feat(WhereUI): add Folio and Quiet Glass themes

[kyleve]

Posted by an AI agent on kve's behalf.

Summary

• turn the foundation's standard identity into a restrained Quiet Glass presentation and its alternate identity into the editorial Folio presentation
• preserve Quiet Glass as the default while making Folio an explicit user choice
• apply the visual distinction across Locations, Calendar, Timeline, Your Year, launch, privacy, evidence, widgets, snippets, and feature discovery
• preserve ordinary Settings rows and icon-chip colors, native navigation, domain semantics, and persistence formats

Quiet Glass (standard)

• retain the familiar Liquid Glass direction with mist/charcoal surfaces, system typography, restored card rosettes, softer ornament, and no record indices
• use native glass materials on region cards, calendar sheets, timeline records, the annual cover, Elsewhere, widgets, and snippets
• remain the default for existing installations and for missing or unknown stored theme values

Folio (alternate)

• rebuild Locations as an editorial recorded-year folio with ranked paper records, provenance details, and a focused card-to-calendar destination
• turn Your Year into a midnight annual-ledger cover that expands into ledger detail while preserving Calendar/Timeline controls
• use warm paper, midnight stock, serif headings, tabular figures, enamel region ink, the W-and-meridian seal, and restrained archival ornament
• extend that identity to launch, onboarding, privacy, export preparation, evidence, widgets, snippets, and feature discovery

Review focus

• the distinction between Folio and Quiet Glass on Locations, Calendar, Timeline, and Your Year
• readability and hierarchy in both light and dark appearances
• the theme specimens in onboarding and Appearance Settings
• perceived hero-transition cadence on physical 60 Hz and 120 Hz hardware

Testing

• ./swiftformat --lint
• ./xcstrings --lint
• ./test --everything — 1,849 unit/integration tests and 49 snapshot suites passed
• manually reviewed Standard/Glass and Alternate/Folio references across light, dark, increased contrast, RTL, standard Dynamic Type, and accessibility Dynamic Type

Stack

• Depends on Add Where multi-theme foundation #244, which adds the neutral multi-theme storage, model, selection, widget, and App Intent foundation.
• This PR is intentionally based on codex/where-theme-foundation; its diff contains the visual Glass/Folio divergence and design-specific tests/assets.
• Merge Add Where multi-theme foundation #244 first. Do not merge this PR until the visual direction is approved.

[kyleve]

Going to close this out as it was mostly an experiment; the infrastructure portion has been merged.