Volle Mindflux-App ins Deploy-Repo übernehmen

Ersetzt das Hello-World-Gerüst durch die vollständige Anwendung
(com.example.mindflux: 64 Klassen, Thymeleaf-Templates, Static-Assets,
Flyway V1–V6). Deploy-Infrastruktur (.gitea, Dockerfile) bleibt erhalten.

- pom: volle Abhängigkeiten (Security, Thymeleaf, JPA, Flyway), Spring Boot 3.4.4 / Java 17
- docker-compose: SPRING_DATASOURCE_* unverändert; App lauscht auf 8080
  (nginx -> mindflux:8080); Uploads-Volume; Admin-Passwörter via Gitea-Secrets
- Workflow: Deploy-Step injiziert MINDFLUX_ADMIN*_PASSWORD aus Secrets
- .dockerignore ergänzt; Hello-World (com.mindflux) und Test-Datei 'main' entfernt

Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>

src/main/resources/templates/profile.html

@@ -0,0 +1,111 @@
+<!DOCTYPE html>
+<html lang="de" data-theme="dark" xmlns:th="http://www.thymeleaf.org">
+<head>
+  <meta charset="UTF-8">
+  <meta name="viewport" content="width=device-width, initial-scale=1.0">
+  <title>Mindflux – Profil</title>
+  <link rel="stylesheet" href="/css/theme.css">
+  <script src="/js/theme.js"></script>
+  <style>
+    .mf-tab-nav { display:flex; flex-wrap:wrap; gap:.4rem; margin-bottom:1.4rem; }
+    .mf-tab { padding:.55rem .95rem; border-radius:10px; border:1px solid var(--border); color:var(--muted); text-decoration:none; font-size:.85rem; font-weight:700; transition:all .18s ease; }
+    .mf-tab:hover { color:var(--text); background:var(--surface-2); }
+    .mf-tab.active { color:var(--accent-ink); background:linear-gradient(100deg,var(--accent),var(--accent-2)); box-shadow:0 0 18px var(--glow-s); border-color:transparent; }
+    .mf-profile-pic { display:flex; justify-content:center; margin-bottom:1.3rem; }
+    .mf-profile-pic img { width:140px; height:140px; border-radius:50%; object-fit:cover; border:2px solid var(--border-accent); box-shadow:0 0 22px var(--glow-w); }
+    .mf-success { margin-bottom:1.2rem; transition:opacity 1.5s ease; }
+    .mf-footer { text-align:center; color:var(--muted); font-size:.82rem; padding:1.6rem 1rem; }
+    .mf-footer a { color:var(--muted); text-decoration:none; margin:0 .15rem; }
+    .mf-footer a:hover { color:var(--accent); }
+  </style>
+</head>
+<body>
+
+<div class="mf-theme-float"><button class="mf-theme"></button></div>
+
+<div class="mf-container">
+
+  <div class="mf-page-head">
+    <a th:href="@{/dashboard}" class="mf-back">⟵ Zurück zum Dashboard</a>
+  </div>
+  <span class="mf-eyebrow">Mein Profil</span>
+  <h1 style="color:var(--heading); font-size:1.9rem; font-weight:800; margin:.3rem 0 .25rem;">👤 Mein Profil</h1>
+  <p style="color:var(--muted); margin-bottom:1.4rem;">Alles rund um dich und deinen Fortschritt</p>
+
+  <nav class="mf-tab-nav">
+    <a th:href="@{/profile}" class="mf-tab active">Profil</a>
+    <a th:href="@{/progress}" class="mf-tab">Fortschritt</a>
+    <a th:href="@{/profile/achievements}" class="mf-tab">Erfolge</a>
+    <a th:href="@{/soziales}" class="mf-tab">Soziales</a>
+    <a th:href="@{/profile/settings}" class="mf-tab">Einstellungen</a>
+  </nav>
+
+  <!-- Erfolgsmeldung -->
+  <div th:if="${message}" class="mf-panel accent mf-success" id="successMessage">
+    <p th:text="${message}" style="color:var(--accent); margin:0;"></p>
+  </div>
+
+  <div class="mf-panel">
+
+    <!-- Profilbild-Vorschau -->
+    <div class="mf-profile-pic">
+      <img th:src="${user.profilePicture != null and !#strings.isEmpty(user.profilePicture)} ?
+                   @{/uploads/profiles/{file}(file=${user.profilePicture})} :
+                   @{/img/profiles/default-profile.png}"
+           alt="Profilbild">
+    </div>
+
+    <!-- Profil bearbeiten -->
+    <form th:action="@{/profile/update}" method="post" enctype="multipart/form-data">
+      <div class="mf-field">
+        <label class="mf-label">Benutzername</label>
+        <input class="mf-input" type="text" name="username" th:value="${user.username}" readonly>
+      </div>
+
+      <div class="mf-field">
+        <label class="mf-label">E-Mail</label>
+        <input class="mf-input" type="email" name="email" th:value="${user.email}" required>
+      </div>
+
+      <div class="mf-field">
+        <label class="mf-label">Profilbild hochladen</label>
+        <input class="mf-input" type="file" name="profilePicture" accept=".jpg,.jpeg,.png">
+      </div>
+
+      <button type="submit" class="mf-btn">Speichern</button>
+    </form>
+
+    <!-- Profilbild löschen -->
+    <form th:action="@{/profile/delete-picture}" method="post" style="margin-top:1rem;">
+      <button type="submit" class="mf-btn danger">Profilbild entfernen</button>
+    </form>
+
+  </div>
+
+  <footer class="mf-footer">
+    <a href="#">Support</a>
+    <a href="#">Feedback</a>
+    <a href="#">Nutzungsbedingungen</a>
+    <a href="#">Richtlinien</a>
+    <a href="#">Datenschutz</a>
+    <a href="#">Impressum</a>
+  </footer>
+
+</div>
+
+<script>
+  window.addEventListener('DOMContentLoaded', () => {
+    const successMessage = document.getElementById('successMessage');
+    if (successMessage) {
+      setTimeout(() => {
+        successMessage.style.opacity = '0';
+        setTimeout(() => {
+          successMessage.style.display = 'none';
+        }, 1500);
+      }, 3000);
+    }
+  });
+</script>
+
+</body>
+</html>