New /methodology page with 3 tabs for viewing and editing decision
writing methodology. Uses DB override pattern: hardcoded Python
constants serve as defaults, edits saved to appeal_type_rules table,
delete restores default.
Backend: 3 generic endpoints (GET/PUT/DELETE /api/methodology/{category}/{key})
with validation per category type.
Frontend: methodology.ts hooks, GoldenRatiosPanel (number inputs per
outcome/section), DiscussionRulesPanel (accordion with textarea per
rule), ContentChecklistsPanel (markdown editor with preview toggle).
Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>
