Extract components and hooks from oversized page files (563/561/520 LOC)
into colocated _components/ and _hooks/ subdirectories. All three
page.tsx files are now thin orchestrators under 300 LOC each
(dsfa: 216, audit-llm: 121, quality: 163). Zero behavior changes.
Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>