fix(multi): header logo dark + Manager login JSON + Jenkinsfile manual exclude

Header.jsx:
- logo: zioinfo-logo.png -> zioinfo-logo-dark.png (dark header background)

GuardiaDetail.jsx:
- 12 features (RPA, scraping, DR, CSAP, NL commands added)
- 44 bot commands (vs 19 before)
- Tech stack: Vector DB section added

Jenkinsfile (root + zioinfo-web):
- sparse checkout: exclude manual/ from Jenkins build
- only frontend/ and backend/ checked out

Manager useAuth.ts:
- login: form-encoded -> JSON (ITSM accepts JSON only)

Manuals:
- 41_zio서버_DB_연결정보.md
- 42_zio서버_소프트웨어_구성도.md

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

frontend/src/hooks/useAuth.ts

@@ -19,10 +19,11 @@ export function useAuth() {
   }, [])
 
   const login = async (username: string, password: string) => {
-    const params = new URLSearchParams({ username, password })
-    const r = await guardiaApi.post('/api/auth/login', params, {
-      headers: { 'Content-Type': 'application/x-www-form-urlencoded' }
-    })
+    // JSON 방식 (ITSM은 JSON 로그인만 지원)
+    const r = await guardiaApi.post('/api/auth/login',
+      { username, password },
+      { headers: { 'Content-Type': 'application/json' } }
+    )
     const { access_token } = r.data
     sessionStorage.setItem('gm_token', access_token)
     const me = await guardiaApi.get('/api/auth/me')