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/main.rs

@@ -98,6 +98,40 @@ enum ConfigAction {
         #[arg(long, value_name = "PATH")]
         compat_dir: Option<PathBuf>,
     },
+    /// Add a new launcher to the config
+    AddLauncher {
+        /// Short CLI name (e.g. "heroic")
+        name: String,
+
+        /// Windows exe path relative to drive_c/ (e.g. "Program Files/Foo/foo.exe")
+        #[arg(long, value_name = "PATH")]
+        exe_path: PathBuf,
+
+        /// Display name for menus (defaults to NAME)
+        #[arg(long)]
+        display: Option<String>,
+
+        /// Wine prefix dir (defaults to ~/Games/NAME)
+        #[arg(long, value_name = "PATH")]
+        prefix_dir: Option<PathBuf>,
+
+        /// umu GAMEID (defaults to "umu-NAME")
+        #[arg(long)]
+        gameid: Option<String>,
+
+        /// pgrep -f regex (defaults to escaped exe basename)
+        #[arg(long)]
+        process_pattern: Option<String>,
+
+        /// Optional installer URL
+        #[arg(long)]
+        installer_url: Option<String>,
+    },
+    /// Remove a launcher from the config (leaves its prefix on disk)
+    RemoveLauncher {
+        /// Short CLI name
+        name: String,
+    },
 }
 
 #[derive(Subcommand)]
@@ -173,6 +207,30 @@ fn main() -> Result<()> {
                 let mut c = config;
                 c.set_globals(proton_version, compat_dir)?;
             }
+            ConfigAction::AddLauncher {
+                name,
+                exe_path,
+                display,
+                prefix_dir,
+                gameid,
+                process_pattern,
+                installer_url,
+            } => {
+                let mut c = config;
+                c.add_launcher(
+                    name,
+                    display,
+                    exe_path,
+                    prefix_dir,
+                    gameid,
+                    process_pattern,
+                    installer_url,
+                )?;
+            }
+            ConfigAction::RemoveLauncher { name } => {
+                let mut c = config;
+                c.remove_launcher(&name)?;
+            }
         },
 
         Commands::Service { action } => match action {