feat: app icon + Arch package (PKGBUILD + .desktop)

Add a desktop/taskbar identity and a system package for PeerSpeak.

- assets/icons/peerspeak.svg: master app icon — the in-app mic glyph
  over a P2P mesh of peer nodes, Catppuccin Mocha palette. Rendered to
  the hicolor raster sizes (16..512) committed alongside it.
- Window/taskbar icon: embed a 128x128 straight-RGBA blob and load it
  via iced from_rgba (keeps us off iced's heavy `image` feature). Set
  the Wayland/X11 app_id to "peerspeak" so compositors match the window
  to the .desktop launcher and show the icon natively.
- packaging/peerspeak.desktop: launcher (StartupWMClass=peerspeak).
- packaging/PKGBUILD: peerspeak-git VCS package — cargo --frozen build,
  --lib check, installs the binary, .desktop, and hicolor icons.

Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>

assets/icons/peerspeak.svg

@@ -0,0 +1,41 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<svg width="256" height="256" viewBox="0 0 256 256" xmlns="http://www.w3.org/2000/svg">
+  <!-- PeerSpeak app icon: in-app mic glyph + P2P mesh nodes, Catppuccin Mocha. -->
+  <defs>
+    <linearGradient id="tile" x1="0" y1="0" x2="0" y2="1">
+      <stop offset="0" stop-color="#1e1e2e"/>
+      <stop offset="1" stop-color="#181825"/>
+    </linearGradient>
+  </defs>
+
+  <!-- Rounded-square tile -->
+  <rect x="20" y="20" width="216" height="216" rx="48" fill="url(#tile)"
+        stroke="#313244" stroke-width="3"/>
+
+  <!-- P2P mesh: edges (under nodes + mic) -->
+  <g stroke="#45475a" stroke-width="6" stroke-linecap="round" fill="none">
+    <line x1="74"  y1="74"  x2="128" y2="128"/>
+    <line x1="182" y1="74"  x2="128" y2="128"/>
+    <line x1="74"  y1="182" x2="128" y2="128"/>
+    <line x1="182" y1="182" x2="128" y2="128"/>
+    <line x1="74"  y1="74"  x2="182" y2="74"/>
+    <line x1="74"  y1="182" x2="182" y2="182"/>
+  </g>
+
+  <!-- P2P mesh: peer nodes -->
+  <g fill="#b4befe">
+    <circle cx="74"  cy="74"  r="11"/>
+    <circle cx="182" cy="74"  r="11"/>
+    <circle cx="74"  cy="182" r="11"/>
+    <circle cx="182" cy="182" r="11"/>
+  </g>
+
+  <!-- Microphone (hero) — same geometry as the in-app Mic icon, scaled 6.4x -->
+  <g fill="none" stroke="#89b4fa" stroke-width="13"
+     stroke-linecap="round" stroke-linejoin="round">
+    <rect x="108.8" y="68.8" width="38.4" height="70.4" rx="19.2"/>
+    <path d="M 169.6 123.2 A 41.6 41.6 0 0 0 86.4 123.2"/>
+    <line x1="128" y1="164.8" x2="128" y2="187.2"/>
+    <line x1="105.6" y1="187.2" x2="150.4" y2="187.2"/>
+  </g>
+</svg>

packaging/PKGBUILD

@@ -0,0 +1,68 @@
+# Maintainer: mollusk <jitty+lc1iz0dc@protonmail.com>
+pkgname=peerspeak-git
+_pkgname=peerspeak
+pkgver=0.1.0
+pkgrel=1
+pkgdesc="Decentralized peer-to-peer voice chat (Rust/iroh/PipeWire/Opus/iced)"
+arch=('x86_64')
+url="https://gitbutter.xyz/mollusk/peerspeak"
+license=('custom')
+depends=('pipewire' 'opus')
+makedepends=('git' 'cargo' 'pkgconf')
+optdepends=('pixelpass: screen sharing inside a room'
+            'mpv: screen-share viewer (vlc is used as a fallback)')
+provides=('peerspeak')
+conflicts=('peerspeak')
+options=('!lto' '!debug')
+source=("$_pkgname::git+ssh://git@gitbutter.xyz/mollusk/peerspeak.git")
+sha256sums=('SKIP')
+
+pkgver() {
+  cd "$srcdir/$_pkgname"
+  # 0.1.0.r<commits>.g<short-sha> — sorts monotonically across rebuilds.
+  printf '%s.r%s.g%s' \
+    "$(awk -F'\"' '/^version =/{print $2; exit}' Cargo.toml)" \
+    "$(git rev-list --count HEAD)" \
+    "$(git rev-parse --short HEAD)"
+}
+
+prepare() {
+  cd "$srcdir/$_pkgname"
+  # Vendor deps up front so build() can run --frozen (no surprise network).
+  export CARGO_HOME="$srcdir/cargo-home"
+  cargo fetch --locked --target "$(rustc -vV | sed -n 's/host: //p')"
+}
+
+build() {
+  cd "$srcdir/$_pkgname"
+  export CARGO_HOME="$srcdir/cargo-home"
+  export RUSTUP_TOOLCHAIN=stable
+  export CARGO_TARGET_DIR=target
+  cargo build --frozen --release --bin "$_pkgname"
+}
+
+check() {
+  cd "$srcdir/$_pkgname"
+  export CARGO_HOME="$srcdir/cargo-home"
+  export RUSTUP_TOOLCHAIN=stable
+  # Library unit tests only — the integration suites bind real iroh/QUIC
+  # endpoints and fail in a sandboxed/offline build environment.
+  cargo test --frozen --release --lib
+}
+
+package() {
+  cd "$srcdir/$_pkgname"
+
+  install -Dm755 "target/release/$_pkgname" "$pkgdir/usr/bin/$_pkgname"
+  install -Dm644 "packaging/$_pkgname.desktop" \
+    "$pkgdir/usr/share/applications/$_pkgname.desktop"
+
+  # Hicolor icon theme (scalable SVG + the rendered raster sizes).
+  install -Dm644 "assets/icons/$_pkgname.svg" \
+    "$pkgdir/usr/share/icons/hicolor/scalable/apps/$_pkgname.svg"
+  local s
+  for s in 16 24 32 48 64 128 256 512; do
+    install -Dm644 "assets/icons/$_pkgname-$s.png" \
+      "$pkgdir/usr/share/icons/hicolor/${s}x${s}/apps/$_pkgname.png"
+  done
+}

packaging/peerspeak.desktop

@@ -0,0 +1,11 @@
+[Desktop Entry]
+Type=Application
+Name=PeerSpeak
+GenericName=P2P Voice Chat
+Comment=Decentralized peer-to-peer voice chat
+Exec=peerspeak
+Icon=peerspeak
+Terminal=false
+Categories=Network;Telephony;Chat;
+Keywords=voice;chat;voip;p2p;peer;
+StartupWMClass=peerspeak

src/app/mod.rs

@@ -336,6 +336,15 @@ pub fn run_gui() -> iced::Result {
             // dock doesn't squeeze the controls column). Layout is responsive.
             size: init_size,
             position: iced::window::Position::Centered,
+            // App/taskbar icon (mainly used on X11/XWayland; native Wayland takes
+            // the icon from the .desktop file matched by app_id instead).
+            icon: window_icon(),
+            // app_id must match the .desktop basename so Wayland compositors
+            // (e.g. KWin) attach our launcher icon to the window.
+            platform_specific: iced::window::settings::PlatformSpecific {
+                application_id: "peerspeak".to_string(),
+                ..Default::default()
+            },
             // We save the final size ourselves on CloseRequested, then exit.
             exit_on_close_request: false,
             ..Default::default()
@@ -343,6 +352,14 @@ pub fn run_gui() -> iced::Result {
         .run()
 }
 
+/// Build the window icon from an embedded 128×128 straight-RGBA blob rendered
+/// from `assets/icons/peerspeak.svg`. Using `from_rgba` (always available) keeps
+/// us off iced's heavy `image` feature — the blob is raw pixels, no decoder.
+fn window_icon() -> Option<iced::window::Icon> {
+    const RGBA: &[u8] = include_bytes!("../../assets/icons/peerspeak-128.rgba");
+    iced::window::icon::from_rgba(RGBA.to_vec(), 128, 128).ok()
+}
+
 fn subscription(_state: &AppState) -> Subscription<AppMessage> {
     let core_sub = Subscription::run(core_subscription).map(AppMessage::UiEventReceived);
     let event_sub = iced::event::listen().map(AppMessage::EventOccurred);