FN-5881: guard project status badges against unknown states

Prevent Projects view status rendering from crashing on unknown or missing project states.

- add fallback status config helpers to ProjectCard, ProjectHealthBadge, and ProjectSelector
- format unknown status strings into readable labels and default missing values to Unknown
- add regression tests for unknown and missing statuses across project dashboard components
- document graceful degradation for transient registry or health status mismatches

Files changed:
 docs/multi-project.md                              |  1 +
 packages/dashboard/app/components/ProjectCard.tsx  | 36 ++++++++++++++++-
 .../app/components/ProjectHealthBadge.tsx          | 36 ++++++++++++++++-
 .../dashboard/app/components/ProjectSelector.tsx   | 15 ++++++-
 .../app/components/__tests__/ProjectCard.test.tsx  | 31 +++++++++++++-
 .../__tests__/ProjectHealthBadge.test.tsx          | 47 ++++++++++++++++++++++
 .../components/__tests__/ProjectSelector.test.tsx  | 24 ++++++++++-
 7 files changed, 182 insertions(+), 8 deletions(-)

Fusion-Task-Id: FN-5881

Fusion-Task-Lineage: 55a9df6f-3fcb-46e8-9e83-3494312b4c24

docs/multi-project.md

@@ -106,6 +106,7 @@ Central health tracking keeps mutable project metrics, including:
 - active task counts
 - in-flight agent counts
 - project status (`initializing`, `active`, `paused`, `errored`)
+- dashboard project status badges degrade gracefully if registry or health data briefly carries an unknown or missing status value
 
 ## Global Concurrency Management