Merge origin/main into mac-in-headset

Brings in #4, #5, #8 (fbl100's verified Remmina/VNC mirror), APK
alternatives and the website. docs/streaming.md: Mac in the headset stays
the recommendation (now verified on the Frame); Remmina keeps #8's verified
evidence as the whole-screen fallback. docs/mac-in-headset.md cites #8's
lag finding.

Co-Authored-By: Claude Opus 5.5 (1M context) <noreply@anthropic.com>

README.md

@@ -12,12 +12,17 @@ See what the headset sees, install games and Android apps, move files and text a
 [![Checks](https://img.shields.io/github/actions/workflow/status/saphid/steam-frame/checks.yml?branch=main&label=checks)](https://github.com/saphid/steam-frame/actions/workflows/checks.yml)
 [![License: MIT](https://img.shields.io/badge/license-MIT-66c0f4)](LICENSE)
 
-[**Download**](#install) · [Features](#features) · [Set up the headset](#set-up-the-headset) · [Feedback](#feedback) · [Docs](#going-further)
+[**Website**](https://frame-control.pages.dev) · [**Download**](#install) · [Trailer](#trailer) · [Features](#features) · [Set up the headset](#set-up-the-headset) · [Feedback](#feedback) · [Docs](#going-further)
 
 <br>
 
 <img src="docs/img/frame-control.png" alt="Frame Control's Games tab: installed games, sideloaded titles, and your Steam library with Frame ratings" width="900">
 
+<a id="trailer"></a>
+<a href="https://github.com/saphid/steam-frame/releases/download/trailer/frame-control-trailer.mp4"><img src="docs/img/trailer.jpg" alt="Watch the Frame Control trailer" width="900"></a>
+
+<sub>The trailer: 66 seconds, with sound. Downloads the MP4 from the trailer release.</sub>
+
 <sub>Unofficial hobby project, not affiliated with Valve. Free and open source.</sub>
 
 </div>
@@ -170,13 +175,17 @@ entry to `~/.ssh/config` and keys at `~/.ssh/id_ed25519_frame` and
 ## Feedback
 
 This is a first public test, so reports are really useful, especially from
-Windows and Linux. Please [open an issue](https://github.com/saphid/steam-frame/issues/new)
-with:
+Windows and Linux. The quickest way is the
+[feedback form](https://frame-control.pages.dev/feedback/): no GitHub account
+needed, and it opens an issue here. Please include:
 
 - what you tried and what happened
 - your computer's OS and your SteamOS build (Steam Settings → System)
 - the server log: **Frame → Show Server Log** in the app
 
+Issues and PRs opened directly on GitHub by new contributors are auto-closed
+until a maintainer approves them; see [CONTRIBUTING.md](CONTRIBUTING.md).
+
 ## Going further
 
 This repo also holds the scripts behind the app and field notes on how the