feat(k-ui): first slice: App trait + run loop, builders (column/row/text/button), flex layout, theme tokens (Whimsy Dark), tiny-skia + fontdue render (Noto Sans Latin subset), keyboard focus ring; tally demo; manifest memory key (pm spawns with it)

crates/manifest/src/tests.rs

@@ -239,3 +239,13 @@ fn every_capability_name_round_trips_and_fits_the_set() {
         all
     );
 }
+
+#[test]
+fn memory_is_in_kib_or_mib_within_bounds() {
+    use crate::Memory;
+    assert_eq!(Memory::parse("3 MiB").map(|m| m.pages()), Some(768));
+    assert_eq!(Memory::parse("512 KiB").map(|m| m.pages()), Some(128));
+    for bad in ["3MiB", "3 GiB", "17 MiB", "32 KiB", "6 KiB", "-1 MiB", "x MiB"] {
+        assert_eq!(Memory::parse(bad), None, "{bad}");
+    }
+}