feat: add copyright footer with logos for 有音教育 and 艺超音乐

app/templates/base.html

@@ -303,5 +303,6 @@
             });
         });
     </script>
+    {% include 'fragments/copyright_footer.html' %}
 </body>
 </html>

app/templates/fragments/copyright_footer.html

@@ -0,0 +1,20 @@
+<!-- 版权声明 footer -->
+<footer class="bg-light text-center py-4 mt-auto border-top">
+    <div class="container">
+        <!-- 两家合作企业logo -->
+        <div class="d-flex justify-content-center align-items-center gap-4 mb-3">
+            <img src="{{ url_for('static', filename='images/有音-logo和字.png') }}"
+                 alt="有音教育"
+                 style="height: 40px; width: auto;"
+                 loading="lazy">
+            <img src="{{ url_for('static', filename='images/艺超-logo和字.png') }}"
+                 alt="艺超音乐"
+                 style="height: 40px; width: auto;"
+                 loading="lazy">
+        </div>
+        <!-- 版权文字 -->
+        <p class="text-muted small mb-0">
+            &copy; 2024-2026 有音教育 &amp; 艺超音乐 联合开发 | 个性化钢琴教学系统
+        </p>
+    </div>
+</footer>

app/templates/login.html

@@ -90,5 +90,14 @@
             }
         });
     </script>
+    <style>
+        .login-footer { position: fixed; bottom: 0; left: 0; right: 0; background: rgba(255,255,255,0.9); padding: 10px; text-align: center; }
+        .login-footer img { height: 30px; width: auto; }
+    </style>
+    <div class="login-footer">
+        <img src="/static/images/有音-logo和字.png" alt="有音教育" style="height:25px;margin-right:20px;">
+        <img src="/static/images/艺超-logo和字.png" alt="艺超音乐" style="height:25px;">
+        <p class="small text-muted mb-0 mt-1">&copy; 2024-2026 有音教育 &amp; 艺超音乐 联合开发</p>
+    </div>
 </body>
 </html>

app/templates/setup.html

@@ -144,5 +144,14 @@
             }
         });
     </script>
+    <style>
+        .setup-footer { position: fixed; bottom: 0; left: 0; right: 0; background: rgba(255,255,255,0.9); padding: 10px; text-align: center; }
+        .setup-footer img { height: 25px; width: auto; }
+    </style>
+    <div class="setup-footer">
+        <img src="/static/images/有音-logo和字.png" alt="有音教育" style="height:20px;margin-right:15px;">
+        <img src="/static/images/艺超-logo和字.png" alt="艺超音乐" style="height:20px;">
+        <p class="small text-muted mb-0 mt-1">&copy; 2024-2026 有音教育 &amp; 艺超音乐 联合开发</p>
+    </div>
 </body>
 </html>