feat: Improve UI layout and navigation

- Increase logo size (48x48 desktop, 56x56 mobile) for better visibility
- Add logo as favicon
- Add logo to mobile header
- Move user menu to navigation bars (sidebar on desktop, bottom bar on mobile)
- Fix desktop chat layout - container structure prevents voice controls cutoff
- Fix mobile bottom bar - use icon-only ActionIcons instead of truncated text buttons
- Hide Create Node/New Conversation buttons on mobile to save header space
- Make fixed header and voice controls work properly with containers

🤖 Generated with [Claude Code](https://claude.com/claude-code)

Co-Authored-By: Claude <noreply@anthropic.com>

.env.test.example

@@ -0,0 +1,21 @@
+# Test Environment Configuration
+# Copy this file to .env.test and fill in your test credentials
+
+# Bluesky Test Account Credentials
+# Create a dedicated test account on bsky.social for testing
+TEST_BLUESKY_USERNAME=your-test-user.bsky.social
+TEST_BLUESKY_PASSWORD=your-test-password
+
+# Application URLs
+TEST_APP_URL=http://localhost:3000
+
+# Test Database (if using separate test DB)
+TEST_SURREALDB_URL=ws://localhost:8000/rpc
+TEST_SURREALDB_NS=test
+TEST_SURREALDB_DB=ponderants_test
+TEST_SURREALDB_USER=root
+TEST_SURREALDB_PASS=root
+
+# API Keys for Testing (optional - can use same as dev)
+# TEST_GOOGLE_GENERATIVE_AI_API_KEY=your-test-api-key
+# TEST_DEEPGRAM_API_KEY=your-test-api-key