Windows: main window title is empty, so the taskbar shows no app name

[exdraz]

Describe the bug
The Buzz main window has no title set. Windows draws taskbar labels from the window caption, so the Buzz taskbar entry renders as an icon with no name next to it.

Steps to reproduce

1. Launch Buzz on Windows 11
2. Look at the taskbar entry for Buzz
3. The icon appears with no accompanying app name, unlike every other running application

Expected behavior
The taskbar entry should read "Buzz" next to the icon.

Version and platform

• Buzz version: 0.5.17
• OS: Windows 11 Pro 25H2, build 26200.9168

Logs / additional context
buzz-desktop's MainWindowTitle is an empty string (length 0). Comparison of MainWindowTitle across running apps on the same machine:

Process	MainWindowTitle
ChatGPT	ChatGPT
codexbar	CodexBar Desktop
claude	Claude
WhatsApp.Root	WhatsApp
buzz-desktop	<empty>

Nothing is suppressing the label — the string simply isn't set. Likely the Tauri window title field is unset in the app configuration.

[DarkElfLX]

I can confirm the empty native window title has an additional functional consequence on Windows beyond the missing taskbar label.

I use DisplayFusion for per-monitor taskbars. Buzz is the only application I've encountered whose taskbar button remains permanently on the primary Windows taskbar instead of following the window to the taskbar for its current monitor.

I captured the Buzz HWND with Binary Fortress Window Inspector. The visible top-level window is:

Process: buzz-desktop.exe
Class: Tauri Window
Parent: NULL
Owner: NULL
Visible: Yes
StyleEx: ... WS_EX_APPWINDOW ...

DisplayFusion correctly identifies the window's position and monitor, but its taskbar-window classifier returns:

IsTaskbarWindow: No [NoWindowText ...]

The native window text is empty.

This suggests the empty title addressed by #6317 has a functional compatibility impact with third-party taskbar/window-management software, not just a cosmetic missing taskbar label. Setting the native title to Buzz may therefore also resolve per-monitor taskbar tracking.

I can provide the complete Window Inspector output if useful.