Addresses Hoshe's 3 code-quality items from the sprint-36 client review.
- character_creation: drop CARDINAL_NAMES (was [south, east, north,
west]) and use CARDINAL_DIRS ([south, west, north, east]) for both
facing and screenshot filename label. The two arrays indexed by the
same _screenshot_cardinal_idx produced swapped labels at indices 1
and 3 — screenshots at those positions had filenames that did not
match the character's actual facing.
- character_creation: Enter/KP_ENTER now honors _footer_start.disabled.
Without a bookmark selected the Start button disables, but the
keyboard path called _on_start() unconditionally — a player could
confirm creation with empty bookmark/location strings. Guard at the
top of _on_start.
- protocol.gd: raw_bm.get("career", "tycoon") hardcoded a content
default in the wire decoder — a missing server field silently became
"tycoon". Empty string is the correct protocol default;
_make_bookmark_card already skips the career label when empty.
jpmschweitzer
effb83a0d6