feat(web): add analytics loading and empty states

[Caneryy]

Summary

• Add skeleton loading states for analytics stat tiles, orbital spend, category breakdown, and feed panels while the initial analytics request is in flight.
• Add empty states for spend-by-category, recent transactions, and execution feed when no usage history exists yet.
• Preserve existing populated analytics rendering after data loads.

Test plan

• npm run typecheck
• npm run build
• Open Control Deck with a fresh API and confirm loading skeletons appear briefly
• Confirm empty-state copy appears before the first paid query
• Run a paid query and confirm populated analytics behavior is unchanged

Closes #24

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[emrekayat]

Thanks for the PR for #24. The loading/empty-state behavior looks aligned with the issue, and local typecheck/build pass, but I cannot merge it yet because the formatting gate fails.

Local verification:

• npm run typecheck passes.
• npm run build --workspace @query402/web passes.
• npm run build passes.
• npm run check:source-artifacts passes.
• npm run format:check fails on apps/web/src/pages/ControlDeckPage.tsx.

Please run Prettier on the touched files, push the formatting fix, and rerun npm run format:check before re-review.

[emrekayat]

Thanks for the UI pass here. I reviewed the branch locally as the maintainer account.

What passes:

• npm run typecheck
• npm run build
• npm run lint exits 0 (warnings only)

Blocker before merge:

• npm run format:check fails on apps/web/src/pages/ControlDeckPage.tsx.

Please run Prettier on that file (or npm run format) and push the formatting-only fix, then rerun:

npm run format:check
npm run typecheck
npm run build

Functional review note: the loading/empty-state approach is in scope for #24 and preserves the populated analytics path. I can re-check quickly once the formatting failure is fixed.

CI note: GitHub Actions is also failing on a Rollup optional dependency install issue (@rollup/rollup-linux-x64-gnu), which appears CI-environment related. I am not blocking on the Vercel authorization check, but the local formatting failure needs to be fixed before merge.

[Caneryy]

Thanks for the review @emrekayat — formatting fix is pushed.

• Ran Prettier on apps/web/src/pages/ControlDeckPage.tsx
• Verified locally:
  • npm run format:check ✅
  • npm run typecheck ✅
  • npm run build ✅

Ready for re-review whenever you have a moment.