- Introduce DevServerStore and DevServerProcessManager with a simplified store API contract
- Add dev-server script detection and route legacy manager behavior through the new process manager
- Add a dedicated dev-server router with start/stop/status/log endpoints and SSE event streaming
- Wire dev-server routes into the main route table and hook manager shutdown into server teardown
- Expand tests and architecture docs for store, process, route, detection, and SSE coverage
- Remove legacy .fusion/memory.md fallback references and normalize prompts/docs to .fusion/memory/MEMORY.md
- Stop legacy mirror writes and fallback reads in core memory backend and project memory flows
- Update engine worktree boundary checks and tests for canonical memory file handling
- Align dashboard memory/settings surfaces and route tests with canonical memory behavior
- Add model-favorites persistence test coverage for mission interview and new agent dialogs
- Bump SQLite schema to v19 with ai_sessions lock columns and lock index, and align migration coverage in core DB tests
- Extend AiSessionStore with acquire/release/force lock APIs, stale lock cleanup, and lock metadata in ai_session update summaries
- Enforce lock checks on planning, subtask, and mission interview mutation routes with 409 conflict responses while keeping stream reads unaffected
- Add frontend tab identity + useSessionLock hook and wire Planning, Subtask, and Mission modals to pass tabId, show lock overlay, and support Take Control
- Expand dashboard route/e2e and modal tests to validate lock enforcement, lock handoff, and lock-aware session reentry behavior
- Persist per-turn thinking output for planning and mission interview sessions, including history serialization and recovery-safe state fields
- Add shared conversation history parsing/API types and a reusable timeline component with formatted answers and expandable AI reasoning
- Restore and render conversation history across Planning Mode, Mission Interview, and Subtask Breakdown modals during resume and live question flow
- Harden response submission with nullable-question guards and expand unit/e2e coverage for history rendering and persistence behavior
- Add tests for useAgents and useProjectHealth hooks, including loading, success, and error flows
- Add useFileBrowser and useFileEditor hook tests for file navigation, save behavior, and edge cases
- Add component tests for AgentImportModal and AgentGenerationModal interaction paths
- Add MissionInterviewModal tests covering question flow, submission, and state transitions
- Stabilize dashboard test suite cleanup and mocking patterns to reduce flakiness
