub --target js -f bench_viewer_test.mbt
+pnpm bench
+moon run src/cmd/bithub_bench --target js -- . 20
+```
+
+- `moon bench`: 標準ベンチハーネス
+- `pnpm bench`: 手早いサマリ表示（デフォルト設定）
+- `moon run ... -- <repo> <iterations>`: 対象リポジトリと反復回数を明示指定
+
+## Local Viewer (`bithub .`)
+
+現在のリポジトリを GitHub 風に閲覧する最小 UI を起動できます。
+
+```bash
+./bithub .        # port 8787
+./bithub . 9000   # custom port
+```
+
+- `/` で `README.md` を優先表示
+- `/blob/<path>` でファイル表示
+- `/issues` で `bit hub` の Issue 一覧表示
+- UI は `mizchi/luna/x/components` ベースの最小構成
+
+## Cloudflare Entrypoint
+
+`/Users/mz/ghq/github.com/bit-vcs/bithub/src/cmd/main/main.mbt` に
+`fetch(request, env, exec_ctx)` を公開し、`@mars.Server::to_handler_with_env` へ委譲する。
 GitHub-like UI interface for bit

bithub

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+#!/usr/bin/env bash
+set -euo pipefail
+
+cd "$(dirname "$0")"
+moon run src/cmd/bithub --target js -- "$@"

docs/mars-sol-boundary.md

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+# Mars/Sol Boundary Notes (bithub)
+
+## Goal
+
+`bithub` は当面 `mars` で機能を作り、`sol` への引き上げ可能性を維持する。
+
+## Design Rule
+
+- `core`:
+  - 画面/機能の契約と純粋ロジック
+  - `mars` / `sol` 依存を入れない
+- `adapters/mars_http`:
+  - `core` を `mars.Server` へ接続する層
+- `cmd/main`:
+  - Cloudflare 向け `fetch` エントリ公開のみ
+  - `@mars.Server::to_handler_with_env` に委譲する
+
+## Migration Intention
+
+将来 `sol` へ寄せる場合は、`core` を温存したまま `adapters/sol_*` を追加し、`mars_http` との差し替えで移行する。
+
+## Current Minimal Contract
+
+- `core.mars_route_specs()`
+- `core.home_text()`
+- `core.healthz_text()`
+
+`mars_http` はこの契約だけに依存する。

e2e/file-viewer.spec.ts

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+import { test, expect } from '@playwright/test';
+
+test('root opens README.md by default', async ({ page }) => {
+  await page.goto('/');
+
+  await expect(page.getByRole('link', { name: /\[\*\] README\.md/ })).toBeVisible();
+  await expect(page.getByRole('heading', { level: 1, name: 'bithub' })).toBeVisible();
+  await expect(page.locator('main')).toContainText('README.md');
+});
+
+test('can open a source file from nav', async ({ page }) => {
+  await page.goto('/');
+
+  await page.getByRole('link', { name: 'src/cmd/bithub/main.mbt' }).click();
+
+  await expect(page).toHaveURL(/\/blob\/src\/cmd\/bithub\/main\.mbt$/);
+  await expect(page.locator('main')).toContainText('fn main');
+});
+
+test('path traversal is rejected', async ({ page }) => {
+  const response = await page.goto('/blob/..%2FREADME.md');
+
+  expect(response).not.toBeNull();
+  expect(response!.status()).toBe(400);
+  await expect(page.locator('main')).toContainText('Invalid path.');
+});
+
+test('issues list page is available', async ({ page }) => {
+  await page.goto('/');
+
+  await page.getByRole('link', { name: 'issues' }).click();
+
+  await expect(page).toHaveURL(/\/issues$/);
+  await expect(page.getByRole('heading', { level: 1, name: 'Issues' })).toBeVisible();
+});
+
+test('issues route works with query string', async ({ page }) => {
+  await page.goto('/issues?state=open');
+
+  await expect(page.getByRole('heading', { level: 1, name: 'Issues' })).toBeVisible();
+});
+
+test('blob route works with query string', async ({ page }) => {
+  const response = await page.goto('/blob/README.md?raw=1');
+
+  expect(response).not.toBeNull();
+  expect(response!.status()).toBe(200);
+  await expect(page.locator('main')).toContainText('README.md');
+});
+
+test('missing blob returns 404 page', async ({ page }) => {
+  const response = await page.goto('/blob/not-found-file.txt');
+
+  expect(response).not.toBeNull();
+  expect(response!.status()).toBe(404);
+  await expect(page.locator('main')).toContainText('File not found');
+});
+
+test('unknown route returns 404 page', async ({ page }) => {
+  const response = await page.goto('/__no_such_route__');
+
+  expect(response).not.toBeNull();
+  expect(response!.status()).toBe(404);
+  await expect(page.locator('main')).toContainText('Route not found.');
+});
+
+test('can navigate back to home from issues page', async ({ page }) => {
+  await page.goto('/issues');
+  await page.getByRole('banner').getByRole('link', { name: 'bithub' }).click();
+
+  await expect(page).toHaveURL(/\/$/);
+  await expect(page.locator('main')).toContainText('README.md');
+});

moon.mod.json

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+{
+  "name": "bit-vcs/bithub",
+  "version": "0.1.0",
+  "deps": {
+    "moonbitlang/async": "0.16.6",
+    "mizchi/mars": "0.3.7",
+    "mizchi/bit": "0.21.2",
+    "mizchi/markdown": "0.4.7",
+    "mizchi/luna": "0.12.3",
+    "moonbitlang/x": "0.4.40",
+    "mizchi/js": "0.10.14"
+  },
+  "readme": "README.md",
+  "repository": "https://github.com/bit-vcs/bithub",
+  "license": "MIT",
+  "keywords": [
+    "bithub",
+    "bit",
+    "mars",
+    "sol"
+  ],
+  "description": "GitHub-like UI backend for bit",
+  "source": "src",
+  "preferred-target": "js"
+}

moon.pkg

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+

package.json

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+{
+  "name": "bit-vcs-bithub",
+  "private": true,
+  "scripts": {
+    "bench": "moon run src/cmd/bithub_bench --target js -- . 20",
+    "test:e2e": "playwright test",
+    "test:e2e:headed": "playwright test --headed",
+    "test:e2e:ui": "playwright test --ui"
+  },
+  "devDependencies": {
+    "@playwright/test": "^1.52.0"
+  }
+}

playwright.config.ts

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+import { defineConfig } from '@playwright/test';
+
+const PORT = 4173;
+
+export default defineConfig({
+  testDir: './e2e',
+  timeout: 30_000,
+  expect: {
+    timeout: 5_000,
+  },
+  use: {
+    baseURL: `http://127.0.0.1:${PORT}`,
+    trace: 'on-first-retry',
+  },
+  webServer: {
+    command: `./bithub . ${PORT}`,
+    url: `http://127.0.0.1:${PORT}`,
+    reuseExistingServer: !process.env.CI,
+    timeout: 120_000,
+  },
+});

src/adapters/mars_http/moon.pkg

@@ -0,0 +1,4 @@
+import {
+  "mizchi/mars" @mars,
+  "bit-vcs/bithub/core" @core,
+}