* feat(downloads): make chapter download cooldown configurable
The chapter download service used a hard-coded 1s sleep between
sequential chapter writes. That worked as a polite default but is
either too long for users with patient sources or too short for
sources that 429 on tight loops. Surface the value as a single
global setting instead.
- AppSettings.chapterDownloadCooldownMs (optional, ms)
- getChapterDownloadCooldownMs(): synchronous fallback used by the
background task runner; returns the historical 1000ms when the
user has not configured an override (no regression on upgrade)
- downloadChapter.ts: sleep(getChapterDownloadCooldownMs()) replaces
the previous hard-coded sleep(1000)
- New "Chapter download cooldown" entry in General Settings, placed
directly above "Disable haptic feedback". Tapping opens a modal
that takes seconds (decimal allowed) and writes back as ms
- The input is sanitised on every keystroke to digits + a single
decimal point so paste / hardware keyboard input cannot smuggle
in non-numeric characters
- Reset writes the default explicitly so the user sees feedback
even when the override happened to equal the default
* feat(downloads): warn about source rate limits in cooldown modal
Per review feedback (#1834): the cooldown modal should make the
trade-off explicit so users don't lower the value below what their
sources can take. Add a single error-coloured line under the input.
Jeon JaeHyeong
5d996f1388