Polish every dashboard page and strengthen shared presentation

[mohsinht]

Why

The page structure was broadly useful, but supporting cards stretched into empty panels, calendar entries looked like a plain list, and static content moved on hover. Component discovery also required scrolling through the entire catalog.

Changes

• Consistent bounded page frame, neutral workspace surface, clearer active navigation, and compact headers.
• Calendar date tile, timezone, start/end labels, derived durations, locations, and chronological ordering with all-day events first.
• Numbered queues, continuing numbering through expanded items, item counts, more readable table rows, and content-sized supporting panels.
• Editorial typography keeps controls and data sans-serif. Remove hover lift and timeline marker scaling from static content.
• Use existing shadcn Tabs and Input for Component Lab categories and intersecting search, with empty-result and clipboard failure feedback.
• Turn briefing questions into a list and make weekly reply suggestions respect explicit deadlines. Keep a meaningful timeline example in the component catalog.
• Refresh all 28 source-page screenshots in desktop/mobile and light/dark, plus the README preview. Document the nine-page review.

Validation

• npm run check passed, including 56 tests, coverage, strict build, contracts, privacy, repository policy, tutorial, performance, and accessibility.
• Accessibility matrix: all nine pages at 320, 390, 768, 1024, and 1440px in light/dark, plus palettes, dialogs, chart interactions, and reduced motion.
• Visually reviewed all nine pages across desktop/mobile and light/dark. Verified catalog category/search intersection and empty results in Chromium.
• JavaScript 112 KB gzip, CSS 10 KB gzip, dashboard data 89 KB gzip, within existing budgets.
• Published Git tree matches the locally tested tree.

No new dependencies or snapshot schema fields. Screenshots and fixtures are synthetic. Visual review and automated axe checks do not replace physical-device or screen-reader testing.

Preview screenshots: Today, Agenda, Money.

[mohsinht]

Follow-up fixes are now on this PR.

• Fixed the CI coverage failure. Provider subprocesses no longer inherit NODE_V8_COVERAGE, so intentionally terminated test children cannot leave partial V8 coverage JSON behind.
• Fixed the large desktop whitespace gaps shown on Money with shared dashboard packing. At 1280px and above, intrinsic-height dashboard cards now pack into the available columns with the existing 20px vertical rhythm instead of being trapped by the tallest card in a CSS grid row.
• The layout fix is shared by every dashboard presentation page, not special-cased to Money. Focus, timeline, and smaller responsive layouts keep their existing flow.
• Latest head: ba9d26cd609894abcdf1b663e9efb26e7bd3a4fa.
• GitHub CI, CodeQL, and Dependency Review all pass on the latest head.