feat(glass): per-scheme background images + glass-over-image mode

Land the UAT-approved backdrop direction as a real feature (replacing the dev
thumbnail prototype):
- 6 generated abstract SVG backdrops in public/backdrops/, one tuned to each
  accent scheme (dark, mixed-colour, few light areas). Non-figurative + generated
  = repo-safe, tiny, accent-matched.
- New data-backdrop="on" state (dark theme + the setting + not perf) paints the
  per-scheme image on <body> (app root now transparent so it shows app-wide and
  the glass refracts it) AND switches the glass to its translucent tier (the
  user's tuned values: surface 50 / card 60 / scrim 30 / blur 10 / edge 25).
  Off / light / perf -> flat colour + solid glass (the readable fallback).
- Settings > Appearance 'Background image' toggle (bgImage pref, dark-only),
  trilingual. Flat is the fallback + opt-out.
- Remove the FeedBackdrop prototype + its tuner controls; tuner baseline resynced
  to the glass-over-image tier, add a Backdrop-fade slider.
GOTCHA fixed: the dark-mode ambient 'background' shorthand reset background-size
to auto (image rendered un-covered); out-specified it with [data-theme="dark"].
This commit is contained in:
npeter83 2026-07-12 21:20:40 +02:00
parent 036e2fe7ea
commit f9f90cf609
15 changed files with 191 additions and 162 deletions

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@ -33,6 +33,8 @@
"colorScheme": "Farbschema",
"display": "Anzeige",
"darkMode": "Dunkler Modus",
"backgroundImage": "Hintergrundbild",
"backgroundImageHint": "Zeigt ein dezentes, themenbezogenes Hintergrundbild hinter der App, damit die Glasflächen etwas zum Brechen haben. Nur im dunklen Design; aus = einfarbig.",
"listView": "Listenansicht",
"listViewHint": "Zeigt den Feed als kompakte Liste statt als Kartenraster an.",
"performanceMode": "Leistungsmodus",

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@ -33,6 +33,8 @@
"colorScheme": "Color scheme",
"display": "Display",
"darkMode": "Dark mode",
"backgroundImage": "Background image",
"backgroundImageHint": "Show a subtle per-theme backdrop image behind the app so the glass surfaces have something to refract. Dark theme only; off = flat colour.",
"listView": "List view",
"listViewHint": "Show the feed as a compact list instead of a grid of cards.",
"performanceMode": "Performance mode",

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@ -33,6 +33,8 @@
"colorScheme": "Színséma",
"display": "Megjelenítés",
"darkMode": "Sötét mód",
"backgroundImage": "Háttérkép",
"backgroundImageHint": "Halvány, témánkénti háttérkép az app mögött, hogy az üveges felületeknek legyen mit megtörniük. Csak sötét témában; kikapcsolva sima szín.",
"listView": "Listanézet",
"listViewHint": "A hírfolyam kompakt listaként jelenik meg a kártyarács helyett.",
"performanceMode": "Teljesítmény mód",