Add setup tray entry, wizard progress/log, config add/remove, stale-wine check

- tray: uninstalled launchers now show a "Setup…" entry that spawns
  the setup wizard as a child process.
- setup.rs: download shows a progress bar (bytes / total), and
  umu-run stdout+stderr stream into a scrollable log pane. A 250 ms
  tick subscription pulls updates from the shared state.
- config add-launcher / remove-launcher CLI, with sensible defaults
  for prefix_dir, gameid, and process_pattern derived from name/exe.
- diagnose: flag stale wineserver processes when no launcher is
  running, suggesting `umutray kill`.

Co-Authored-By: Claude Opus 4.7 <noreply@anthropic.com>

src/diagnose.rs

@@ -25,6 +25,7 @@ pub fn run(config: &Config, name: Option<&str>) -> Result<()> {
         global_vulkan_check(),
         global_display_check(),
         compat_dir_check(config),
+        wineserver_check(config),
     ];
 
     let launchers: Vec<&Launcher> = if let Some(n) = name {
@@ -124,6 +125,40 @@ fn compat_dir_check(config: &Config) -> Check {
     }
 }
 
+fn wineserver_check(config: &Config) -> Check {
+    let count = wineserver_count();
+    if count == 0 {
+        return Check::pass("wine procs", "no wineserver running");
+    }
+    let any_running = config
+        .launchers
+        .iter()
+        .any(crate::launcher::is_running);
+    if any_running {
+        Check::pass(
+            "wine procs",
+            format!("{count} wineserver process(es); launcher active"),
+        )
+    } else {
+        Check::fail(
+            "wine procs",
+            format!(
+                "{count} stale wineserver process(es) — try: umutray kill"
+            ),
+        )
+    }
+}
+
+fn wineserver_count() -> usize {
+    Command::new("pgrep")
+        .args(["-c", "-f", "wineserver"])
+        .output()
+        .ok()
+        .and_then(|o| String::from_utf8(o.stdout).ok())
+        .and_then(|s| s.trim().parse::<usize>().ok())
+        .unwrap_or(0)
+}
+
 fn launcher_checks(l: &Launcher) -> Vec<Check> {
     let mut out = Vec::new();
     let tag = format!("[{}]", l.name);