Completes the server side of "Closer to Home". /api/feed gains a `home` param
('US' or 'US-NY'); when set the response is private (like prefs) and sectioned:
- Near you (+ Elsewhere in your country when a state is set) is a ONE-TIME lead
block on page 0; the world is the paginated body. next_offset tells the client
where to continue, so the lead block never skews world paging.
- Thin tiers fold down (MIN_TIER=3) so a header is never shown empty (lead, don't trap).
- State match counts only on high/medium geo confidence; the "country" tier excludes
exactly what went to "near", so a low-confidence home-state story still surfaces
(it doesn't vanish between tiers — caught + tested).
- Items carry a `section` tag; paywalled sort is now within-section. No home => exact
prior behavior (section null, default/edge-cached feed unchanged), Brief untouched.
364 tests green. Frontend next: Home picker + sectioned feed rendering.
Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>
thejayman77
e7e8f5515e