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/adapter-riscv/src/boot/loader.rs

@@ -39,11 +39,12 @@ pub fn load_init(uart: &Uart) -> LoadedProcess {
 
 /// Storage's budget, carved from init's.
 const STORAGE: Limits = Limits {
-    pages: 256,
+    // A 16-page buffer per client (16), its image and cache.
+    pages: 512,
     endpoints: 2,
     notifications: 2,
-    // A buffer per client (8) and the disk's DMA.
-    regions: 12,
+    // A buffer per client and the disk's DMA.
+    regions: 20,
 };
 
 /// Storage, which init needs to read anything else, its budget carved