v0.3.0

What's Changed

• fix(app): show persist banner based on disk presence, not checkbox state
• docs(claude-md): update architecture for Chroma-only vector store
• i18n: add persist banner and dialog keys, remove sidebar.vector_store
• chore: drop qdrant/faiss deps, bump version to 0.3.0
• refactor(rag): consolidate to Chroma-only vector store
• fix(rag): wire VectorStoreFactory.load() into the persist-index flow
• ci: add workflow_dispatch trigger to release workflow
• ci: merge docker-publish into release workflow

Full Changelog: v0.2.1...v0.3.0