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* ui/ux: codify design system and migrate settings to shared primitives Document Readest's design language in DESIGN.md (Adwaita-aligned, e-ink-first, RTL-correct) and migrate every settings panel onto a small set of primitives (BoxedList, SettingsRow, SettingsSwitchRow, SettingsSelect, SettingsInput, NavigationRow, Tips, SubPageHeader). AGENTS.md links to DESIGN.md so contributors land there before inventing new chassis classes. Replace the standalone KOReader/Readwise/Hardcover Config dialogs with a single Integrations panel (Reading Sync + Content Sources sub-pages). The reader's BookMenu now hides each provider until it's configured, and Hardcover's per-book "Enable for This Book" toggle is dropped — there's no auto-sync to gate, so the flag was just extra clicks. Refresh highlight colors (two-trigger swatch + label, translatable default names), background texture / theme color selectors (border-current keeps selection legible on any backdrop), CustomFonts/CustomDictionaries (quiet list-extension style + shared Tips primitive), the OPDS catalog manager (debounced auto-download, right-aligned Browse), Set PIN, and the KOSync conflict resolver. Translate the ~30 new strings across all 33 locales. Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com> * ui/ux: responsive typography, OPDS card polish, deep-link return paths Restore the .settings-content responsive cascade (14px desktop / 16px mobile) the legacy panels relied on by dropping hardcoded `text-sm`/`text-xs` from the new primitives. Secondary text moves to em-relative `text-[0.85em]` so it scales with the parent. Form controls (`<input>`, `<select>`) re-apply the cascade explicitly via the `settings-content` class since browsers don't inherit font-size onto form elements. Extract `<SectionTitle>` primitive (caseless-language aware via `isCaselessUILang`/`isCaselessLang`) and route every uppercase tag-style header through it: BoxedList groups, Reading Sync, Content Sources, Theme Color, Background Image, integration form labels, KOSyncResolver device labels, and the OPDS My Catalogs / Popular Catalogs sections. CJK / Arabic / Hebrew / Indic / Thai / Tibetan locales bump to `1em` since `uppercase` is a no-op on those scripts. Redesign the OPDS My Catalogs cards: whole card becomes the browse trigger (role='button'), edit/delete collapse into a 3-dot dropdown menu, and the sync-status moves to a sub-line under Auto-download so the card height stays constant whether the toggle is on/off or sync data has arrived. Plumb a `from=settings-integrations` URL marker through the OPDS browser so both manual close and auto-close-on-failure (preserved as `router.back()` for transient failures, paired with a new `stashOPDSReturnTarget` helper) return the user to Settings -> Integrations -> OPDS Catalogs sub-page rather than the dialog's top level. Backed by new `requestedSubPage` deep-link store field. Skip the OPDS catalog passphrase prompt when credentials sync is disabled -- `replicaPublish` already drops encrypted fields at the wire, so prompting was both pointless and confusing. Fix `SettingsDialog` calling `setRequestedPanel(null)` inside a `useState` lazy initializer (zustand setter during render -> React warning); move the clear into a one-shot `useEffect`. Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com> * ui/ux: opt Settings into OverlayScrollbars + caseless typography polish Add an opt-in `useOverlayScroll` prop to `<Dialog>` that swaps the body's native `overflow-y-auto` for `<OverlayScrollbarsComponent>` (autohide, click-scroll, no native overlaid bars). SettingsDialog flips it on so the long Layout / Color panels keep a visible, theme-aware scroll track on Android / iOS webviews where native scrollbars auto-hide entirely. Other short-modal callers stay on the native scrollbar. Drop the `uppercase tracking-wider` SectionTitle styling for caseless scripts and pair it with body-weight `font-medium` instead — those typographic effects are no-ops on Han / Hangul / Devanagari / Thai etc., so a plain medium-weight body-size title reads more correctly than a shrunken pseudo-uppercase one. SettingsRow / NavigationRow primary labels follow the same rule (drop `font-medium` in caseless locales since the inherited body weight already carries; CJK fonts bold poorly at body size). Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com> * ui/ux: SettingLabel primitive + KOSyncForm select polish + Tips alignment Add `<SettingLabel>` primitive — caseless-aware row/field label that pairs with `<SectionTitle>` (groups) for per-item labels. Cased scripts get `font-medium`; caseless scripts (CJK / Arabic / Hebrew / Indic / Thai / Tibetan) drop the weight since Han / Hangul / Devanagari etc. bold poorly at body size. No font-size class so it inherits the `.settings-content` 14/16 cascade. Routed through `SettingsRow`, `NavigationRow`, and the ~12 ad-hoc inline `text-sm font-medium` callsites in AIPanel / FontPanel / ColorPanel / IntegrationsPanel / KOSync / Readwise / Hardcover forms. Refactor KOSyncForm's Sync Strategy + Checksum Method rows onto the shared `<SettingsSelect>` primitive — the inline 17-line div/select/ MdArrowDropDown chassis becomes a single SettingsSelect call with an options array. Drops the unused MdArrowDropDown import and ~25 lines. Fix Tips list-item alignment: callers traditionally pass `<li>` elements (semantic) but the primitive was double-wrapping into `<li><span><li>...</li></span></li>` — invalid HTML, and the inner `<li>`'s `display: list-item` broke line-wrap alignment on multi-line items. Unwrap caller `<li>` to its content; add `flex-1` on the text span so wrapped lines align under the first line instead of falling back to the bullet column. Bullet container switches to `h-[1.4em]` so it tracks the text line-height and pins to the first line's optical center via `items-center` regardless of how much the content wraps. DESIGN.md §5 typography updated to point primary-label callers at `<SettingLabel>`. Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com> --------- Co-authored-by: Claude Opus 4.7 (1M context) <noreply@anthropic.com>