docs: the 0.3.0 backlog, from testing 0.2.6.1

Wonder Ink's next interface, the PDF viewer's Download and second Print,
readable worksheet names, a tab's sound indicator, the popup that Chrome
does not show, session retention, and the site's weight; Presentations
as a maximisable tile grid with click-to-advance and a hidden pointer;
the launcher's subtitles and Parent Call's flash. Recorded, not built.

Co-Authored-By: Claude Opus 5.5 <[email protected]>

docs/backlog.md

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+# Backlog — 0.3.0 and later
+
+Recorded after hands-on testing of 0.2.6.1 in September 2026. **None of
+this is in 0.2.6.2**, which is limited to picture printing, the
+Presentations memory failure and the settings lockdown. Each item says
+what was observed, so whoever picks it up starts from the evidence.
+
+## Wonder Ink
+
+- **An interface like Chrome's, visibly the classroom's.** Familiar tabs
+  and back/forward/reload, without an address bar, new-tab button or
+  anything that takes a teacher somewhere the lesson did not. The 0.2.6.1
+  tab strip is a step towards it, not the design.
+- **The PDF viewer's own Download button.** It saves a copy, which the
+  download handler then opens as another worksheet tab. Remove it, or
+  intercept the download from a worksheet tab so it does nothing visible.
+  (0.2.2 already skips re-opening a save from a worksheet tab — see
+  `from_worksheet` in `on_download` — so check first which route it now
+  takes.)
+- **One Print, not two.** A worksheet tab has the viewer's printer icon
+  and Wonder Ink's Print; both now open the same preview, but a teacher
+  sees two buttons. One teacher-facing workflow.
+- **Readable worksheet names.** Tabs show the downloaded file's name,
+  which for many worksheets is a long generated prefix. Strip it, or take
+  the name from the PDF's own title.
+- **A speaker on the tab that is playing sound** (`QWebEnginePage.recentlyAudible`).
+- **Linked lesson text opens an intermediate popup** instead of following
+  the link, where Chrome follows it directly. Investigate: probably a
+  site script choosing `window.open` for a gesture Wonder Ink reports
+  differently, or `createWindow` being asked for a popup type we treat as
+  a tab.
+- **Session retention.** Today closing Wonder Ink signs the teacher out
+  (session-only cookies). Wanted: recover from an accidental close, but
+  expire after a configurable period of inactivity, including across
+  restarts. Needs a design that never leaves one teacher signed in for
+  the next — and first, a real account to measure where the site keeps
+  its sign-in: 0.2.6.1 found cookies do clear on close, but the profile's
+  Local Storage persists, and whether the site stores its token there has
+  never been tested.
+- **The site's sluggishness, where it is ours.** Measured in 0.2.6.1:
+  Wonder Ink and Chrome take the same time (about 2.9 s cold) and the
+  site is the weight — 119 – 160 requests, 3.2 MB, the Google Maps API
+  loaded twice. Ours to look at: whether a classroom's QtWebEngine has its
+  GPU (`classroom-wonderink --diagnose` on the machines), and the page
+  shell being revalidated on every warm load (62 – 87 ms).
+- **The browser is scaled twice** under Plasma (dpr 2.25 at 150%):
+  `classroom-browser` forces `UI_SCALE` on a Chrome that already follows
+  the compositor. Deliberately left in 0.2.6.x because teachers know that
+  size, and Wonder Ink was matched to it. Decide once, for both.
+
+## Presentations
+
+- **A normal, maximisable application** instead of the small floating
+  library window.
+- **Consistently sized tiles in a responsive grid.**
+- **No unnecessary internal scrollbars or stretched layouts.** 0.2.6.2
+  had to give a row extra height by hand when a card carries the
+  memory-failure message; the layout should size to its cards.
+- **Keep the window's size and position** when importing a presentation
+  or changing a cover.
+- **Click the slide to advance.**
+- **Hide the pointer after a moment of stillness while presenting**, and
+  bring it back on movement.
+- **Keep the keyboard controls**, and never advance when a playback
+  control itself is clicked.
+- **Remote control of a presentation** — later than 0.3.0.
+
+## The launcher and Parent Call
+
+- **Remove the subtitles under DVD and Presentations** on the launcher.
+- **Parent Call appears among the ordinary applications for a moment and
+  then disappears**, which looks like a crash. Keep it reachable through
+  its background or notification route without it flashing up as a
+  window.
+
+## The settings lockdown
+
+- A notification's **Configure** button still shows, and opens a small
+  "module disabled" window (0.2.6.2). Hiding it needs a change to Plasma's
+  notification applet, not configuration — revisit if Plasma gains a
+  Kiosk key for it.
+- The settings-module list is per Plasma release. `tools/lab/converged-check`
+  fails when a new one appears; the list in `config/plasma/xdg/kdeglobals`
+  then needs the new name.