Fresh Slint-only Plex integration foundation (Tauri untouched; the Tauri
code is slated for deletion at port end, so creds are not shared):
- slice 0: fix the false Plex docs in local_library.rs
- slice 1: add the qbz-plex dependency to qbz-slint
- slice 2a: qbz-app/settings/plex.rs per-user store (10 fields, idempotent
4->11 column migration keeping creds, 8 tests) - frontend-agnostic,
no tauri::State (ADR-006)
- slice 2b: Settings > Local Library Plex section, 1:1 with the complete
Tauri feature - master toggle + collapse, LAN-only address gate, PIN auth
(2500ms poll, self-stopping on section-leave/expiry/disconnect),
manual-token fallback, ping + machine-id capture, multi-section pick
(default-all), disconnect vs clear-cache; once-per-session background
refresh (no cache_clear churn on section re-entry)
cc
vicrodh
f7619a92fc