docs(c4): accuracy audit — split L3 diagrams, add 6 new sub-diagrams, fix all stale content #448

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marcel merged 27 commits from docs/post-refactor-accuracy-audit into main 2026-05-06 20:00:16 +02:00
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@@ -517,12 +517,12 @@ sequenceDiagram
participant Backend as Backend (Spring Boot)
participant DB as PostgreSQL
User->>Browser: Enter username + password
User->>Browser: Enter email + password
Browser->>Frontend: POST /login (form action)
Frontend->>Frontend: Base64 encode "user:password"
Frontend->>Frontend: Base64 encode "email:password"
Frontend->>Backend: GET /api/users/me<br/>Authorization: Basic <token>
Backend->>Backend: Spring Security parses Basic Auth
Backend->>DB: SELECT user WHERE username=?
Backend->>DB: SELECT user WHERE email=?
DB-->>Backend: AppUser + groups + permissions
Backend->>Backend: BCrypt.matches(password, hash)
Backend-->>Frontend: 200 OK — UserDTO