Fix AGP compatibility (8.1.0) and document Day 27 deterministic polygon sync

Author: Anbu-00001

PROJECT_TIMELINE.md

@@ -1113,3 +1113,9 @@ Implemented a route safety evaluation layer integrated with the existing OSRM ro
 Day 26: Polygon-Based Spatial Avoidance
 
 Enhanced routing intelligence by introducing polygon-based danger zone modelling. Incident locations are converted into dynamic polygons, and routes are evaluated using point-in-polygon and polyline intersection logic. A hybrid validation system (distance + polygon) ensures accurate avoidance of complex hazard regions. This upgrade maintains architectural stability, avoids external dependencies, and preserves full offline capability.
+
+---
+
+Day 27: Deterministic Polygon Synchronization
+
+Implemented distributed polygon consistency using deterministic derivation instead of network transmission. Each device generates identical danger zones from incident data using a pure polygon generation function, ensuring zero divergence across the mesh network. Integrated with the existing P2P GossipSub and CRDT pipeline, guaranteeing consistent routing avoidance behavior across all devices without transmitting geometry data.

mobile_app/android/build.gradle.kts

@@ -5,7 +5,7 @@ buildscript {
         mavenCentral()
     }
     dependencies {
-        classpath("com.android.tools.build:gradle:8.1.0")
+        classpath("com.android.tools.build:gradle:8.1.1")
         classpath("org.jetbrains.kotlin:kotlin-gradle-plugin:$kotlin_version")
     }
 }

mobile_app/android/settings.gradle.kts

@@ -19,7 +19,7 @@ pluginManagement {
 
 plugins {
     id("dev.flutter.flutter-plugin-loader") version "1.0.0"
-    id("com.android.application") version "8.1.0" apply false
+    id("com.android.application") version "8.1.1" apply false
     id("org.jetbrains.kotlin.android") version "1.9.22" apply false
 }