Release v0.8.0: Windows support

Windows now builds, tests, and runs (verified on a real machine).

- Bump version 0.7.0 -> 0.8.0.
- README: add Windows to the platform badge/tagline, document the
  prebuilt bundle install path, list the Windows default playlist
  location, and drop the 'Windows not a v1 goal' note.
- Add a release workflow that builds the self-contained Windows bundle
  (static-CRT exe + libopenmpt + audio deps + MSVC runtime DLLs) and
  attaches rtrax-windows-x64.zip to the GitHub Release on 'v*' tag push,
  so the README's 'download from Assets' instructions are real.

Author: swilcox

.github/workflows/release.yml

@@ -0,0 +1,62 @@
+name: Release
+
+on:
+  push:
+    tags: ['v*']
+
+permissions:
+  contents: write
+
+jobs:
+  windows-bundle:
+    name: Windows bundle
+    runs-on: windows-latest
+    steps:
+      - uses: actions/checkout@v4
+
+      - name: Install libopenmpt
+        shell: pwsh
+        run: |
+          # vcpkg is pre-installed on GitHub's Windows runners.
+          vcpkg install libopenmpt:x64-windows
+          $root = "$env:VCPKG_INSTALLATION_ROOT/installed/x64-windows"
+          # openmpt-sys's build.rs emits `-lopenmpt`; vcpkg ships libopenmpt.lib.
+          if ((Test-Path "$root/lib/libopenmpt.lib") -and -not (Test-Path "$root/lib/openmpt.lib")) {
+            Copy-Item "$root/lib/libopenmpt.lib" "$root/lib/openmpt.lib"
+          }
+          echo "RTRAX_OPENMPT_LIB_DIR=$root/lib" >> $env:GITHUB_ENV
+
+      - name: Install Rust toolchain
+        uses: dtolnay/rust-toolchain@stable
+
+      - uses: Swatinem/rust-cache@v2
+
+      # Static CRT so the target machine needs no Visual C++ redistributable
+      # for the exe itself; the bundled vcpkg DLLs still need the runtime DLLs,
+      # which are bundled below.
+      - name: Build release (static CRT)
+        shell: pwsh
+        env:
+          RUSTFLAGS: -C target-feature=+crt-static
+        run: cargo build --release --bin rtrax
+
+      - name: Stage bundle
+        shell: pwsh
+        run: |
+          $stage = "rtrax-windows-x64"
+          New-Item -ItemType Directory -Force -Path $stage | Out-Null
+          Copy-Item target/release/rtrax.exe $stage/
+          # libopenmpt.dll plus its runtime dependencies.
+          Copy-Item "$env:VCPKG_INSTALLATION_ROOT/installed/x64-windows/bin/*.dll" $stage/
+          # MSVC runtime DLLs the vcpkg DLLs link dynamically — bundle them so
+          # the target machine needs no Visual C++ redistributable at all.
+          foreach ($dll in 'msvcp140.dll', 'vcruntime140.dll', 'vcruntime140_1.dll') {
+            Copy-Item "$env:SystemRoot/System32/$dll" $stage/
+          }
+          Copy-Item README.md, LICENSE $stage/
+          Compress-Archive -Path "$stage/*" -DestinationPath "rtrax-windows-x64.zip"
+
+      - name: Attach bundle to release
+        uses: softprops/action-gh-release@v2
+        with:
+          files: rtrax-windows-x64.zip

Cargo.lock

@@ -1,6 +1,6 @@
 [package]
 name = "rtrax"
-version = "0.7.0"
+version = "0.8.0"
 edition = "2021"
 description = "TUI MOD/XM/IT/S3M/MTM module player"
 license = "MIT OR Apache-2.0"

Cargo.toml

@@ -5,7 +5,7 @@
 [![License: MIT](https://img.shields.io/badge/license-MIT-blue.svg)](LICENSE)
 [![Made with Rust](https://img.shields.io/badge/made_with-rust-CE412B?logo=rust&logoColor=white)](https://www.rust-lang.org/)
 [![Edition 2021](https://img.shields.io/badge/edition-2021-blue.svg)](https://doc.rust-lang.org/edition-guide/rust-2021/index.html)
-[![Platform](https://img.shields.io/badge/platform-macOS%20%7C%20Linux-lightgrey.svg)](#install)
+[![Platform](https://img.shields.io/badge/platform-macOS%20%7C%20Linux%20%7C%20Windows-lightgrey.svg)](#install)
 [![Type: TUI](https://img.shields.io/badge/type-TUI-9cf.svg)](https://github.com/ratatui-org/ratatui)
 [![Audio: libopenmpt](https://img.shields.io/badge/audio-libopenmpt-purple.svg)](https://lib.openmpt.org/libopenmpt/)
 [![Latest release](https://img.shields.io/github/v/release/swilcox/rtrax?sort=semver&display_name=tag)](https://github.com/swilcox/rtrax/releases/latest)
@@ -15,7 +15,7 @@
 
 A TUI module player for `.mod` / `.xm` / `.it` / `.s3m` / `.mtm` (and anything
 else libopenmpt reads). Per-channel level meters, scrolling pattern view,
-master spectrum analyzer, file browser. macOS + Linux.
+master spectrum analyzer, file browser. macOS, Linux, and Windows.
 
 ![rtrax screenshot](docs/screenshot.png)
 
@@ -24,7 +24,26 @@ master spectrum analyzer, file browser. macOS + Linux.
 
 ## Install
 
-System library — libopenmpt is a runtime dependency, not vendored.
+### Windows (prebuilt bundle)
+
+No toolchain needed. A self-contained bundle is attached to every
+[release](https://github.com/swilcox/rtrax/releases/latest) under **Assets** as
+`rtrax-windows-x64.zip`:
+
+1. Download `rtrax-windows-x64.zip` from the latest release and unzip it.
+2. Keep `rtrax.exe` and the bundled `.dll` files together in one folder.
+3. Run `rtrax.exe` — pass a module path (`rtrax.exe song.xm`) or launch with no
+   argument to open the file browser.
+
+The zip ships libopenmpt, its audio dependencies, and the MSVC runtime DLLs, so
+**nothing else needs installing** — no Visual C++ redistributable required. For
+the best rendering (truecolor, Unicode box-drawing), run it from
+[Windows Terminal](https://aka.ms/terminal). If SmartScreen warns about an
+unsigned binary, choose **More info → Run anyway**.
+
+### macOS / Linux (build from source)
+
+libopenmpt is a runtime dependency, installed as a system library:
 
 ```sh
 # macOS
@@ -118,6 +137,7 @@ Press `a` to append the currently-playing file to the playlist. Without a
 
 - **Linux:** `~/.local/share/rtrax/playlist.m3u`
 - **macOS:** `~/Library/Application Support/rtrax/playlist.m3u`
+- **Windows:** `%LOCALAPPDATA%\rtrax\playlist.m3u`
 
 The file is created automatically (with an `#EXTM3U` header) if it doesn't
 exist yet. Pressing `a` multiple times is safe — each press appends one entry.
@@ -253,4 +273,3 @@ stdout, because that would corrupt ratatui's alternate-screen rendering.
 - Network features, streaming protocols, web UI.
 - Format conversion (libopenmpt is read-only here).
 - Plugin systems, scripting, custom DSP effects.
-- Windows support — not blocked, but not a v1 goal.