feat(launcher): native Windows support

Port the egui launcher to run natively on Windows (no Wine/Proton). The GUI,
launch state machine, config, health/account monitors, and openfut.cfg writing
are unchanged and cross-platform; only the effect layer is branched:

- game_launch: cfg(windows) launch spawns the game executable directly with its
  working dir (the version.dll hijack loads from the game dir; no WINEDLLOVERRIDES,
  Wine prefix, or licence regen). Requires the launcher to run elevated so the
  child inherits admin. Linux Proton path gated cfg(unix).
- arm: cfg(windows) is a no-op (routing is openfut.cfg, written by the client-files
  step; no ptrace_scope/DNAT/hosts). Linux arming gated cfg(unix).
- local_services: on Windows LSX/autopatch are in-process (stp-origin_emu.dll +
  version.dll hook), so ensure_running reports ready without spawning. Gated the
  unix-only CommandExt/process_group.
- preflight: cfg(windows) run() keeps only backend-reachable + hook-config checks.
- config: GameProfile configured()/validate() accept a runner-less Windows profile.

theme: fix a latent cross-platform panic — egui 0.29 keeps a Style per theme, so
set_style only reached the active one and TextStyle::resolve("Hero") panicked when
the other theme rendered. Install the full style into both themes and pin Dark.

Cross-built for x86_64-pc-windows-gnu; Linux build + 75 tests unchanged.

src/arm.rs

@@ -25,6 +25,7 @@ use crate::config::LauncherConfig;
 /// Accept only hostname/IP characters. These values come from config fields that
 /// are ever only IPs or hostnames, so a surprising character is a bug — reject it
 /// rather than try to escape it into an elevated shell command.
+#[cfg(unix)]
 fn safe_host(s: &str) -> anyhow::Result<&str> {
     let t = s.trim();
     if t.is_empty() {
@@ -41,6 +42,7 @@ fn safe_host(s: &str) -> anyhow::Result<&str> {
 
 /// Build the privileged arming script. Pure and unit-tested; the effectful part
 /// ([`arm`]) only validates config and hands this to the elevated runner.
+#[cfg(unix)]
 pub(crate) fn arming_script(
     server: &str,
     redirector_port: u16,
@@ -84,6 +86,7 @@ pub(crate) fn arming_script(
 /// Human-readable list of what [`arm`] changed, in the order the script applies
 /// it. Logged by the UI so the user sees exactly what was set — not just that
 /// "something" ran under `pkexec`.
+#[cfg(unix)]
 pub(crate) fn arming_summary(
     server: &str,
     redirector_port: u16,
@@ -103,6 +106,16 @@ pub(crate) fn arming_summary(
 /// Arm the client from config, under one elevated prompt. Requires the same
 /// fields preflight reads; a missing one is a clear error, never a silent
 /// loopback fallback. Returns the applied changes for the UI to surface.
+/// On native Windows there is nothing to arm: routing is the `openfut.cfg` the
+/// client-files step writes into the game directory (read by the version.dll
+/// hook), and there is no `ptrace_scope`, DNAT, or `/etc/hosts` to set. Returns
+/// no changes so the launch sequence treats client preparation as satisfied.
+#[cfg(windows)]
+pub fn arm(_cfg: &LauncherConfig) -> anyhow::Result<Vec<String>> {
+    Ok(Vec::new())
+}
+
+#[cfg(unix)]
 pub fn arm(cfg: &LauncherConfig) -> anyhow::Result<Vec<String>> {
     let server = cfg.openfut_server_host.trim();
     if server.is_empty() {
@@ -128,7 +141,7 @@ pub fn arm(cfg: &LauncherConfig) -> anyhow::Result<Vec<String>> {
     ))
 }
 
-#[cfg(test)]
+#[cfg(all(test, unix))]
 mod tests {
     use super::*;
 

src/config.rs

@@ -54,13 +54,18 @@ pub struct GameProfile {
 impl GameProfile {
     /// Whether this profile is filled in enough to launch from.
     pub fn configured(&self) -> bool {
-        !self.runner.trim().is_empty()
+        // Windows starts the executable directly (no runner); unix needs a
-            && !self.executable.trim().is_empty()
+        // runner such as umu-run.
-            && !self.game_dir.trim().is_empty()
+        #[cfg(windows)]
+        let runner_ok = true;
+        #[cfg(unix)]
+        let runner_ok = !self.runner.trim().is_empty();
+        runner_ok && !self.executable.trim().is_empty() && !self.game_dir.trim().is_empty()
     }
 
     /// Reject a half-filled profile rather than launching something surprising.
     pub fn validate(&self) -> Result<(), String> {
+        #[cfg(unix)]
         if self.runner.trim().is_empty() {
             return Err("Game profile has no runner (e.g. umu-run).".into());
         }
@@ -70,23 +75,28 @@ impl GameProfile {
         if self.game_dir.trim().is_empty() {
             return Err("Game profile has no game directory.".into());
         }
-        if !self.prefix_links.is_empty() && self.wine_prefix.trim().is_empty() {
+        // Wine-prefix links and the DRM licence precondition only exist on the
-            return Err("Game profile defines prefix links but no wine_prefix.".into());
+        // unix/Proton launch path; native Windows has neither.
-        }
+        #[cfg(unix)]
-        for l in &self.prefix_links {
+        {
-            if l.link.trim().is_empty() || l.target.trim().is_empty() {
+            if !self.prefix_links.is_empty() && self.wine_prefix.trim().is_empty() {
-                return Err("Game profile has a prefix link with an empty link or target.".into());
+                return Err("Game profile defines prefix links but no wine_prefix.".into());
             }
-            if std::path::Path::new(&l.link).is_absolute() {
+            for l in &self.prefix_links {
-                return Err(format!(
+                if l.link.trim().is_empty() || l.target.trim().is_empty() {
-                    "Prefix link {:?} must be relative to the Wine prefix.",
+                    return Err("Game profile has a prefix link with an empty link or target.".into());
-                    l.link
+                }
-                ));
+                if std::path::Path::new(&l.link).is_absolute() {
+                    return Err(format!(
+                        "Prefix link {:?} must be relative to the Wine prefix.",
+                        l.link
+                    ));
+                }
             }
-        }
+            if let Some(lic) = &self.license {
-        if let Some(lic) = &self.license {
+                if lic.path.trim().is_empty() || lic.generator.trim().is_empty() {
-            if lic.path.trim().is_empty() || lic.generator.trim().is_empty() {
+                    return Err("Game profile licence needs both a path and a generator.".into());
-                return Err("Game profile licence needs both a path and a generator.".into());
+                }
             }
         }
         Ok(())

src/game_launch.rs

@@ -24,11 +24,13 @@
 //! falls back to it, so an existing working setup cannot be broken by upgrading.
 
 use parking_lot::Mutex;
+#[cfg(unix)]
 use std::collections::BTreeMap;
 use std::io::{BufRead, BufReader};
 use std::path::{Path, PathBuf};
 use std::process::{Child, Command, Stdio};
 use std::sync::Arc;
+#[cfg(unix)]
 use std::time::{Duration, Instant};
 
 use crate::config::GameProfile;
@@ -45,6 +47,7 @@ fn say(log: &Log, msg: impl Into<String>) {
 /// Returns once the game process has been spawned; its output continues to
 /// stream into `log` on background threads. `on_exit` fires when the process
 /// ends, which is how the launch state machine leaves its Running state.
+#[cfg(unix)]
 pub fn launch(
     profile: &GameProfile,
     log: &Log,
@@ -96,6 +99,62 @@ pub fn launch(
     Ok(())
 }
 
+/// Windows-native launch: no Wine prefix, no `WINEDLLOVERRIDES` (the game loads
+/// the `version.dll` hook from its own directory through the normal search
+/// order), and no licence regeneration (the native loader handles DRM).
+/// Routing is the `openfut.cfg` that the client-files step already wrote into
+/// the game directory.
+///
+/// The launcher must itself be running elevated (its shortcut carries the
+/// RunAsAdmin bit): the loader requires administrator rights, and a child
+/// started with `CreateProcess` inherits the launcher's token instead of
+/// raising its own UAC prompt.
+#[cfg(windows)]
+pub fn launch(
+    profile: &GameProfile,
+    log: &Log,
+    on_exit: impl FnOnce() + Send + 'static,
+) -> anyhow::Result<()> {
+    profile.validate().map_err(anyhow::Error::msg)?;
+
+    let game_dir = PathBuf::from(&profile.game_dir);
+    if !game_dir.is_dir() {
+        anyhow::bail!("game_dir does not exist: {}", game_dir.display());
+    }
+    let exe = game_dir.join(&profile.executable);
+    if !exe.is_file() {
+        anyhow::bail!("game executable not found: {}", exe.display());
+    }
+
+    let mut cmd = Command::new(&exe);
+    cmd.current_dir(&game_dir)
+        .stdout(Stdio::piped())
+        .stderr(Stdio::piped());
+    for (k, v) in &profile.env {
+        cmd.env(k, v);
+    }
+
+    say(
+        log,
+        format!(
+            "[launcher] launching {} (cwd {})",
+            exe.display(),
+            game_dir.display()
+        ),
+    );
+
+    let child = cmd
+        .spawn()
+        .map_err(|e| anyhow::anyhow!("could not start {}: {e}", exe.display()))?;
+    stream(
+        child,
+        log.clone(),
+        "[launcher] game process exited.",
+        on_exit,
+    );
+    Ok(())
+}
+
 /// The registry key Wine reads DLL overrides from, and the one value the hook needs.
 ///
 /// Wine loads its own builtin `version.dll` unless an override says otherwise, so the
@@ -110,13 +169,17 @@ pub fn launch(
 /// survives restarts and applies to every launch path, including Steam. This mirrors
 /// what BepInEx documents for Proton (configure the proxy in winecfg rather than the
 /// environment) and what Proton itself already does in this prefix for other titles.
+#[cfg(unix)]
 const DLL_OVERRIDE_KEY: &str = r"HKCU\Software\Wine\DllOverrides";
+#[cfg(unix)]
 const HOOK_DLL_VALUE: &str = "version";
+#[cfg(unix)]
 const HOOK_DLL_OVERRIDE: &str = "native,builtin";
 
 /// `reg add` argv that persists the hook's DLL override, native-first with a builtin
 /// fallback. `/f` makes it idempotent, so this is safe to run on every launch and
 /// repairs a prefix a player has reset or replaced.
+#[cfg(unix)]
 fn dll_override_args() -> [&'static str; 10] {
     [
         "reg",
@@ -138,6 +201,7 @@ fn dll_override_args() -> [&'static str; 10] {
 /// Best-effort by design: a failure here is not fatal, because a launch we spawn also
 /// carries `WINEDLLOVERRIDES`. It is reported in plain language rather than as a Wine
 /// error, since the player cannot act on the latter.
+#[cfg(unix)]
 fn ensure_dll_override(profile: &GameProfile, log: &Log) {
     if profile.wine_prefix.trim().is_empty() {
         return;
@@ -163,7 +227,7 @@ fn ensure_dll_override(profile: &GameProfile, log: &Log) {
     }
 }
 
-#[cfg(test)]
+#[cfg(all(test, unix))]
 mod override_tests {
     use super::*;
 
@@ -204,6 +268,7 @@ mod override_tests {
 ///
 /// A profile that already pins `version=` wins: an operator overriding the hijack
 /// deliberately must not be silently overruled.
+#[cfg(unix)]
 fn hook_dll_overrides(env: &BTreeMap<String, String>) -> String {
     const HOOK: &str = "version=n,b";
     match env.get("WINEDLLOVERRIDES").map(|v| v.trim()) {
@@ -217,6 +282,7 @@ fn hook_dll_overrides(env: &BTreeMap<String, String>) -> String {
 ///
 /// Equivalent to `mkdir -p $WINEPREFIX/dosdevices && ln -sfn <target> <link>`:
 /// an existing link is replaced, so re-running is harmless.
+#[cfg(unix)]
 fn prepare_prefix(profile: &GameProfile, log: &Log) -> anyhow::Result<()> {
     if profile.wine_prefix.trim().is_empty() || profile.prefix_links.is_empty() {
         return Ok(());
@@ -257,6 +323,7 @@ fn prepare_prefix(profile: &GameProfile, log: &Log) -> anyhow::Result<()> {
 /// A crashed or failed launch deletes the licence, so this runs before every
 /// launch rather than only on first setup — that is the behaviour the shell
 /// script proved, and it is why a crash is normally self-healing on the next try.
+#[cfg(unix)]
 fn ensure_license(profile: &GameProfile, log: &Log) -> anyhow::Result<()> {
     let Some(lic) = &profile.license else {
         return Ok(());
@@ -316,6 +383,7 @@ fn ensure_license(profile: &GameProfile, log: &Log) -> anyhow::Result<()> {
 /// and it is reproduced deliberately — the pattern is a Windows executable name,
 /// which cannot match the launcher or a shell running it. (A `pkill -f` pattern
 /// that *can* match its own caller is a real hazard; this one cannot.)
+#[cfg(unix)]
 fn stop_generator(child: &mut Child, lic: &crate::config::LicenseCheck, log: &Log) {
     let _ = child.kill();
     let _ = child.wait();
@@ -333,6 +401,7 @@ fn stop_generator(child: &mut Child, lic: &crate::config::LicenseCheck, log: &Lo
 
 /// A relative licence path is taken as relative to the Wine prefix; an absolute
 /// one is used as given.
+#[cfg(unix)]
 fn resolve_under_prefix(prefix: &str, path: &str) -> PathBuf {
     let p = Path::new(path);
     if p.is_absolute() || prefix.trim().is_empty() {
@@ -345,6 +414,7 @@ fn resolve_under_prefix(prefix: &str, path: &str) -> PathBuf {
 /// The script's `[[ -s FILE ]]`: present *and* non-empty. A zero-byte licence is
 /// as useless as a missing one, and treating it as valid would skip the
 /// regeneration that fixes it.
+#[cfg(unix)]
 fn non_empty_file(path: &Path) -> bool {
     std::fs::metadata(path)
         .map(|m| m.len() > 0)
@@ -381,7 +451,7 @@ pub fn stream(
     });
 }
 
-#[cfg(test)]
+#[cfg(all(test, unix))]
 mod tests {
     use super::*;
     use crate::config::{LicenseCheck, PrefixLink};

src/local_services.rs

@@ -22,6 +22,7 @@ use std::{
     time::{Duration, Instant},
 };
 
+#[cfg(unix)]
 use std::os::unix::process::CommandExt;
 
 use crate::fifa17_capability::{
@@ -433,6 +434,21 @@ impl ServiceSupervisor {
     /// Start `service` only if it is not already usable. Never restarts a healthy
     /// service, and never adopts a foreign one as ours.
     pub fn ensure_running(&mut self, service: Service, spec: SpawnSpec) -> Result<Ensured, String> {
+        // On native Windows the "companion services" are NOT separate processes:
+        // LSX/Origin login and the ProtoSSL cert path are provided in-process by
+        // stp-origin_emu.dll and the version.dll hook once the game runs. There is
+        // nothing for the launcher to spawn or supervise, so report ready.
+        #[cfg(windows)]
+        {
+            let _ = spec;
+            self.log.lock().push(format!(
+                "[launcher] {} is in-process on Windows (stp/hook) — nothing to start.",
+                service.label()
+            ));
+            return Ok(Ensured::Reused);
+        }
+        #[cfg(unix)]
+        {
         let runtime = self.observe(service);
         if runtime.ready() {
             self.log.lock().push(format!(
@@ -460,6 +476,7 @@ impl ServiceSupervisor {
         .map_err(|e| e.to_string())?;
         *self.slot(service) = ManagedService::from_child(child);
         Ok(Ensured::Started)
+        }
     }
 
     /// Stop a service the launcher owns. A foreign process is reported, never
@@ -532,6 +549,7 @@ pub fn spawn(
         cmd.env("OPENFUT_AUTOPATCH_LOG", log_path);
     }
     // Put each companion in its own process group for lifecycle isolation.
+    #[cfg(unix)]
     cmd.process_group(0);
     cmd.stdout(Stdio::piped()).stderr(Stdio::piped());
 

src/preflight.rs

@@ -31,6 +31,7 @@ use std::time::Duration;
 use crate::config::LauncherConfig;
 
 const PROBE_TIMEOUT: Duration = Duration::from_secs(2);
+#[cfg(unix)]
 const PTRACE_SCOPE: &str = "/proc/sys/kernel/yama/ptrace_scope";
 
 #[derive(Debug, Clone, Copy, PartialEq, Eq)]
@@ -86,6 +87,7 @@ impl Check {
 }
 
 /// Run every applicable check. Order is the order the game exercises them.
+#[cfg(unix)]
 pub fn run(cfg: &LauncherConfig) -> Vec<Check> {
     vec![
         ptrace_scope(),
@@ -96,6 +98,16 @@ pub fn run(cfg: &LauncherConfig) -> Vec<Check> {
     ]
 }
 
+/// On native Windows the client-preparation checks (ptrace_scope, the EA
+/// redirector DNAT, `/etc/hosts`) do not apply: there is no host to arm and
+/// routing is entirely the `openfut.cfg` the hook reads. Only the two the game
+/// truly depends on remain: the backend is reachable and the deployed hook
+/// config agrees with the launcher's settings.
+#[cfg(windows)]
+pub fn run(cfg: &LauncherConfig) -> Vec<Check> {
+    vec![backend_reachable(cfg), hook_config(cfg)]
+}
+
 /// Checks that will stop the game working.
 pub fn failures(checks: &[Check]) -> usize {
     checks.iter().filter(|c| c.state == State::Fail).count()
@@ -113,6 +125,7 @@ pub fn warnings(checks: &[Check]) -> usize {
 /// Unconditional. autopatch is a workspace binary that ships alongside the
 /// launcher, so there is no configuration that could make this inapplicable —
 /// every launch runs it.
+#[cfg(unix)]
 fn ptrace_scope() -> Check {
     const NAME: &str = "ptrace_scope (autopatch)";
     match std::fs::read_to_string(PTRACE_SCOPE) {
@@ -127,6 +140,7 @@ fn ptrace_scope() -> Check {
 /// Reading `/proc` in a test would assert facts about the machine running the
 /// suite rather than about this code — and left inline, "any value is fine"
 /// was a mutation no test could catch.
+#[cfg(unix)]
 fn ptrace_verdict(raw: &str) -> Check {
     const NAME: &str = "ptrace_scope (autopatch)";
     let v = raw.trim();
@@ -146,6 +160,7 @@ fn ptrace_verdict(raw: &str) -> Check {
 ///
 /// This tests the *effect* rather than reading firewall rules, so it needs no
 /// privilege and stays honest about what the game will actually experience.
+#[cfg(unix)]
 fn ea_redirect(cfg: &LauncherConfig) -> Check {
     const NAME: &str = "EA redirector IP is redirected";
     let ip = cfg.ea_redirect_probe_ip.trim();
@@ -184,6 +199,7 @@ fn ea_redirect(cfg: &LauncherConfig) -> Check {
 /// So this is a real misconfiguration worth fixing and not a reason to expect
 /// failure. Reporting it as fatal, and then being contradicted by a working
 /// game, is how a checklist trains its user to ignore it.
+#[cfg(unix)]
 fn hostname_mapping(cfg: &LauncherConfig) -> Check {
     const NAME: &str = "EA hostnames point at OpenFUT";
     if cfg.ea_hostnames.is_empty() {
@@ -320,7 +336,7 @@ fn join(ips: &[IpAddr]) -> String {
         .join(",")
 }
 
-#[cfg(test)]
+#[cfg(all(test, unix))]
 mod tests {
     use super::*;
 

src/theme.rs

@@ -299,5 +299,13 @@ fn install_style(ctx: &Context) {
     v.widgets.open.rounding = radius;
 
     style.visuals = v;
-    ctx.set_style(style);
+    // egui 0.29 keeps a separate `Style` per theme (dark/light) and renders with
+    // whichever the theme preference resolves to. `set_style` touches only the
+    // currently-active theme, so a later switch to the other one would drop our
+    // named text styles ("Hero", "Subheading", …) and panic in `TextStyle::resolve`.
+    // Install the full style into BOTH themes and pin the preference to Dark so
+    // the branded look is stable regardless of the host's system theme.
+    ctx.set_style_of(egui::Theme::Dark, style.clone());
+    ctx.set_style_of(egui::Theme::Light, style);
+    ctx.set_theme(egui::ThemePreference::Dark);
 }