refactor: solid leaderboards (@fehmer)

[fehmer]

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[Copilot]

Pull request overview

Refactors the legacy Leaderboards page implementation to a SolidJS-based page composed of smaller components, backed by @tanstack/solid-query queries and new URL-param handling.

Changes:

• Replaces the old imperative pages/leaderboards.ts + HTML/CSS with a Solid LeaderboardPage and componentized UI.
• Adds Solid Query-based leaderboard/rank fetching with a typed Selection model and query keys.
• Introduces a global userId signal (fed by Firebase auth state) for selection/highlighting and logged-in UI.

Reviewed changes

Copilot reviewed 30 out of 30 changed files in this pull request and generated 5 comments.

Show a summary per file

File	Description
frontend/src/ts/utils/format.ts	Narrows Formatting’s config dependency + exposes typingSpeedUnit getter.
frontend/src/ts/signals/core.ts	Adds global userId signal + isLoggedIn memo.
frontend/src/ts/queries/leaderboards.ts	New Solid Query options + selection schema for leaderboard requests.
frontend/src/ts/pages/page.ts	Exports UrlParamsSchema type for reuse.
frontend/src/ts/pages/leaderboards.ts	Removes legacy leaderboards page implementation.
frontend/src/ts/modals/simple-modals.ts	Removes legacy leaderboard “go to page” modal wiring.
frontend/src/ts/modals/simple-modals-base.ts	Removes lbGoToPage popup key/registry entry.
frontend/src/ts/index.ts	Stops importing legacy leaderboards event handler.
frontend/src/ts/firebase.ts	Updates auth callback to publish userId into signals.
frontend/src/ts/event-handlers/leaderboards.ts	Removes legacy DOM event handler for go-to-page popup.
frontend/src/ts/controllers/page-controller.ts	Points leaderboards route to new Solid skeleton page.
frontend/src/ts/components/ui/table/DataTable.tsx	Adds optional class prop + relaxes generic defaults.
frontend/src/ts/components/pages/leaderboard/UserRank.tsx	New “user rank” panel for logged-in users.
frontend/src/ts/components/pages/leaderboard/Title.tsx	New title/subtitle rendering (daily/weekly date ranges).
frontend/src/ts/components/pages/leaderboard/TableNavigation.tsx	New pagination controls + next reset/update countdown.
frontend/src/ts/components/pages/leaderboard/Table.tsx	New leaderboard table using DataTable column defs.
frontend/src/ts/components/pages/leaderboard/Sidebar.tsx	New selection sidebar (type/mode/language/friends-only).
frontend/src/ts/components/pages/leaderboard/LeaderboardPage.tsx	New Solid leaderboards page orchestrating queries + URL params.
frontend/src/ts/components/mount.tsx	Registers leaderboardpage mount component.
frontend/src/styles/media-queries-yellow.scss	Removes legacy leaderboard responsive overrides.
frontend/src/styles/media-queries-purple.scss	Removes legacy leaderboard responsive overrides.
frontend/src/styles/media-queries-orange.scss	Removes legacy leaderboard responsive overrides.
frontend/src/styles/media-queries-green.scss	Removes legacy leaderboard responsive overrides.
frontend/src/styles/media-queries-gray.scss	Removes legacy leaderboard responsive overrides.
frontend/src/styles/media-queries-brown.scss	Removes legacy leaderboard responsive overrides.
frontend/src/styles/leaderboards.scss	Removes legacy leaderboards stylesheet.
frontend/src/styles/index.scss	Stops importing removed leaderboards.scss.
frontend/src/index.html	Replaces leaderboards HTML load with a Solid mount.
frontend/src/html/pages/leaderboards.html	Removes legacy leaderboards static HTML page.
frontend/tests/components/common/AsyncContent.spec.tsx	Tightens tests to ensure preloader disappears after resolve.