v0.2.2 — live proximity refresh + map dot markers + COMMERCIAL row fit

- Map markers: replace osmdroid's default teardrop pin (which reads as
  a 'click me' affordance the map doesn't actually offer) with simple
  red dots for ALPRs, matching the blue user-position dot. Drawables
  share a single dotDrawable() helper.
- Live re-eval on proximity slider change. Bug: moving the DeFlock or
  Citizen distance slider while scanning updated the map's visible
  radius but didn't trigger a re-evaluation of which detections fire,
  so events outside a tightened radius lingered until restart and
  events inside a widened radius wouldn't appear until the next
  fix/poll cycle. Fix: add DetectionStore.clearSource(), add
  refresh() to DeflockScanner + CitizenScanner that clear the source
  and re-emit against cached state, observe the proximity StateFlows
  in DetectionService (drop initial replay so we don't redundantly
  clear+re-emit on first scan start).
- COMMERCIAL row label was clipping under the Switch. Shorten to
  'COMMERCIAL  •  Nest, Ring, Echo' (drop 'devices') and give every
  SourceToggle's Text Modifier.weight(1f) so labels wrap gracefully
  on narrow displays instead of getting truncated.

app/build.gradle.kts

@@ -12,8 +12,8 @@ android {
         applicationId = "org.soulstone.overwatch"
         minSdk = 26
         targetSdk = 35
-        versionCode = 10
-        versionName = "0.2.1"
+        versionCode = 11
+        versionName = "0.2.2"
     }
 
     buildTypes {