fix+feat: layer cards, ocean floor, notifications, units, log, photos

Layer picker:
- Fix blank cards: app:layout_columnWeight → android:layout_columnWeight
  (GridLayout children require android: namespace for weight attributes)
- Add Distance unit chips (nm/km/mi) to UNITS section

Map layers:
- Fix ocean floor: use addLayerAbove(lastFillLayer) instead of addLayerAt(0)
  so base rasters appear above OFM water/land fills but below roads+labels
- CardView elevation 16dp→4dp to eliminate visible shadow border

Notifications:
- Add POST_NOTIFICATIONS to manifest
- Request it alongside location permissions on Android 13+ (TIRAMISU+)

Conditions sheet:
- showOverlay() now always hides bottom sheet (STATE_HIDDEN) so it can't
  leak onto non-map pages; bottom padding (80dp) added to Safety+Log panes

Log entries:
- Log entry form visible always (was only shown while recording)
- Photo-only events filtered from track timeline; photos appear only when
  paired with real text in a log entry

Anchor watch:
- Inputs and output radius now use configured depth unit (ft/m)
  with label updates and ft→m conversion before calculation

Photos:
- Tap thumbnail in track event log → fullscreen dialog viewer

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

1 files changed, 19 insertions, 0 deletions

diff --git a/android-app/app/src/main/assets/docs/safety.md b/android-app/app/src/main/assets/docs/safety.md
new file mode 100644
index 0000000..f8bf85d
--- /dev/null
+++ b/android-app/app/src/main/assets/docs/safety.md
@@ -0,0 +1,19 @@
+# Safety First
+
+Nav includes critical safety features that work offline.
+
+## MOB (Man Overboard)
+The **MOB button** is always accessible in the Safety tab.
+1. Tap the large **MOB** button immediately if someone falls overboard.
+2. The app will record the current position and start a timer.
+3. A large arrow will show the bearing and distance back to the MOB point.
+4. An audible alarm will sound continuously.
+5. Tap **RECOVERED** only once the person is safely back on board.
+
+## Anchor Watch
+Monitor your boat's movement while at anchor.
+1. Tap the **Anchor** icon in the Safety tab.
+2. Configure your watch circle radius based on your scope.
+3. Tap **SET ANCHOR** to start monitoring.
+4. If your boat moves outside the circle, a high-priority alarm will sound.
+5. The alarm works in the background even if the screen is off.