fix(android): detekt LongMethod on DiscoverScreen (63/60)

PullToRefreshScaffold addition in 4ca10e2 pushed the function 3
lines over. Extracted the inner Column body into a private
DiscoverBody helper composable.

Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>

android/.idea/gradle.xml

@@ -1,5 +1,6 @@
 <?xml version="1.0" encoding="UTF-8"?>
 <project version="4">
+  <component name="GradleMigrationSettings" migrationVersion="1" />
   <component name="GradleSettings">
     <option name="linkedExternalProjectsSettings">
       <GradleProjectSettings>