feat(android): port Seal undraw dynamic-color empty-state illustrations

[Chloemlla]

Summary

• Port Seal undraw-style DynamicColorImageVectors (download / videoFiles / videoSteaming / coder) into com.chloemlla.synapse.mobile.ui.svg
• Map LocalFixedColorRoles accents to Material 3 primaryContainer / onPrimaryContainer / tertiaryContainer (no Monet FixedColorRoles dependency)
• Wire illustrations into login first-run, QR missing-credentials, and session empty states
• Session footer credits unDraw (license + link) and shows VERSION_NAME · SHORT_HASH · BUILD_TIME
• CI/Gradle pass SYNAPSE_BUILD_TIME; theme adds surfaceContainerHighest / inversePrimary for vector fills

Test plan

• GitHub Actions: unit tests + lint + release assemble green
• First-run login shows download illustration empty card
• Session empty state shows videoFiles illustration + undraw credit footer
• QR panel without credentials shows videoSteaming illustration

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Review details

⚙️ Run configuration

Configuration used: Organization UI

Review profile: ASSERTIVE

Plan: Pro Plus

Run ID: ac20de43-9bf3-45cb-a106-b7601ab57c9f

📥 Commits

Reviewing files that changed from the base of the PR and between 2216ca5 and 5f18dba.

📒 Files selected for processing (12)

• .github/workflows/synapse-android.yml
• README.md
• android/README.md
• android/app/build.gradle.kts
• android/app/src/main/java/com/chloemlla/synapse/mobile/ui/SynapseMobileApp.kt
• android/app/src/main/java/com/chloemlla/synapse/mobile/ui/SynapseMobileTheme.kt
• android/app/src/main/java/com/chloemlla/synapse/mobile/ui/svg/VectorPreviews.kt
• android/app/src/main/java/com/chloemlla/synapse/mobile/ui/svg/__DrawableVectors.kt
• android/app/src/main/java/com/chloemlla/synapse/mobile/ui/svg/drawablevectors/Coder.kt
• android/app/src/main/java/com/chloemlla/synapse/mobile/ui/svg/drawablevectors/Download.kt
• android/app/src/main/java/com/chloemlla/synapse/mobile/ui/svg/drawablevectors/VideoFiles.kt
• android/app/src/main/java/com/chloemlla/synapse/mobile/ui/svg/drawablevectors/VideoSteaming.kt

✨ Finishing Touches

🧪 Generate unit tests (beta)

• Create PR with unit tests
• Commit unit tests in branch feat/undraw-dynamic-color-illustrations

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