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/config.rs

@@ -61,6 +61,21 @@ fn default_proton_version() -> String {
     "GE-Proton".into()
 }
 
+fn regex_escape(s: &str) -> String {
+    let mut out = String::with_capacity(s.len() + 4);
+    for c in s.chars() {
+        if matches!(
+            c,
+            '.' | '*' | '?' | '+' | '(' | ')' | '[' | ']'
+                | '{' | '}' | '|' | '\\' | '^' | '$'
+        ) {
+            out.push('\\');
+        }
+        out.push(c);
+    }
+    out
+}
+
 /// The six launchers umutray ships out of the box. `exe_path`, `gameid`,
 /// and `process_pattern` are best-effort defaults for typical installs —
 /// users can adjust per-launcher via `umutray config edit`.
@@ -231,6 +246,60 @@ impl Config {
         Ok(())
     }
 
+    #[allow(clippy::too_many_arguments)]
+    pub fn add_launcher(
+        &mut self,
+        name: String,
+        display: Option<String>,
+        exe_path: PathBuf,
+        prefix_dir: Option<PathBuf>,
+        gameid: Option<String>,
+        process_pattern: Option<String>,
+        installer_url: Option<String>,
+    ) -> Result<()> {
+        if self.launchers.iter().any(|l| l.name == name) {
+            anyhow::bail!("launcher '{name}' already exists");
+        }
+        let display = display.unwrap_or_else(|| name.clone());
+        let prefix_dir = prefix_dir
+            .unwrap_or_else(|| home_dir().join("Games").join(&name));
+        let gameid = gameid.unwrap_or_else(|| format!("umu-{name}"));
+        let process_pattern = process_pattern.unwrap_or_else(|| {
+            exe_path
+                .file_name()
+                .and_then(|s| s.to_str())
+                .map(regex_escape)
+                .unwrap_or_else(|| name.clone())
+        });
+        self.launchers.push(Launcher {
+            name: name.clone(),
+            display,
+            prefix_dir,
+            exe_path,
+            gameid,
+            process_pattern,
+            installer_url,
+            proton_version: None,
+        });
+        self.save()?;
+        println!("\x1b[1;32m✓\x1b[0m Added launcher '{name}'.");
+        Ok(())
+    }
+
+    pub fn remove_launcher(&mut self, name: &str) -> Result<()> {
+        let before = self.launchers.len();
+        self.launchers.retain(|l| l.name != name);
+        if self.launchers.len() == before {
+            anyhow::bail!("no launcher named '{name}'");
+        }
+        self.save()?;
+        println!(
+            "\x1b[1;32m✓\x1b[0m Removed '{name}'. \
+             The Wine prefix on disk was left untouched."
+        );
+        Ok(())
+    }
+
     /// Update global fields non-interactively, then save.
     /// Use `config edit` for per-launcher changes.
     pub fn set_globals(