Correct the docs against the code

Four removals in a row left both files describing things that are no longer
there, and one claim that was never true:

- The rules screen mock-up still had the transfer column, two commits after
  that column went. The keys table listed 4 twice, once as a view switch and
  once as the tagging row that replaced t; tagging is now a sentence saying
  plainly that no key does it and why 4 is the answer.
- The rule builder mock-up was missing the account field entirely while the
  prose below it described moving between four fields.
- glob was described as linear time with no backtracking. It is the two-pointer
  wildcard match, which backtracks by design -- the branch is right there in
  glob.go -- and is O(n*m) in the worst case. What it actually rules out is
  exponential blowup on patterns like *a*a*a*.
- r on the rules screen was undocumented. It recounts against the index, which
  is what an import makes stale; it does not re-read rules.toml, so an edit
  made elsewhere still needs a restart.

Co-Authored-By: Claude Opus 5 <noreply@anthropic.com>

CLAUDE.md

@@ -13,7 +13,7 @@ This file covers what the code assumes and why.
 cmd/money/main.go     subcommands; the TUI is the default
 internal/config       rules.toml, account.toml, XDG config, data-root resolution
 internal/model        Account, Transaction, amount formatting, description normalisation
-internal/glob         the `*` / `?` matcher used by rules (linear time, no backtracking)
+internal/glob         the `*` / `?` matcher used by rules (two-pointer, no exponential blowup)
 internal/parser       Parser interface + registry; nlb, revolut, traderepublic
 internal/store        SQLite index (modernc.org/sqlite, no cgo)
 internal/importer     directory walk, dedupe, balance checks