refactor(wear): drop local.properties fallback for doctate.* keys

Profile file (via -Pdoctate.* injected by run.sh) is now the only source.
local.properties stays gitignored but is no longer consulted by the build.

refs #3

clients/wearos/app/build.gradle.kts

@@ -1,5 +1,3 @@
-import java.util.Properties
-
 plugins {
     alias(libs.plugins.android.application)
     alias(libs.plugins.kotlin.compose)
@@ -23,19 +21,13 @@ android {
         testInstrumentationRunner = "androidx.test.runner.AndroidJUnitRunner"
 
         // Build-time config resolved in this order:
-        //   1. Gradle CLI property (-Pdoctate.serverUrl=...) — used by run.sh
-        //      to switch between emulator and watch builds without touching
-        //      local.properties.
-        //   2. local.properties (gitignored) — sticky per-developer default.
-        //   3. Hardcoded fallback — emulator loopback + sentinel key.
-        val localProps = Properties().apply {
-            rootProject.file("local.properties").takeIf { it.exists() }
-                ?.inputStream()?.use { load(it) }
-        }
+        //   1. Gradle CLI property (-Pdoctate.serverUrl=...) — set by run.sh
+        //      from the active profile (profiles.d/<name>.sh).
+        //   2. Hardcoded fallback — emulator loopback + sentinel key. This
+        //      path is only taken for the `emulator` target, which has no
+        //      profile concept.
         fun resolveProp(key: String, default: String): String =
-            (project.findProperty(key) as? String)
-                ?: localProps.getProperty(key)
-                ?: default
+            (project.findProperty(key) as? String) ?: default
         buildConfigField(
             "String", "SERVER_URL",
             "\"${resolveProp("doctate.serverUrl", "http://10.0.2.2:3000")}\""