1.2.53

Bump to v1.2.53 — Two switches that read as two switches

The tab bar's Read/Edit and Visual/Raw toggles sat side by side as four
same-looking squares, and after Read took the eye, Visual was an eye as well —
two identical icons a few pixels apart meaning different things.

Each toggle is now drawn as a switch: a faint track with the active side
raised as its thumb (white in light mode, a lighter tint in dark, where the
page background is too close to the tab bar to read as raised). A thin rule
separates the pair, so it's clear which two icons belong together. Visual
takes Lucide's `type` glyph — formatted text — leaving the eye to mean Read
alone; Settings and the command palette follow suit. Both toggles now carry a
tooltip naming the current mode and the shortcut.

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