T-6.5 — Lighthouse perf pass

[GEOFARL]

Phase: 6 · Est: 0.5d · Depends on: T-6.4

Scope

• Run Lighthouse CI on: landing, login, dashboard, repositories, repo detail, generate, policies, settings pages.
• Fix low-hanging fruit: image sizes, blocking fonts, bundle splits, disabling SSR for purely client widgets, next/dynamic for charts.
• Target: perf ≥ 80.

Acceptance criteria

• Lighthouse report checked into docs/ or CI artifact with scores.
• Every audited page ≥ 80 perf.

Docs refs

• ../../06-frontend.md
• ../../01-requirements.md NFR-6.3

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Source: docs/tasks/phase-6-polish/T-6.5-lighthouse.md