feat(finale): per-project presentation/Q&A durations in m:ss + config-save merge fix

- setProjectTiming stores per-project overrides in round config; phase starts
  resolve: explicit input > project override > round default
- Run Order rows get m:ss inputs per project; PhaseControls one-off overrides
  now also m:ss (shared parseClock: '7:30', '12:05', plain '7')
- CRITICAL: round.update now MERGES validated form config over the existing
  configJson — saving the Config tab was wiping projectOrder (would have
  destroyed a running ceremony) and the finals-docs upload toggle

Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>

tests/unit/live-phase.test.ts

@@ -175,6 +175,58 @@ describe('voting session sync', () => {
   })
 })
 
+describe('per-project timing overrides', () => {
+  it('setProjectTiming stores per-project durations in round config', async () => {
+    await adminCaller.setProjectTiming({
+      roundId: round.id,
+      projectId: p1.id,
+      presentationSeconds: 480,
+      qaSeconds: 90,
+    })
+    const r = await prisma.round.findUniqueOrThrow({ where: { id: round.id } })
+    const overrides = (r.configJson as any).projectTimingOverrides
+    expect(overrides[p1.id]).toEqual({ presentationSeconds: 480, qaSeconds: 90 })
+  })
+
+  it('startPresentation/startQA use the project override over the config default', async () => {
+    await adminCaller.sendToScreens({ roundId: round.id, projectId: p1.id })
+    const pres = await adminCaller.startPresentation({ roundId: round.id })
+    expect(pres.phaseDurationSeconds).toBe(480) // override, not the 120s config default
+    const qa = await adminCaller.startQA({ roundId: round.id })
+    expect(qa.phaseDurationSeconds).toBe(90)
+  })
+
+  it('an explicit durationSeconds input still wins over the project override', async () => {
+    await adminCaller.sendToScreens({ roundId: round.id, projectId: p1.id })
+    const pres = await adminCaller.startPresentation({ roundId: round.id, durationSeconds: 33 })
+    expect(pres.phaseDurationSeconds).toBe(33)
+  })
+
+  it('projects without an override keep the config default', async () => {
+    await adminCaller.sendToScreens({ roundId: round.id, projectId: p2.id })
+    const pres = await adminCaller.startPresentation({ roundId: round.id })
+    expect(pres.phaseDurationSeconds).toBe(120)
+  })
+
+  it('clearing an override falls back to defaults', async () => {
+    await adminCaller.setProjectTiming({
+      roundId: round.id,
+      projectId: p1.id,
+      presentationSeconds: null,
+      qaSeconds: null,
+    })
+    await adminCaller.sendToScreens({ roundId: round.id, projectId: p1.id })
+    const pres = await adminCaller.startPresentation({ roundId: round.id })
+    expect(pres.phaseDurationSeconds).toBe(120)
+  })
+
+  it('getCursor exposes the overrides for the admin UI', async () => {
+    await adminCaller.setProjectTiming({ roundId: round.id, projectId: p2.id, qaSeconds: 240 })
+    const cursor = await adminCaller.getCursor({ roundId: round.id })
+    expect(cursor?.projectTimingOverrides?.[p2.id]?.qaSeconds).toBe(240)
+  })
+})
+
 describe('juror notes', () => {
   it('saveNote upserts one note per (round, project, juror)', async () => {
     await jurorCaller.saveNote({ roundId: round.id, projectId: p1.id, content: 'first draft' })