Restore the 451 lines of the roadmap the flake note deleted

Commit 3d1b5da replaced the "Known flake" note by slicing the file from
that heading to "## Open questions for the user", on the assumption the
two were adjacent. They are not: between them sit the verification
surface and every stage section -- what each one built, its decisions and
its known gaps. All of it went, and it was pushed.

Restored from the commit before, with only the two intended changes
applied on top: the flake section replaced with its diagnosis, now ending
at the rule that actually closes it, and the HUD and connect-screen rows
the second UI pass meant to add. Every other document was checked for the
same kind of loss against the start of the session; none had any.

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>

CLAUDE.md

@@ -13,7 +13,7 @@ the obvious default.
 
 ```bash
 tools/check.sh      # parse-check every script (~5s) -- run after every edit
-tools/test.sh       # 551 GUT tests, headless (~4s)
+tools/test.sh       # 568 GUT tests, headless (~4s)
 tools/smoke.sh      # real server + 4 bot clients over ENet (~40s)
 tools/server.sh     # dedicated server
 tools/client.sh --listen            # host and play, no menu