NeuInk 0.3.0

The NeuInk interface: the Vega theme, a rebuilt reader menu, Battery and Storage pages, apps, and a USB prompt. The
new screens are in FEATURES.md. Reading stats, books and settings carry
over; the Battery history and the per-app times start empty once.

• USB: a computer at the other end of the cable (not a charger) is detected, and the reader asks once per
  connection whether to open the SD card as a USB drive; saying no, or leaving USB mode, silences it until the
  cable has been out for ten seconds. X4 Pro: enumeration by the host (tud_mounted); other S3 boards: USB
  start-of-frame packets.
• Reader menu: a floating gray card like the Home layout panel (white pill rows, tabs as a black pill, a round back
  button); orientation and paragraph alignment are rows of picture buttons in the Layout list, no longer
  behind a submenu (the orientation buttons are one device icon turned in 90 degree steps). Sliders are the
  Control Center's level sliders with round - and + buttons (panel::levelSlider, shared with the quick settings
  panel). Other short choices that fit become a row of buttons; the picked entry of a list is black. The reader's
  status bars use the header's level-box battery, smaller.
• Icons: the toolkit turns any icon in 90 degree steps, so the chevrons (left, up, down), the double chevrons and
  the down arrow are the one right-facing icon, turned, instead of a copy each. The reader menu's icons are
  Lucide; the five style-B tab icons and their generator code are gone.
• Settings > Battery and Storage have an icon and a title in the title bar.
• Settings > Storage (between Battery and Network): the SD card's used space in large type and one rounded, segmented
  bar in four grays for Books, Images and screenshots, Fonts and dictionaries, App data and caches, and Other, with a
  row per category and what is free. The page opens at once; "--" and a spinner on the bar stand in until the scan,
  which runs in the background, is done. The SD card and used-space rows left About.
• Settings > Battery: the charge in large type, two runtime estimates (screen on, from the loss between neighbouring
  points; asleep, from the loss across the gaps where the reader slept), and no explanatory text under the graph.
• Battery graph and the time and charge per app survive software restarts (RTC_NOINIT instead of RTC_DATA, which
  a restart resets) and, through a 0.6 KB copy in /.crosspoint/usage.bin written before sleep and before an OTA or SD
  update restarts, a power-off or a flash.
• Vega Home: swipe up from the bottom edge for a layout panel (icon size 24/32/42/48, icon shape squircle,
  rounded square, circle or hexagon, grid 4x3/4x4/3x4/3x3, names on or off, and an experimental true gray
  for the plates). Library: Recently Opened lists never-opened books after the recent ones, by title; grid
  covers and page dots are round. Settings: rows keep a fixed size and scroll, and are ordered General,
  Display, Reader, Battery, Storage, Network, Dictionaries, Controls, Library, Apps, Stats, About.
• X4 Pro: Settings > Battery shows the charge level, a graph of the last 24 hours (a point every five minutes)
  with an estimate for the next 24, the time spent in the reader and each app today and over the last week, and
  the percent of charge each costs per hour (the loss between two gauge reads goes to what was in front; screen
  changes, charging and sleep never count). It takes the levels from the reads the status bar already does: no
  extra gauge reads and nothing during deep sleep. About 0.8 KB of RTC memory.
• Games: fixed the broken Chess, Checkers and Go boards (the board now fits the screen),
  black chess pieces are filled with gray and outlined, "New" in the title bar is a plain tap
  (nothing resets until Start), and the new-game popup has a rule above Start and Cancel.
  Highlights uses gray squircle icons and a gray Study button. Book-cover corners line up
  with the new dither phase again.
• New default UI theme, Vega: the last opened book as a card (cover, title, author, pill
  progress bar) over a paged grid of light-gray squircles for every Home action and app.
  Swipe or use the buttons to change page. Only this theme lists the apps on Home, with
  short names (Files, Stats) and two-line names where needed. On touch readers an icon lights
  only while pressed, and the selection shows only while the buttons are in use. Its title
  bars (File Manager, Library, Settings, apps...) are light gray, taller, without the black
  underline, and show the app's icon. Lists in the other apps (Settings, File Manager,
  Library...) also show a selected row only while the buttons are in use. The status bar has
  a bigger clock, a Wi-Fi icon while Wi-Fi is on (Lucide wifi when joined, wifi-zero while
  joining), and a new battery: no outline, rounded, light-gray empty part, the percentage
  without its sign inside it. The reader's own status bar is unchanged.
• App and Home icons are Lucide. 24 px is Lucide's own grid, pixel-exact (title bars, Wi-Fi);
  squircles and tiles use 32 px, where the Library's pillars and the Stats bars are moved onto
  whole pixels so their gaps are equal.
• Settings: each group's icon sits on a light-gray squircle (all Lucide now) with a smaller
  description under the title; new About page (version, build, device, chip, memory,
  battery, uptime, reading totals; the SD card moved to Storage), which replaces the version line under the group list;
  Apps has its own entry; General is split into Date and time and Software updates.
• Shared UI components: switches are a rounded track with a round knob (light gray off,
  dark on, knob inverted); a value is now a size smaller than its label; submenu rows show a
  chevron icon instead of ">". Dictionaries, the Apps options and About are made of the
  shared list instead of their own drawing code (the Apps screen's own boxes, switches and
  buttons are gone; the games keep theirs). Dictionaries: Remove language is a row now
  instead of holding a language chip.
• Vega's Home does a half refresh when entered from another screen, and after every sixth
  fast refresh within Home, since its gray areas ghost.
• Settings > Display and Reader are grouped into submenus (Display: Status bar, Screen refresh; Reader:
  Content, Reading aids, Word lookup); Disable touchscreen moved to Controls > Taps and gestures.
• The quick settings pane: round light-gray buttons with Lucide icons, the sliders are rounded boxes
  (light gray, dark up to the level, the percent inside) and the +/- buttons only show while the buttons
  are being used.
• The Clock app has no title or status bar (a round exit button on touch screens).
• Wi-Fi's status bar icon updates when joining or dropping (a comparison in the main loop, no polling).
• About: the SD card's used space is worked out on request (it reads the whole FAT).
• Switches in reader menus use the 50% gray, which survives the reader's refresh; the File Browser
  settings and the reader drawer use the same switch as the lists now.
• Reading Stats opens a list first: "All Books" on top, then every recent book with its progress, so
  the stats to see are chosen first. The stats pages use rounded light-gray tiles and rounded bars
  instead of outlined boxes; the shared action buttons (e.g. the Wi-Fi prompts) follow the same look.
• Chess pieces are Lucide (48 px on the board, 24 px for the captured pieces): the outline is the
  white piece and the same shape filled in is the black one. That is about half the size of the old
  Noto bitmaps (4.3 KB, was 8.9 KB). The checkers crown is Lucide's too.
• The status bar's "on but not joined" Wi-Fi icon is Lucide's crossed-out Wi-Fi (the single dot was
  too easy to miss). The title bars' trailing icons (File Manager, Library, OPDS) are Lucide and sit
  on the title's line. The quick settings pane has no outline. Vega's Home does a half refresh after
  the pane closes. The games' controls keep a larger gap to the foot of the screen.
• File Manager and Library: every file type and the menus' icons are Lucide, on gray squircles in the
  lists; the File Manager's path is a gray pill with a folder icon and its File Transfer button is a
  gray rounded button; the Library's sorting controls sit on a gray pill instead of between two rules.
  There is one icon lookup now (homeIconSet.h) instead of three, so Lyra's and the Cover Grid's menu
  icons are Lucide too; appsIcon.h and its generator are gone.
• The File Transfer menu has Lucide icons on gray squircles. The quick settings pane is one light-gray
  surface with white controls (no shadow or outline). The Library has air between its title bar and
  the sort pill; Chess and Checkers shrink their board to keep the buttons clear of the screen's foot.
• Black chess pieces are the Lucide icon inverted: a black body with the outline in white.
• Fixed: a gray rounded box now has the same corners wherever it sits (the 25% dither is anchored to
  the box's own corner instead of the screen's, so a corner no longer loses pixels by parity). Lists
  draw no selected row while a touch screen is not in button use, also in the File Manager, the Library
  and the File Transfer menu (a flag in the list component, not an index the caller must clear).
• Fixed: the quick-settings panel drew a gray bar at the top; the book card's top rows were
  painted over by the Home header.
• File Transfer is now part of the File Manager (its settings page) and no longer a Home
  entry in any theme; "Browse Files" is now called "File Manager" (German: Dateimanager).
  A File Transfer button sits under the title bar of the File Manager (touch readers); the
  power-button shortcut and Quick Actions still start File Transfer directly.
• The apps list is one shared registry (activities/apps/AppRegistry.h). The Apps screen
  has small tiles with 32 px Lucide icons; the large drawn icons and the 84 px chess
  knight bitmaps and the drawn tool-button icons (undo, hint, flip, erase, notes, fill) are
  gone: all use Lucide icons. The Clock icon no longer shows today's date. Settings has its
  own Apps entry (show or hide apps, Clock and Sudoku options). The Clock's Persian date is
  off by default.
• The Highlights icon is now an outline (Lucide highlighter) in every theme.

Makes the firmware smaller. The X4 Pro firmware was at 6.29 MB of its 6.55 MB update
slot (96%), and online (OTA) updates only work while the image fits that slot, so every
new feature was closer to making updates impossible. This release removes or trims
features to get room back; each item says why. The image is now 6.07 MB, 217 KB smaller, leaving
482 KB free.

• Removed Wordle (about 65 KB): the game, its 22,000-word list and its tests. It was the
  largest single feature that is not part of reading. Sudoku, Chess, Checkers, Go, Tic
  Tac Toe and the Clock stay. The numbers of the apps in the saved hide/resume files are
  unchanged, so nothing else needs resetting. An old wordle.bin on the SD card is
  ignored and can be deleted.
• Hyphenation now ships for English and German only (about 117 KB saved). The patterns
  for French, Spanish, Italian, Polish, Portuguese, Russian, Swedish and Ukrainian are no
  longer built into the firmware; books in those languages are laid out without
  hyphenation, which only changes where long words break at line ends. German is the
  largest pattern set (206 KB) and stays because NeuInk's main use is English and German
  books. The generated pattern files are still in the tree, and building with
  -DNEUINK_HYPHENATION_ALL=1 brings every language back.
• The Persian font supplement (Vazirmatn, about 35 KB) is now optional at build time. The
  X4 Pro build leaves it out with -DNEUINK_PERSIAN_FONTS=0; remove that flag to put it
  back. Without it, Bitter and Lexend Deca have no Persian or Arabic letters of their
  own, so Persian books use an installed NotoVazir from the SD card, as they did before
  1.3.1. Persian menus, keyboard, dictionary and right-to-left layout are unchanged.
  The reason: it duplicates NotoVazir, which can live on the SD card instead of in flash.

Install: copy firmware-x4-pro.bin to the SD card and use SD Card Firmware Update in Settings, or update online from 0.2.0 (Check for Updates). Back up the card first. Coming from CrossPoint or CrossInk usually keeps all data; see the README.