feat(desktop): home app (system-only launch cap, LAUNCH_BADGE: apps+launch only), pm starts it with session (relaunch <=5); display keys F1/Alt+Tab next, F2 home, F4 close app (ROLE from launcher, terminal exempt), close returns to previous window; closed window -> app exits; shell 'name &'; launch by id; pm stack 8, storage 16 clients

crates/init/src/manifest.rs

@@ -157,6 +157,8 @@ pub const SESSION: &[Program] = &[Program {
     session: Session::PassOn,
     // Installing waits for the user's consent.
     pinged: false,
+    // A launch (manifest, decision, arguments) is KiBs of stack.
+    stack_pages: 8,
     ..server("permission", b"bin/permission", Limits { pages: 96, ..SMALL })
 }];