Fixes to the smoothing/routes UI reported on device:
- Blank detail after save/revert: showSessionDetail was called from inside the
open detail modal, stacking a second overlay; querySelector("#sd-map") then
hit the stale, already-initialized Leaflet map and threw, aborting the rest
of the render (map + speed chart). New reopenDetail() closes the current
detail (and its fullscreen-map child) and reopens fresh, like recalc/refine.
- Native confirm()/prompt() replaced with in-app appConfirm/appPrompt dialogs
(winStack + history integrated, hardware back cancels). Used for smoothed
save, route delete, route rename.
- Slow smoothed save: one UPDATE per point (4000+ IPC round-trips) replaced
with a chunked CASE update — 18 statements for 4366 points, params kept
under SQLite's 999 limit. Verified value-for-value on a copy DB.
- Closing the fullscreen map now also closes the smoothing panel (it is a
fixed element that otherwise lingered over the collapsed map).
- "≈" button active state now reflects panel-open only, not session.smoothed
(it looked permanently pressed after a save).
Docs: README + PROJECT_MAP updated for saved routes, de-jitter, accuracy_m,
routes table and new gps_points/gps_sessions columns. Version 0.1.393.