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

README.md

@@ -13,7 +13,7 @@ tagged by glob rules you write.
   rules.toml                 # tag rules, in order
   index.db                   # SQLite index (rebuildable; safe to delete*)
   checking/
-    account.toml             # currency + how to parse this bank's exports
+    account.toml             # currency + which parser reads this bank's exports
     2026-01.csv
     2026-02.csv
   savings/
@@ -63,7 +63,7 @@ money                        # open the TUI (default)
 money import                 # extract new transactions from every statement
 money import --force         # re-parse statements even if unchanged
 money retag                  # re-apply rules.toml to everything already imported
-money ls --untagged          # what still needs a tag
+money ls --untagged          # what no rule has claimed yet
 money ls --wide              # also show type and reported balance
 money ls --account checking --month 2026-01
 money report --month 2026-01 # spending by tag
@@ -82,12 +82,15 @@ imported — creating an `account.toml` is not enough on its own. Run
 | --- | --- |
 | `1` `2` `3` `4` `5` / `tab` | accounts · transactions · report · rule builder · rules |
 | `enter` | open the selected account (accounts view) |
-| `4` | write a rule for what you are looking at — the only way to tag |
 | `/` | filter by description |
 | `u` | show only untagged transactions |
 | `a` | clear the account filter |
 | `i` | import · `r` re-apply rules · `q` quit |
 
+There is no key that tags a transaction. Tags come from `rules.toml` and
+nowhere else, so tagging what you are looking at means writing a rule for it on
+`4` — which is why that screen shows you what a glob catches before you save.
+
 ### Rule builder (`4`)
 
 Writing rules by hand means guessing what a glob will catch. This screen shows
@@ -103,6 +106,12 @@ a `▸` against each one the glob currently matches and a running
 ╰────────────────────────────╯   ▸  LIDL SOFIA 4412                 2
   vs. the description            ▸  LIDL VARNA 9911                 1
                                     ZARA MLADOST                    1
+  account
+╭────────────────────────────╮
+│ blank = every account      │
+╰────────────────────────────╯
+  blank = all accounts
+
 ▸ tag
 ╭────────────────────────────╮
 │ groceries                  │
@@ -148,7 +157,7 @@ Rules that claim none are marked `✗`.
 ```
 money · rules · 5 rules · 2 match nothing
 
-#      Pattern                Account     Tag         T  Txns  Note
+#      Pattern                Account     Tag         Txns  Note
 1      *LIDL*                 (all)       groceries    3     the weekly shop
 2   ✗  *LIDL SOFIA*           (all)       shadowed     0
 3   ✗  *OLD BANK NAME*        (all)       dead         0     closed in 2025
@@ -163,7 +172,10 @@ can therefore reach zero either by matching nothing or by being shadowed, and
 both are worth deleting.
 
 `d` deletes the selected rule, `p` deletes every rule marked `✗` at once, and
-both ask for a `y` first. Deleting edits `rules.toml` textually, so your
+both ask for a `y` first. `r` recounts against what is currently in the index,
+which is what you want after an import has added rows; `rules.toml` itself is
+read at startup and whenever you save a rule from the builder, so an edit made
+in another window needs a restart. Deleting edits `rules.toml` textually, so your
 comments, ordering and formatting survive; a comment sitting directly above a
 deleted rule goes with it, while one separated by a blank line is treated as a
 section heading and left alone.