Baseline: wave 1A server complete, wave 1B Android scaffold + design system green

assembleDebug, testDebugUnitTest, and recordPaparazziDebug all pass.

Co-Authored-By: Claude Opus 5 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_016bThmkmyUUdqQpy3MXFFe5

.gitignore

@@ -0,0 +1,14 @@
+# build outputs
+app/build/
+app/app/build/
+app/.gradle/
+app/.kotlin/
+app/local.properties
+# server runtime
+server/pb_data/
+server/pocketbase
+server/.dev-credentials
+# worker logs
+logs/*.json
+logs/*.err
+logs/*.state