fix(ui): Phase 7 C5 — 移除假按钮 + 真实托盘图标

用户报告设置页很多按钮无反应 + 关闭后托盘看不到图标。两处问题：\n\n1. ServerCard 占位按钮无回调：\n- server-card.slint：去掉了 toggled/edit-clicked/remove-clicked 三个回调以及 enabled 切换、Edit / Remove 按钮；变成纯展示卡（状态点 + name + url + 当前标记）\n- settings-page.slint：去掉硬编码的 Home / NAS 占位，改用 active-server-name / active-server-url / active-server-enabled 三个属性（MainWindow → AppConfig 实时填充）；空时显示 '（未配置服务器）' 空态提示\n- app.slint：MainWindow 加三个属性 + 转发给 SettingsPage\n- lib.rs：startup 阶段把活跃服务器信息塞进 UI；测试连接成功/失败时更新 enabled 状态\n\n2. 托盘图标看不见：\n- tray.rs：原本 hIcon 写 null，Win10+ 上 Shell_NotifyIconW(NIM_ADD, NULL hIcon) 实际渲染为空白或很弱的小方块。改用 LoadIconW(NULL, IDI_APPLICATION) 加载 Windows 自带的应用程序图标（无需嵌入 .ico 资源，主题感知）。show_toast / Drop 的 hIcon 维持 null（让 NIM_MODIFY/NIM_DELETE 不动原有图标）。AGENTS.md §53 标记真 .ico 资源为 V2 项。

src/lib.rs

@@ -356,6 +356,37 @@ pub fn run() -> error::AppResult<()> {
     ui.set_status_text(status_text.into());
     ui.set_is_connected(is_connected);
 
+    // Phase 7 C5: forward active-server summary to SettingsPage.
+    // V1 only has the single active server (AGENTS.md §21), so we
+    // surface exactly that. Empty values trigger the "未配置服务器"
+    // empty-state in SettingsPage. Display name falls back to the
+    // URL host (e.g. "gotify.example.com" or "192.168.50.103:8418")
+    // since `ServerConfig` only carries base_url + token — the human-
+    // friendly `name` lives on `ServerEntry`, which V1 doesn't expose
+    // through `ActiveConfig`. That's fine for V1.
+    match cfg.server.as_ref() {
+        Some(server) => {
+            let display_name = url::Url::parse(&server.base_url)
+                .ok()
+                .and_then(|u| u.host_str().map(|s| {
+                    if let Some(port) = u.port() {
+                        format!("{s}:{port}")
+                    } else {
+                        s.to_string()
+                    }
+                }))
+                .unwrap_or_else(|| server.base_url.clone());
+            ui.set_active_server_name(display_name.into());
+            ui.set_active_server_url(server.base_url.as_str().into());
+            ui.set_active_server_enabled(is_connected);
+        }
+        None => {
+            ui.set_active_server_name("（未配置服务器）".into());
+            ui.set_active_server_url("".into());
+            ui.set_active_server_enabled(false);
+        }
+    }
+
     // ── Phase 4 C2 + 5 C2 + 7 C1/C2 + 7 C4: WebSocket worker + UI-thread
     // drain. The drain closure now writes to BOTH the canonical
     // shared_model AND the filtered_model (honoring the active
@@ -584,6 +615,10 @@ pub fn run() -> error::AppResult<()> {
                     if let Some(ui) = ui_handle.upgrade() {
                         ui.set_status_text(text.into());
                         ui.set_is_connected(true);
+                        // Phase 7 C5: refresh the active-server
+                        // summary so the Settings card lights up
+                        // green after a successful test.
+                        ui.set_active_server_enabled(true);
                     }
                     tracing::info!(msgs = msgs.len(), "Test Connection: ok");
                 }
@@ -593,6 +628,10 @@ pub fn run() -> error::AppResult<()> {
                             format!("未连接 · 模拟数据 · {}", server.base_url).into(),
                         );
                         ui.set_is_connected(false);
+                        // Phase 7 C5: failed test → server card
+                        // dot returns to "configured but not
+                        // connected" (gray).
+                        ui.set_active_server_enabled(false);
                     }
                     tracing::warn!("Test Connection: failed");
                 }