feat: add bug report issue template and report button on game grid

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

.gitea/issue_template/bug_report.yaml

@@ -0,0 +1,21 @@
+name: Report Bug
+about: Signaler un bug rencontré dans le jeu
+labels:
+  - "type: bug"
+body:
+  - type: input
+    id: game_id
+    attributes:
+      label: Game ID
+      description: L'identifiant de la partie concernée
+      placeholder: "ex: 42"
+    validations:
+      required: false
+  - type: textarea
+    id: description
+    attributes:
+      label: Description
+      description: Décrivez le bug rencontré
+      placeholder: Décrivez ce qui s'est passé et ce que vous attendiez...
+    validations:
+      required: true

assets/styles/app.css

@@ -540,3 +540,30 @@ body {
     padding: 14px 32px;
     font-size: 16px;
 }
+
+/* ── Game footer ── */
+
+.game-footer {
+    display: flex;
+    justify-content: flex-end;
+    margin-top: 8px;
+}
+
+.btn-bug-report {
+    display: inline-flex;
+    align-items: center;
+    gap: 5px;
+    padding: 5px 12px;
+    font-family: 'Inter', sans-serif;
+    font-size: 12px;
+    font-weight: 500;
+    color: var(--text-faint);
+    text-decoration: none;
+    border-radius: 100px;
+    transition: color 0.15s, background 0.15s;
+}
+
+.btn-bug-report:hover {
+    color: var(--orange);
+    background: var(--surface-tint);
+}

templates/homepage/index.html.twig

@@ -15,6 +15,17 @@
                 width: width,
                 middle: middle,
             }) }}></div>
+
+            <div class="game-footer">
+                <a href="https://git.lclr.dev/thibaud-lclr/ltbxd-actorle/issues/new?template=bug_report.yaml&title={{ ('Bug — Game #' ~ game.id)|url_encode }}" class="btn-bug-report" target="_blank" rel="noopener">
+                    <svg width="14" height="14" viewBox="0 0 16 16" fill="none" stroke="currentColor" stroke-width="1.5" stroke-linecap="round" stroke-linejoin="round">
+                        <circle cx="8" cy="8" r="7"/>
+                        <line x1="8" y1="5" x2="8" y2="9"/>
+                        <circle cx="8" cy="11.5" r="0.5" fill="currentColor" stroke="none"/>
+                    </svg>
+                    Signaler un bug
+                </a>
+            </div>
         </div>
     {% else %}
         <div class="game-start-container">