## Summary
Maintainer re-land of
[#2334](https://github.com/Runfusion/Fusion/pull/2334) (fork
`flexi767:feat/per-mission-task-prefix`) after resolving merge conflicts
with current `main`.
Fork push was unavailable despite `maintainerCanModify`, so this branch
carries the conflict resolution.
### Feature
- Optional per-mission `taskPrefix` for triaged task ids (inherits
project prefix when unset)
- Dashboard MissionManager + routes + store/triage plumbing
- Postgres migration for `project.missions.task_prefix`
### Conflict resolution
- Main claimed migration **0026** (bigint counters) and **0027**
(workflow IR pin)
- Mission task-prefix migration renumbered **0026 → 0028**
- Baseline `0000_initial.sql` includes `task_prefix` on missions
- `legacy.ts` keeps code-org re-exports; `missions.ts` carries
`taskPrefix` on create/update types
## Test plan
- [ ] CI green (lint/typecheck/build/gate)
- [ ] Create mission with custom prefix; triage feature → task ids use
that prefix
- [ ] Clear mission prefix via PATCH null; new tasks inherit project
prefix
Closes / supersedes #2334 once this lands (or re-point the fork PR).
<!-- This is an auto-generated comment: release notes by coderabbit.ai
-->
## Summary by CodeRabbit
* **New Features**
* Missions can now set an optional per-mission task ID prefix
(overriding the project default).
* Added task prefix support to mission create/edit UI and dashboard
APIs, including normalized uppercase values and validation.
* **Bug Fixes**
* Improved commit hook generation for custom prefixes and special
characters, with safer shell handling to prevent unsafe interpretation.
* **Chores**
* Added PostgreSQL migration and schema-applier support to persist and
propagate mission task prefixes, including upgrade/backfill coverage.
* **Tests**
* Added backend and UI/API test coverage for task-prefix creation,
clearing, and ID minting behavior.
<!-- end of auto-generated comment: release notes by coderabbit.ai -->
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