Implement: Motion and Voting

[rubenvdlinde]

OpenSpec Change: p2-motion-and-voting

Spec path: openspec/changes/p2-motion-and-voting

Generated from Specter (17 features).

[rubenvdlinde]

Hydra Builder — PR created

Draft PR: #20
Branch: feature/18/p2-motion-and-voting
Spec: openspec/changes/p2-motion-and-voting/design.md

Implements the full p2-motion-and-voting spec:

• MotionService + MotionController (5 endpoints)
• VotingService + VotingController (6 endpoints)
• OriPublicationService + MailReplyHandler background job
• MotionIndex, MotionDetail, AmendmentDetail views
• VotingRoundPanel + AmendmentList components
• Dutch/English translations, admin settings
• PHPUnit tests (15 test methods across 2 test files)

All PHPCS and ESLint checks pass on new files.