feat: e on the status pane edits the config, as in lazygit

Instead of a global E: e on the status pane opens the config, shown
in its footer as "e edit config".

Co-Authored-By: Claude Opus 5.5 (1M context) <noreply@anthropic.com>

docs/keys.md

@@ -59,7 +59,6 @@ match case exactly.
 | `x` | [custom commands](custom-commands.md) |
 | `L` | sign in again (shown when a login has expired) |
 | `U` | a newer lazysecrets: its changelog, and update in place (restart to use it); or look for one |
-| `E` | edit your [config](config.md), like `e` opens a file (made if it isn't there yet; restart to use it) |
 
 A revealed value is shown as it reads best: JSON indented, and PEM
 certificates as their subject, issuer, dates, names and thumbprint, with
@@ -123,7 +122,8 @@ Secrets. Going into it (`l`, or `4`) keeps it on that; there `j`/`k`,
 it's hidden.
 
 On top, the status pane (`0`) shows the version, a newer release and how
-your accounts are doing. Focused, the right pane lists more under the
+your accounts are doing; `e` there opens your [config](config.md) in your
+editor, as in lazygit. Focused, the right pane lists more under the
 logo (when there's room): the version and updates (`U`), each account
 (`L` on one that needs it signs in), what's expiring (`enter` goes to
 it), this session's errors, newest first (what a pane showed, or the