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/components/calendar-year/calendar-year-planning.spec.ts

@@ -1,3 +1,4 @@
+import { createOptimizationPresetRules } from '../../services/rule-service';
 import { provideZonelessChangeDetection } from '@angular/core';
 import { ComponentFixture, TestBed } from '@angular/core/testing';
 import { vi } from 'vitest';
@@ -407,6 +408,8 @@ function jointTrace(): PlanningTrace {
 	};
 }
 
+const presets = createOptimizationPresetRules();
+
 describe('CalendarYear planning outcome boundary', () => {
 	beforeEach(() => localStorage.clear());
 	afterEach(() => {
@@ -1342,7 +1345,7 @@ describe('CalendarYear planning outcome boundary', () => {
 			);
 			if (outcome.kind !== 'Plan') throw new Error(`Expected Plan, got ${outcome.kind}`);
 			localStorage.setItem('leaveBalances', '[]');
-			localStorage.setItem('vacationRules', '[]');
+			localStorage.setItem('vacationRules', '{"version":1,"rules":[]}');
 			await TestBed.configureTestingModule({
 				imports: [CalendarYear],
 				providers: [provideZonelessChangeDetection()],
@@ -1421,7 +1424,7 @@ describe('CalendarYear planning outcome boundary', () => {
 			);
 			if (outcome.kind !== 'Plan') throw new Error(`Expected Plan, got ${outcome.kind}`);
 			localStorage.setItem('leaveBalances', '[]');
-			localStorage.setItem('vacationRules', '[]');
+			localStorage.setItem('vacationRules', '{"version":1,"rules":[]}');
 			await TestBed.configureTestingModule({
 				imports: [CalendarYear],
 				providers: [provideZonelessChangeDetection()],
@@ -1496,7 +1499,7 @@ describe('CalendarYear planning outcome boundary', () => {
 						expiryDate: placementDate,
 					},
 				],
-				rules: [],
+				rules: [presets[0]],
 				declaredDays: [
 					{ date: '2024-08-01', type: 'cp' as const },
 					...(fixedAnchor ? [{ date: '2024-07-31', type: 'other' as const }] : []),
@@ -1524,7 +1527,7 @@ describe('CalendarYear planning outcome boundary', () => {
 				),
 			);
 			localStorage.setItem('leaveBalances', '[]');
-			localStorage.setItem('vacationRules', '[]');
+			localStorage.setItem('vacationRules', '{"version":1,"rules":[]}');
 			await TestBed.configureTestingModule({
 				imports: [CalendarYear],
 				providers: [provideZonelessChangeDetection()],
@@ -1582,7 +1585,7 @@ describe('CalendarYear planning outcome boundary', () => {
 	it('previews a growing and shrinking range across months, then saves it once on release', async () => {
 		localStorage.setItem('app.language', '"fr"');
 		localStorage.setItem('leaveBalances', '[]');
-		localStorage.setItem('vacationRules', '[]');
+		localStorage.setItem('vacationRules', '{"version":1,"rules":[]}');
 		await TestBed.configureTestingModule({
 			imports: [CalendarYear, UserInput],
 			providers: [provideZonelessChangeDetection()],
@@ -1749,7 +1752,7 @@ describe('CalendarYear planning outcome boundary', () => {
 
 	it('edits declarations from configuration and restores the preceding result when switched off', async () => {
 		localStorage.setItem('app.language', '"fr"');
-		localStorage.setItem('vacationRules', '[]');
+		localStorage.setItem('vacationRules', '{"version":1,"rules":[]}');
 		localStorage.setItem('leaveBalances', '[]');
 		localStorage.setItem(
 			'declaredNonWorkingDays',
@@ -1844,7 +1847,7 @@ describe('CalendarYear planning outcome boundary', () => {
 	});
 
 	it('keeps the preceding calendar until a submitted snapshot returns and ignores later edits', async () => {
-		localStorage.setItem('vacationRules', '[]');
+		localStorage.setItem('vacationRules', '{"version":1,"rules":[]}');
 		localStorage.setItem('leaveBalances', '[]');
 		await TestBed.configureTestingModule({
 			imports: [CalendarYear, UserInput],
@@ -1987,7 +1990,7 @@ describe('CalendarYear planning outcome boundary', () => {
 		let now = 1_000;
 		const clock = vi.spyOn(performance, 'now').mockImplementation(() => now);
 		try {
-			localStorage.setItem('vacationRules', '[]');
+			localStorage.setItem('vacationRules', '{"version":1,"rules":[]}');
 			const pending = deferred<PlanningOutcome>();
 			const trace = deferred<PlanningTrace | undefined>();
 			const { calendar, calculation } = calendarFor(
@@ -2100,7 +2103,7 @@ describe('CalendarYear planning outcome boundary', () => {
 		let now = 1_000;
 		const clock = vi.spyOn(performance, 'now').mockImplementation(() => now);
 		try {
-			localStorage.setItem('vacationRules', '[]');
+			localStorage.setItem('vacationRules', '{"version":1,"rules":[]}');
 			const old = deferred<PlanningOutcome>();
 			const latest = deferred<PlanningOutcome>();
 			const { calendar, calculation } = calendarFor(plan);

src/app/components/calendar-year/calendar-year.ts

@@ -1536,6 +1536,24 @@ export class CalendarYear {
 	}
 
 	protected objectiveCopy(id: string) {
+		if (id.startsWith('optimization:')) {
+			const ruleId = id.slice('optimization:'.length);
+			const rule = this.activeCalculation?.snapshot.rules.find(
+				(candidate) => candidate.id === ruleId,
+			);
+			const copy = this.tr().planning.explanation.objectives['optimization'];
+			return {
+				...copy,
+				label: copy.label
+					.replace('{rule}', this.ruleLabel(ruleId))
+					.replace(
+						'{summary}',
+						rule && 'configuration' in rule
+							? this.translationService.optimizationSummary(rule.configuration)
+							: '',
+					),
+			};
+		}
 		const key = id.startsWith('preference:') ? 'preference' : id;
 		const copy = this.tr().planning.explanation.objectives[key];
 		const rule =
@@ -1645,7 +1663,7 @@ export class CalendarYear {
 		if (stage === 'validation') return 5;
 		if (stage === 'obligations') return 20;
 		if (stage === 'at-risk') return 35;
-		if (stage.startsWith('preference:')) return 50;
+		if (stage.startsWith('preference:') || stage.startsWith('optimization:')) return 50;
 		if (stage === 'holiday-week-value') return 58;
 		if (stage === 'non-working-day-gain') return 65;
 		if (stage === 'longest-work-sequence') return 72;