fix(desktop): external gateway mode and start script alignment

- Add desktop env for non-embedded gateway (OCLAW_DESKTOP_EMBED_BACKEND, base URL, skip channel).
- Wire start_all/start_desktop to pass gateway URL when keeping existing gateway; fix root start_all flags.
- Prefer electron.cmd for background desktop launch; admin static theme presets and chat boot timeouts.

Co-authored-by: Cursor <cursoragent@cursor.com>

interfaces/admin/static/admin-theme.js

@@ -0,0 +1,51 @@
+/* Admin + standalone /chat: restore palette from localStorage before first paint. */
+(function () {
+  const STORAGE_KEY = "oclaw_admin_theme";
+  const THEMES = ["deepseek", "github", "nord", "dracula", "forest", "catppuccin", "light"];
+  const LEGIT = new Set(THEMES);
+
+  function applyAdminTheme(theme) {
+    const t = theme && LEGIT.has(theme) ? theme : "deepseek";
+    if (t === "deepseek") document.body.removeAttribute("data-admin-theme");
+    else document.body.setAttribute("data-admin-theme", t);
+  }
+
+  function initAdminThemeFromStorage() {
+    let raw = "deepseek";
+    try {
+      raw = localStorage.getItem(STORAGE_KEY) || "deepseek";
+    } catch (_) {
+      raw = "deepseek";
+    }
+    if (!LEGIT.has(raw)) raw = "deepseek";
+    applyAdminTheme(raw);
+    return raw;
+  }
+
+  function persistAdminTheme(theme) {
+    const t = theme && LEGIT.has(theme) ? theme : "deepseek";
+    try {
+      localStorage.setItem(STORAGE_KEY, t);
+    } catch (_) {}
+    applyAdminTheme(t);
+  }
+
+  function currentAdminTheme() {
+    try {
+      const v = localStorage.getItem(STORAGE_KEY);
+      return v && LEGIT.has(v) ? v : "deepseek";
+    } catch (_) {
+      return "deepseek";
+    }
+  }
+
+  window.OclawAdminTheme = {
+    STORAGE_KEY,
+    THEMES,
+    applyAdminTheme,
+    initAdminThemeFromStorage,
+    persistAdminTheme,
+    currentAdminTheme,
+  };
+  initAdminThemeFromStorage();
+})();