fix(status): source column reflects real traffic + theme-aware tray menu

- api/status sources now carry recent_ok/recent_err (last 300s real gateway
  requests via Stats.SourceRecent) so a source actually serving traffic is
  never shown as down just because probe /models got rate-limited
- WebUI source status column repaints every 5s (no more frozen-at-first-
  render) with a manual refresh button; shows success rate + probe + cooldown
- tray menu status rows were enabled:false (GTK fixed light-grey, invisible
  on light themes) — now enabled with no-op click and nativeTheme listener
  rebuilds the menu on dark/light switches
- ignore local ops scripts (scripts/, machine-specific)

cmd/gui/main.js

@@ -10,6 +10,7 @@ const {
   Tray,
   shell,
   nativeImage,
+  nativeTheme,
 } = require("electron");
 const path = require("path");
 const fs = require("fs");
@@ -357,17 +358,27 @@ function createTray() {
     );
   }
   tray = new Tray(img);
+  // Rebuild the context menu when the OS theme flips (dark/light) so menu
+  // text colors follow the desktop theme; nativeTheme is the Electron API
+  // that tracks GTK/appindicator dark mode on Linux.
+  const themeRebuild = () => {
+    try {
+      if (global.__rebuildTray) global.__rebuildTray();
+    } catch (e) {}
+  };
+  try {
+    nativeTheme.on("updated", themeRebuild);
+  } catch (e) {}
+  // Status rows used to be enabled:false, which GTK renders in a fixed light
+  // grey that never flips with the system dark/light theme — invisible on
+  // light desktops. They are now enabled (normal theme-aware fg) with a
+  // no-op click so they stay display-only but inherit the menu text color.
+  const statusRow = (text) => ({ label: text, enabled: true, click: () => {} });
   const rebuild = () => {
     const running = coreStarted();
     const menu = Menu.buildFromTemplate([
-      {
-        label: "ModelRouter Desktop",
-        enabled: false,
-      },
-      {
-        label: running ? "● 内核运行中" : "○ 内核已停止",
-        enabled: false,
-      },
+      statusRow("ModelRouter Desktop"),
+      statusRow(running ? "● 内核运行中" : "○ 内核已停止"),
       { type: "separator" },
       {
         label: "显示主窗口",