feat(auth): add web captcha handling

- replace manual captcha screen with WebView-based VK captcha flow
- handle captcha error 14 by showing the captcha overlay and retrying with success_token
- pass captcha redirect/result state through AppSettings
- remove old captcha ViewModel, navigation, validation, and DI
- add ACRA crash reporting
- add WIP message edit mode UI/state
- update Gradle wrapper, SDK config, and dependencies

app/build.gradle.kts

@@ -79,6 +79,9 @@ android {
 }
 
 dependencies {
+    implementation(libs.acra.email)
+    implementation(libs.acra.dialog)
+
     implementation(projects.feature.auth)
 
     implementation(projects.feature.chatmaterials)