PBI-56 + ST-1275: PLAN_READY → GRILLING re-grill + SKIPPED status rendering (#147)

* fix(ST-1272): allow PLAN_READY → GRILLING re-grill transition

actions/ideas.ts already lists PLAN_READY in GRILL_TRIGGERABLE_FROM,
but lib/idea-status.ts ALLOWED_TRANSITIONS was missing the
PLAN_READY → GRILLING edge. As a result, clicking Grill on a PLAN_READY
idea returned 422 "Status-transitie ongeldig" while the UI button was
enabled. Mirrors the existing PLANNED → GRILLING re-grill behaviour.

- lib/idea-status.ts: PLAN_READY allows GRILLING in addition to
  PLANNING/PLANNED
- __tests__/lib/idea-status.test.ts: explicit assert for
  PLAN_READY → GRILLING and PLAN_READY added to the regrill loop
  covering every GRILL_TRIGGERABLE_FROM status

Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>

* feat(ST-1275): render SKIPPED job status in chart-colors and insights

Closing the gap left when ClaudeJobStatus.SKIPPED was added to the schema:
the badge map and case-mapper already covered it, but the chart palette,
the per-day insights aggregator and the stacked-bar chart did not. SKIPPED
jobs (e.g. cmovkur8 manually flipped during the no-op-exit hotfix) now
render with a muted style consistent with cancelled.

- lib/chart-colors.ts: JOB_STATUS_COLORS gains a 'skipped' entry
  (var(--muted-foreground), same intensity as cancelled — neither rood/orange)
- lib/insights/agent-throughput.ts: DayCount + STATUSES + perDay zero-fill
  now include 'skipped'; the SQL terminal_7d filter already counted SKIPPED
- app/(app)/insights/components/agent-throughput.tsx: STACKED_STATUSES and
  the empty-state guard include 'skipped'
- __tests__: chart-colors keys list, job-status round-trip ('all 7 statuses')
  and the insights non-zero filter all account for SKIPPED

Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>

---------

Co-authored-by: Claude Opus 4.7 (1M context) <noreply@anthropic.com>

__tests__/lib/chart-colors.test.ts

@@ -34,7 +34,7 @@ describe('chart-colors', () => {
 
   it('JOB_STATUS_COLORS has all ClaudeJobStatus keys and non-empty values', () => {
     const keys: (keyof typeof JOB_STATUS_COLORS)[] = [
-      'queued', 'claimed', 'running', 'done', 'failed', 'cancelled',
+      'queued', 'claimed', 'running', 'done', 'failed', 'cancelled', 'skipped',
     ]
     for (const key of keys) {
       expect(JOB_STATUS_COLORS[key]).toBeTruthy()

__tests__/lib/idea-status.test.ts

@@ -41,6 +41,7 @@ describe('canTransition', () => {
   it('allows re-grill from GRILLED and PLAN_READY-ish states', () => {
     expect(canTransition('GRILLED', 'GRILLING')).toBe(true)
     expect(canTransition('PLAN_FAILED', 'PLANNING')).toBe(true)
+    expect(canTransition('PLAN_READY', 'GRILLING')).toBe(true)
   })
 
   it('allows fail-side transitions', () => {
@@ -60,8 +61,8 @@ describe('canTransition', () => {
   })
 
   it('canTransition to GRILLING from all statuses that allow re-grill', () => {
-    // DRAFT, GRILLED, GRILL_FAILED, PLANNED are in GRILL_TRIGGERABLE_FROM and support the transition.
-    const regrill = ['DRAFT', 'GRILLED', 'GRILL_FAILED', 'PLANNED'] as const
+    // GRILL_TRIGGERABLE_FROM in actions/ideas.ts — alle statussen die re-grill ondersteunen.
+    const regrill = ['DRAFT', 'GRILLED', 'GRILL_FAILED', 'PLAN_READY', 'PLANNED'] as const
     for (const status of regrill) {
       expect(canTransition(status, 'GRILLING')).toBe(true)
     }

__tests__/lib/insights/agent-throughput.test.ts

@@ -48,7 +48,7 @@ describe('getJobsPerDay', () => {
 
     // All days should have zero counts except the three we seeded
     const nonZero = result.perDay.filter(
-      d => d.done + d.failed + d.queued + d.claimed + d.running + d.cancelled > 0,
+      d => d.done + d.failed + d.queued + d.claimed + d.running + d.cancelled + d.skipped > 0,
     )
     expect(nonZero).toHaveLength(3)
 

__tests__/lib/job-status.test.ts

@@ -27,13 +27,14 @@ describe('job-status mappers', () => {
     expect(jobStatusFromApi('QUEUED')).toBe('QUEUED')
   })
 
-  it('maps all 6 DB statuses to API', () => {
+  it('maps all 7 DB statuses to API', () => {
     expect(jobStatusToApi('QUEUED')).toBe('queued')
     expect(jobStatusToApi('CLAIMED')).toBe('claimed')
     expect(jobStatusToApi('RUNNING')).toBe('running')
     expect(jobStatusToApi('DONE')).toBe('done')
     expect(jobStatusToApi('FAILED')).toBe('failed')
     expect(jobStatusToApi('CANCELLED')).toBe('cancelled')
+    expect(jobStatusToApi('SKIPPED')).toBe('skipped')
   })
 
   it('ACTIVE_JOB_STATUSES contains exactly QUEUED, CLAIMED, RUNNING', () => {