Merges FN-3428's branch-field contract and merge target override/default behavior tests across core, dashboard, and engine, plus a companion fix that sweeps subsumed autostash orphans and surfaces outcomes on the task feed. Adds project-node path mapping persistence APIs and schema (FN-3503), new ag
Fusion-Task-Id: FN-3428
Implements distributed mesh task creation by adding replicated create primitives to the core store, wiring new API routes (`register-mesh-routes.ts`) that replicate task creation across clustered nodes while preserving remote-targeting metadata, and updating the dashboard's task creation flow accord
Fusion-Task-Id: FN-3450
- Document how branch field data flows through task lifecycle
- Clarify architecture-level plumbing responsibilities for branch metadata
- Capture Step 4 documentation updates in docs/architecture.md
Fusion-Task-Id: FN-3421
Split packages/dashboard/app/__tests__/api.test.ts (~6.4k lines) into per-area files (auth, git, missions, projects, settings, tasks), and src/__tests__/routes.test.ts (~20k lines) into per-area files (agents, auth, automation, git, github, planning, settings, system, tasks, tasks-ops). The monolith files were dominating wall-clock for the dashboard suite under file-parallel execution.
Also document in packages/core/vitest.config.ts why the core suite cannot move to "threads": vitest-setup gates per-worker cwd on isMainThread (false in worker_threads, so isolation breaks), and setup-test-isolation writes process.env.HOME unconditionally (threads share env, so concurrent workers race).
Drop an unused execFileSync import from scripts/test-with-lock.mjs.
Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>
