Redesign Media Centre as a teletext broadcast information service

Replaces the neutral dark card-based theme with "Page 100": teletext's
locked eight colours at full saturation on pure black, numbered pages
reachable by typing the number (or the r/g/y/c fastext keys), and no
borders, boxes, or radius anywhere — grouping is carried by full-bleed
colour fields and row weight instead.

Chosen via the impeccable skill's replacement-world flow: seven visual
candidates derived from the audience's own world, a mandatory roll
assigned Ceefax/US-cable-guide teletext, six catalog challengers weighed
against it, and the user locked the assigned direction on the decision
page (seed aab4510e).

- New templates for all nine pages (home/watch/library/discover/
  requests/system/activity/login/settings) behind a shared _shell.html
  carrying the direction contract and _macros.html for the row/bar/tile
  vocabulary; deletes the old single-page dashboard.html and its
  dedicated stylesheets/script.
- static/css/base.css + teletext.css: the locked palette, a two-height
  type scale (Chivo Mono / DotGothic16), and the five disciplines the
  system is held to (no in-between tone, no enclosure, one shared bar
  ruler, trend only where real history exists, pages weighted by state).
- static/js/service.js: header clock, page-number jump, fastext keys,
  two-tap arm/confirm add, guarded live polling — replaces dashboard.js.
- app.py: nav_items now carry page numbers; fastext defaults added to
  the page-chrome context processor; version bumped to 2.0.0.
- DESIGN.md + .impeccable/design.json regenerated from the built world
  by the documenter pass; PRODUCT.md and CLAUDE.md updated to describe
  the new system in place of the retired one.
- Fixed a live bug found along the way: settings.html called
  url_for('dashboard'), an endpoint removed earlier in the branch, which
  would have 500'd the Settings page.
- Fixed a One-Ruler violation the finish review's recapture request
  surfaced: --bar-cells disagreed with the bar() macro's hardcoded cell
  count below the 760px breakpoint, so a fill could land mid-cell on a
  phone. Removed the mobile override; the ruler is now 20 cells at every
  width, matching the macro unconditionally.

Passed two inspection rounds (desktop + true-390px mobile, via an
iframe harness since macOS Chrome clamps --window-size) and a finish
review; QA screenshots and interview logs are gitignored as scratch,
not shipped in the repo.

Co-Authored-By: Claude Opus 5 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01NBw1QodG8ZMYHrGeQfqyDS

.gitignore

@@ -8,3 +8,9 @@ __pycache__/
 # git too so credentials can't be committed by accident.
 settings.json
 data/
+
+# Impeccable QA/decision-page scratch — screenshots and interview logs from
+# a design pass, not project source. .impeccable/design.json (the design
+# system sidecar) is tracked deliberately, alongside DESIGN.md.
+.impeccable/review/
+.impeccable/questions/