[Init] Initial commit - NetMesh terminal manager

electron/bridges/windowManager/windowsWindowChrome.cjs

@@ -0,0 +1,56 @@
+/**
+ * Windows frameless window chrome helpers.
+ *
+ * Background (#2505):
+ * - Frameless Win11 windows need an explicit `roundedCorners: true` so DWM
+ *   applies the system round clip (Electron 34+).
+ * - Transparent tray popups that keep the default opaque white backdrop + CSS
+ *   `border-radius` produce square tips under a rounded panel.
+ *
+ * Approach:
+ * - App content windows (resizable): solid host + native `roundedCorners`.
+ *   Do NOT set `transparent: true` here - Electron documents transparent
+ *   windows as not resizable, and `resizable: true` can break them
+ *   (https://www.electronjs.org/docs/latest/tutorial/custom-window-styles).
+ * - Tray / CSS-shaped popovers (`resizable: false`): transparent host + clear
+ *   backdrop + `roundedCorners: false` so only the CSS radius defines the
+ *   silhouette (Electron #46468: Win11 otherwise forces OS rounding on
+ *   transparent windows).
+ */
+
+const CLEAR_BACKGROUND = "#00000000";
+
+function isWindowsPlatform(platform = process.platform) {
+  return platform === "win32";
+}
+
+/**
+ * Options for full-bleed app windows (main / settings / terminal popup).
+ * Safe to spread on non-Windows - returns an empty object.
+ */
+function windowsFramelessContentChromeOptions(platform = process.platform) {
+  if (!isWindowsPlatform(platform)) return {};
+  return {
+    roundedCorners: true,
+  };
+}
+
+/**
+ * Options for CSS-rounded overlay windows (tray panel).
+ * Always apply when creating those windows; callers already opt into transparency.
+ */
+function windowsCssRoundedOverlayChromeOptions(platform = process.platform) {
+  return {
+    transparent: true,
+    backgroundColor: CLEAR_BACKGROUND,
+    // Overlay shape comes from CSS; keep OS rounding off on Win11.
+    ...(isWindowsPlatform(platform) ? { roundedCorners: false } : {}),
+  };
+}
+
+module.exports = {
+  CLEAR_BACKGROUND,
+  isWindowsPlatform,
+  windowsFramelessContentChromeOptions,
+  windowsCssRoundedOverlayChromeOptions,
+};