Two physical keys now carry all four moves in both clients: `,`/`.` seek 15
seconds, and their shifted forms `<`/`>` skip a whole track. Self-teaching
(same key, shift = bigger jump), and `<`/`>` are the marks engraved on them.
The reason it is these keys and not control chords: they are plain printable
characters, so nothing a browser reserves can swallow them. Ctrl-n — the
long-standing next-track chord — cannot be claimed in a browser at all,
because Chrome and Firefox handle it as "new window" above the page where
preventDefault cannot reach (unlike Ctrl-f, Ctrl-p or Ctrl-b, which the
keydown handler does claim). So the web client had no working next-track key.
Ctrl-n/Ctrl-p stay bound as the terminal's primary chords; the web help
documents the pair that always works.
Click-to-seek on the web progress bar comes with it, and needed no new rpc:
the click maps the pointer's x within the gauge to a fraction of the duration
and sends target - position. Relative is right here even though the gesture
is absolute — the position it subtracts is the one drawn on the bar the user
just aimed at, at most one 250 ms tick old, far under one pixel of the bar.
That staleness is only fatal for a repeated key, which is why keys still send
a fixed step and let the server accumulate.
The arithmetic lives in state.rs as a pure function, so it is tested on the
native target rather than only in a browser: a click behind the playhead
seeks back, the edges are exactly the track's ends, a fraction outside [0, 1]
is clamped rather than extrapolated, and a duration of 0 (or a non-finite
fraction, meaning a zero-width element) declines instead of seeking somewhere
arbitrary. Geometry comes from current_target, since the click may land on
the fill rather than the track.
Also enables the web-sys DomRect feature, without which
Element::get_bounding_client_rect does not exist — caught only by the wasm
build, since cbd-web's `mod app` is cfg'd to wasm32 and native clippy never
sees it.
Verified: 119 cbd-tui, 24 cbd-web (3 new), workspace clippy clean under
-D warnings, fmt clean, wasm bundle and book build. Not exercised: an actual
click in a browser.
Co-Authored-By: Claude Opus 5 (1M context) <noreply@anthropic.com>
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