fix(cd): 修正 Playwright 版本偵測路徑 ../package.json → ./package.json

在 apps/web 目錄執行，../package.json 不存在故每次都回傳 unknown
導致每次部署都重下載 110MB Chromium。
改用 ./package.json 正確讀取 apps/web 的 @playwright/test 版本。

# 2026-04-06 ogt: 節省 CD 約 2 分鐘

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

.gitea/workflows/cd.yaml

@@ -390,7 +390,7 @@ jobs:
           cd apps/web
           # Playwright Chromium 持久化到 /opt/playwright-browsers，版本 hash guard
           export PLAYWRIGHT_BROWSERS_PATH=/opt/playwright-browsers
-          PLAYWRIGHT_VER=$(node -e "console.log(require('../package.json').devDependencies['@playwright/test'] || '')" 2>/dev/null || echo "unknown")
+          PLAYWRIGHT_VER=$(node -e "console.log(require('./package.json').devDependencies['@playwright/test'] || '')" 2>/dev/null || echo "unknown")
           PLAYWRIGHT_HASH_FILE=/opt/playwright-browsers/.version_hash
           if [ "$(cat $PLAYWRIGHT_HASH_FILE 2>/dev/null)" != "$PLAYWRIGHT_VER" ]; then
             echo "📦 Playwright 版本變更 ($PLAYWRIGHT_VER)，重裝 Chromium..."