#1360 — On macOS WKWebView, trackpad momentum scrolling fires scroll
events that interleave with the _programmaticScroll setTimeout(0) guard.
A mid-momentum scroll event either gets swallowed (_programmaticScroll
still true) or falsely reports nearBottom (momentum hasn't settled),
keeping _scrollPinned=true and snapping the viewport back down.
Fix: rAF-debounce the scroll listener so the nearBottom check runs at
the next paint frame when the browser's scroll position has settled.
Added a hysteresis counter requiring 2 consecutive near-bottom samples
before re-pinning, preventing accidental re-pin during deceleration.
#1619 — When a custom:* provider (e.g. custom:relay via custom_providers)
has models that overlap with auto-detected models from base_url /v1/models,
the dedup logic at config.py:2263 skipped them all. The named custom
group ended up empty, and the continue at line 2334 silently discarded
the auto-detected models. Result: only the default model appeared.
Fix 1 (config.py): When custom:* named group has 0 models after dedup,
fall back to auto_detected_models_by_provider instead of dropping them.
Fix 2 (routes.py): Extended /api/models/live fallback to handle
custom:* slugs (not just bare "custom") for both custom_providers
config lookup and base_url live fetch.
324aeaaded
