feat(web): port PR #429 low-risk UI polish onto latest next

[0xTomDaniel]

Summary

This PR ports the low-risk, high-confidence UI/UX slices from #429 onto the latest next baseline.

Ported in this PR:

• layout font wiring (Roboto + Roboto Mono)
• global typography/activity-indicator CSS slices
• hire cards compact layout + description clamp + metrics collapse
• hire publish CTA hero asset treatment
• sidebar visual polish (branding/logo, icon set, active indicator, mono label treatment)
• creator identity byline logo swap
• route-level featured description pass-through
• focused test coverage additions for each slice

Supersedes

• Supersedes feat(web): pendle UI/UX polish slices #429

Tracking

• Closes Port PR #429 Pendle UI/UX polish onto latest next #451

Verification

• pnpm -C typescript/clients/web-ag-ui/apps/web test:unit src/app/layout.unit.test.ts src/app/globals.typography.unit.test.ts src/app/globals.activity-indicator.unit.test.ts src/app/hire-agents/preview-route.unit.test.ts src/components/HireAgentsPage.cards.unit.test.ts src/components/AppSidebar.unit.test.ts src/components/ui/CursorListTooltip.unit.test.ts
• pnpm -C typescript/clients/web-ag-ui/apps/web test:int src/app/hire-agents/page.int.test.ts
• pnpm lint
• pnpm build

Follow-up (separate slice)

• AgentDetailPage.tsx + related tests from feat(web): pendle UI/UX polish slices #429 are intentionally left for a dedicated adaptation pass due to major divergence on latest next.