feat(planning): make optimization rules composable

Evaluate explicit, ordered optimization configurations through one shared
planner model. Add six editable presets, durable one-time legacy migration,
and consistent completed and cancelled plan provenance.

Include functional regressions and the agreed trace-removal and benchmark
follow-up specs. Performance acceptance remains in #78 under unchanged gates.

Refs: #70, #71, #72, #73, #74, #75, #76, #77, #78

src/app/services/planning-duration.service.spec.ts

@@ -5,11 +5,12 @@ import { RuleService, RuleType } from './rule-service';
 import { UserInputService } from './user-input-service';
 import { createPlanningCalculation } from './leave-planner.service';
 import { PlanningDurationService } from './planning-duration.service';
+import { OPTIMIZATION_PRESETS } from './planning-objectives';
 
 describe('Planning duration estimate', () => {
 	beforeEach(() => {
 		localStorage.clear();
-		localStorage.setItem('vacationRules', '[]');
+		localStorage.setItem('vacationRules', '{"version":1,"rules":[]}');
 		TestBed.inject(CalendarSettingsService).setPlanningDates('2024-01-01', '2024-12-31');
 		TestBed.inject(UserInputService).updateBalances(() => [
 			{
@@ -34,6 +35,22 @@ describe('Planning duration estimate', () => {
 		expect(TestBed.inject(RuleService).rules).toEqual([]);
 	});
 
+	it('estimates and calibrates optimization rules without a requested leave quantity', () => {
+		const rules = TestBed.inject(RuleService);
+		rules.addRule({
+			id: 'loss',
+			name: 'Loss',
+			type: RuleType.OPTIMIZATION,
+			enabled: true,
+			force: 'preference',
+			configuration: structuredClone(OPTIMIZATION_PRESETS.unplacedAtRisk),
+		});
+		const duration = TestBed.inject(PlanningDurationService);
+		expect(Number.isFinite(duration.estimate()!.maximum)).toBe(true);
+		duration.recordCompletion(duration.request()!, 20_000);
+		expect(duration.estimate()).toEqual({ minimum: 10, maximum: 60, unit: 'seconds' });
+	});
+
 	it('updates for dates, balances and active rules without requesting a calculation', () => {
 		const duration = TestBed.inject(PlanningDurationService);
 		const settings = TestBed.inject(CalendarSettingsService);