feat(l2): long trails with a card copy; map follow and redraw fixes

Trail on the L2: 32768 points every 5 m, no simplification, no point
spacing setting; copied to the card every minute and restored at power-on.
The line keeps up with the position dot (incremental sync, pending point).

Map: a tap's finger jitter no longer turns follow off; the GPS button
shows when the map follows. The trail is drawn as one polyline with
breaks and off-view chunks skipped (an lv_line queued a draw task per
point).

Fewer rebuilds: conversation bubbles patched (new messages, delivery
marks), home mini-map dots reused, Nearby rows rewritten in place,
history read in runs and each file opened once.

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>

solo/wio-tracker-l2/platformio.ini

@@ -69,7 +69,9 @@ build_flags =
   -D OTA_ASSET_SUFFIX='"-Wio-Tracker-L2-ota.bin"'   ; Settings > Firmware update
   ; Sized for the PSRAM (UiCore is heap-allocated, so these land there);
   ; the defaults in the headers are the nRF52 boards'.
-  -D TRAIL_CAPACITY=4096   ; 64 KB (+64 KB of map drawing buffers)
+  -D TRAIL_CAPACITY=32768  ; 512 KB (+512 KB of map drawing buffers): ~160 km at 5 m
+  -D TRAIL_SIMPLIFY=0      ; every point kept: no straight-run simplification
+  -D TRAIL_FIXED_MIN_DELTA_M=5 ; a fixed GPS-jitter gate instead of the point spacing setting
   -D WAYPOINT_CAPACITY=64
   -D HIST_CH_MAX=256       ; all channels together, ~50 KB
   -D HIST_DM_MAX=128       ; all DMs together, ~27 KB