feat: **1 — `git.ts`:** Add exported `getCurrentBranch` helpe… (+8 more)

- ✅ **1 — `git.ts`:** Add exported `getCurrentBranch` helper after `ensureGitRepo`
- ✅ **2a — `ipc/handlers.ts`:** Update git import to include `ensureGitRepo` and `getCurrentBranch`
- ✅ **2b — `ipc/handlers.ts`:** Replace `workflow:advance` implement-phase block with branching-toggle logic
- ✅ **3 — `GitSettings.tsx`:** Create new settings component with pill toggle
- ✅ **4 — `SettingsPage.tsx`:** Add `"git"` section type, import, nav item, content render; fix both unicode glyphs
- ✅ **5 — `globals.css`:** Append toggle-row + pill toggle + maximize-btn CSS
- ✅ **6 — `index.ts`:** Add `ipcMain` to import; add `window:toggleMaximize` handler + maximize/unmaximize events inside `createWindow()`
- ✅ **7 — `preload.ts`:** Add `toggleMaximize` + `onWindowMaximized` to interface and `api` object
- ✅ **8 — `Header.tsx`:** Add `isMaximized` state + effect + maximize button in JSX

1 files changed, 13 insertions, 1 deletions

diff --git a/src/main/index.ts b/src/main/index.ts
index a7bed00..f913ac0 100644
--- a/src/main/index.ts
+++ b/src/main/index.ts
@@ -1,4 +1,4 @@
-import { app, BrowserWindow, Menu } from "electron";
+import { app, BrowserWindow, Menu, ipcMain } from "electron";
 import path from "node:path";
 import { getDb, closeDb } from "./db";
 import { registerIpcHandlers } from "./ipc/handlers";
@@ -23,6 +23,18 @@ function createWindow() {
 
   registerIpcHandlers(mainWindow);
 
+  // Maximize toggle — works identically on Linux and macOS
+  ipcMain.handle("window:toggleMaximize", () => {
+    if (mainWindow!.isMaximized()) mainWindow!.unmaximize();
+    else mainWindow!.maximize();
+  });
+
+  // Push state to renderer so the button glyph stays accurate.
+  // On macOS, clicking the green traffic light also fires these events,
+  // keeping our custom button in sync with the native control.
+  mainWindow.on("maximize",   () => mainWindow!.webContents.send("window:maximized", true));
+  mainWindow.on("unmaximize", () => mainWindow!.webContents.send("window:maximized", false));
+
   if (isDev) {
     const url = process.env.VITE_DEV_SERVER_URL ?? "http://localhost:5173";
     mainWindow.loadURL(url).finally(() => {