A bigger face, and the theme where the settings are

The picture fills the account button now — twenty pixels of a face is a
smudge — and light or dark moved out of the sidebar corner into Account →
Profile, next to the typeface and how a chapter opens, which is the kind of
thing it is.

Moving it made it worth keeping: it was pure screen state, so every reload
landed on dark whatever had been chosen. It is a setting on the account now,
like the typeface, with a copy in the browser so the page does not start in
one theme and turn to the other once the account arrives.

The check I first wrote for the sidebar losing its switch could not fail. It
counts the buttons in that corner instead.

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

CHANGELOG.md

@@ -14,6 +14,27 @@ a rebuild is not bit-identical.
 
 ---
 
+## 2026-08-22 — A bigger face, and the theme where the settings are
+
+**Images** — web `sha256:fe35b0e7…`, server `sha256:a557fb4d…`
+
+The server image changed: `theme` is now one of the settings an account keeps.
+
+**Changed**
+- **The profile picture fills the account button**, 34px instead of 20 — a face
+  at twenty pixels is a smudge — and the same size in the account panel.
+- **Light or dark moved into Account → Profile**, beside the typeface and how a
+  chapter opens, which is the kind of thing it is. It used to be a sun in the
+  corner of the sidebar: reached for by accident, and gone again on the next
+  device. That corner now holds one button, the way into the account.
+- **And it stays.** The theme was pure screen state before, so every reload
+  landed on dark whatever had been chosen. It belongs to the account now and
+  follows you to the phone, with a copy in the browser so a reload does not flash
+  the other one while the account is being fetched. The server takes `dark` or
+  `light` and drops anything else, like every other setting written by a browser.
+
+---
+
 ## 2026-08-21 — Asking for the picture properly
 
 **Images** — web `sha256:4310304d…`, server `sha256:7a486929…`