diff --git a/.env.guide.md b/.env.guide.md
index 95f47a4c..1503db50 100644
--- a/.env.guide.md
+++ b/.env.guide.md
@@ -99,45 +99,6 @@ NEXT_PUBLIC_KAKAO_JS_KEY=b285223d3e57a6820552018b93805658
 
 ---
 
-## AI Inspector Env Registration
-
-### 1) Web 런타임 (Next.js API Route)
-
-등록 위치:
-- 로컬: `apps/web/.env.local`
-- 배포: Vercel Project > Settings > Environment Variables (Preview/Production)
-
-필수:
-```
-NEXT_PUBLIC_API_SERVER_URL=https://api.<env>.solid-connection.com
-AI_INSPECTOR_FIREBASE_PROJECT_ID=<firebase-project-id>
-AI_INSPECTOR_FIREBASE_CLIENT_EMAIL=<service-account-client-email>
-AI_INSPECTOR_FIREBASE_PRIVATE_KEY="-----BEGIN PRIVATE KEY-----\n...\n-----END PRIVATE KEY-----\n"
-```
-
-선택:
-```
-AI_INSPECTOR_FIRESTORE_COLLECTION=aiInspectorTasks
-```
-
-### 2) Worker (GitHub Actions)
-
-등록 위치:
-- GitHub Repository > Settings > Secrets and variables > Actions > Repository secrets
-
-필수:
-- `AI_INSPECTOR_FIREBASE_PROJECT_ID`
-- `AI_INSPECTOR_FIREBASE_CLIENT_EMAIL`
-- `AI_INSPECTOR_FIREBASE_PRIVATE_KEY`
-
-선택:
-- `AI_INSPECTOR_PATCH_ENDPOINT`
-- `AI_INSPECTOR_PATCH_API_KEY`
-- `AI_INSPECTOR_PREVIEW_URL_TEMPLATE`
-- `AI_INSPECTOR_DISCORD_WEBHOOK_URL`
-
----
-
 ## Best Practices
 
 1. **환경별 값은 Vercel 대시보드에서 관리**
diff --git a/.env.preview b/.env.preview
index b63a2183..dde31a77 100644
--- a/.env.preview
+++ b/.env.preview
@@ -8,3 +8,7 @@ NEXT_PUBLIC_API_SERVER_URL=https://api.stage.solid-connection.com
 
 # kakao
 NEXT_PUBLIC_KAKAO_JS_KEY=c080f1d215a69b47401cda1d7528418a
+
+# Login mode configuration for preview
+# Preview 환경에서는 stage API와 쿠키 로그인 사용
+NEXT_PUBLIC_COOKIE_LOGIN_ENABLED=true
diff --git a/apps/web/public/images/placeholder/profile64.svg b/apps/web/public/images/placeholder/profile64.svg
index 8543a2e7..b457e395 100644
--- a/apps/web/public/images/placeholder/profile64.svg
+++ b/apps/web/public/images/placeholder/profile64.svg
@@ -1,10 +1,9 @@
-<svg width="55" height="54" viewBox="0 0 55 54" fill="none" xmlns="http://www.w3.org/2000/svg">
-<g id="Mask group">
-<mask id="mask0_1126_8520" style="mask-type:alpha" maskUnits="userSpaceOnUse" x="0" y="0" width="55" height="54">
-<circle id="Ellipse 33" cx="27.5" cy="27" r="27" fill="#EFEEFF"/>
-</mask>
-<g mask="url(#mask0_1126_8520)">
-<path id="Vector" d="M27.4995 9.71973C30.2206 9.71973 32.8303 10.8021 34.7544 12.7289C36.6785 14.6556 37.7595 17.2688 37.7595 19.9936C37.7595 22.7184 36.6785 25.3316 34.7544 27.2583C32.8303 29.185 30.2206 30.2674 27.4995 30.2674C24.7784 30.2674 22.1687 29.185 20.2446 27.2583C18.3205 25.3316 17.2395 22.7184 17.2395 19.9936C17.2395 17.2688 18.3205 14.6556 20.2446 12.7289C22.1687 10.8021 24.7784 9.71973 27.4995 9.71973ZM27.4995 35.4043C38.8368 35.4043 48.0195 40.0019 48.0195 45.6782V62.5566C31.9924 68.4274 23.0066 68.4274 6.97949 62.5566V45.6782C6.97949 40.0019 16.1622 35.4043 27.4995 35.4043Z" fill="#837CF8"/>
-</g>
-</g>
+<svg width="86" height="86" viewBox="0 0 86 86" fill="none" xmlns="http://www.w3.org/2000/svg" xmlns:xlink="http://www.w3.org/1999/xlink">
+<circle cx="43" cy="43" r="43" fill="url(#pattern0_1248_7499)"/>
+<defs>
+<pattern id="pattern0_1248_7499" patternContentUnits="objectBoundingBox" width="1" height="1">
+<use xlink:href="#image0_1248_7499" transform="scale(0.00390625)"/>
+</pattern>
+<image id="image0_1248_7499" width="256" height="256" preserveAspectRatio="none" xlink:href="data:image/png;base64,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"/>
+</defs>
 </svg>
diff --git a/apps/web/src/components/ui/ProfileWithBadge.tsx b/apps/web/src/components/ui/ProfileWithBadge.tsx
index 4aa1d63d..48528a05 100644
--- a/apps/web/src/components/ui/ProfileWithBadge.tsx
+++ b/apps/web/src/components/ui/ProfileWithBadge.tsx
@@ -30,7 +30,7 @@ const ProfileWithBadge = ({
       {/* 프로필 이미지 */}
       <div
         className={`h-full w-full overflow-hidden rounded-full ${
-          showMentorBadge ? "border-2 border-primary-1" : "border border-gray-200"
+          showMentorBadge ? "border-2 border-primary-2" : "border-none"
         }`}
       >
         <Image