fix: 将 playwright 移到 production dependencies

问题：Docker 构建时使用 --production 标志，导致 playwright
无法找到

修复：将 @playwright/test 从 devDependencies 移到 dependencies

bun.lock

@@ -5,6 +5,7 @@
     "": {
       "name": "dsas-cca-backend-bun",
       "dependencies": {
+        "@playwright/test": "^1.49.0",
         "axios": "^1.9.0",
         "cors": "^2.8.5",
         "crypto": "^1.0.1",
@@ -16,7 +17,6 @@
         "uuid": "^11.1.0",
       },
       "devDependencies": {
-        "@playwright/test": "^1.49.0",
         "@types/bun": "latest",
         "typescript-language-server": "^5.1.3",
       },

package.json

@@ -11,7 +11,6 @@
     "test:ui": "bunx playwright test --ui"
   },
   "devDependencies": {
-    "@playwright/test": "^1.49.0",
     "@types/bun": "latest",
     "typescript-language-server": "^5.1.3"
   },
@@ -19,6 +18,7 @@
     "typescript": "^5.9.3"
   },
   "dependencies": {
+    "@playwright/test": "^1.49.0",
     "axios": "^1.9.0",
     "cors": "^2.8.5",
     "crypto": "^1.0.1",