feat(flicker): avoid triggering initial render from branch widget

src/tui/status/branch.zig

@@ -93,7 +93,8 @@ fn process_git(self: *Self, m: tp.message) MessageFilter.Error!bool {
 }
 
 fn process_status(self: *Self, m: tp.message) MessageFilter.Error!bool {
-    defer Widget.need_render();
+    defer if (tui.frames_rendered() > 0)
+        Widget.need_render();
 
     var value: []const u8 = undefined;
     var ahead: []const u8 = undefined;

src/tui/tui.zig

@@ -61,6 +61,7 @@ fontface_: []const u8 = "",
 fontfaces_: std.ArrayListUnmanaged([]const u8) = .{},
 enable_mouse_idle_timer: bool = false,
 query_cache_: *syntax.QueryCache,
+frames_rendered_: usize = 0,
 
 const keepalive = std.time.us_per_day * 365; // one year
 const idle_frames = 0;
@@ -449,6 +450,7 @@ fn receive_safe(self: *Self, from: tp.pid_ref, m: tp.message) !void {
 }
 
 fn render(self: *Self) void {
+    defer self.frames_rendered_ += 1;
     const current_time = std.time.microTimestamp();
     if (current_time < self.frame_last_time) { // clock moved backwards
         self.frame_last_time = current_time;
@@ -1184,6 +1186,11 @@ pub fn need_render() void {
     }
 }
 
+pub fn frames_rendered() usize {
+    const self = current();
+    return self.frames_rendered_;
+}
+
 pub fn resize() void {
     mainview_widget().resize(screen());
     refresh_hover();