Project health chart on LayerChart

Project page gets a Sante chart: daily mean of per-routine health
via computeProjectHealthSeries, ending at the current health score.
Both charts share a HealthChart component built on LayerChart's
AreaChart (time x-axis, fixed 0-100 y-axis, completion dots).

2 files changed, 13 insertions, 2 deletions

diff --git a/src/lib/server/services/routines.test.ts b/src/lib/server/services/routines.test.ts
index e8c4f35..04151c2 100644
--- a/src/lib/server/services/routines.test.ts
+++ b/src/lib/server/services/routines.test.ts
@@ -141,6 +141,9 @@ describe('routines service', () => {
 		expect(dashboard.routines).toHaveLength(1);
 		expect(dashboard.routines[0].status).toBe('veryLate');
 		expect(dashboard.healthScore).toBe(0);
+		const last = dashboard.healthSeries[dashboard.healthSeries.length - 1];
+		expect(last.at).toBe(now);
+		expect(last.health).toBe(dashboard.healthScore);
 	});
 
 	it('overview aggregates per-project health and a global score', async () => {
diff --git a/src/lib/server/services/routines.ts b/src/lib/server/services/routines.ts
index b314d50..ec03c50 100644
--- a/src/lib/server/services/routines.ts
+++ b/src/lib/server/services/routines.ts
@@ -6,7 +6,9 @@ import type { Routine, RoutineCompletion } from './types';
 import {
 	computeRoutineState,
 	computeHealthScore,
+	computeProjectHealthSeries,
 	type RoutineState,
+	type HealthPoint,
 } from '$lib/shared/routine-metrics';
 
 // ponytail: next routine id via MAX(id)+1, safe enough for a single-user app;
@@ -199,6 +201,7 @@ export async function complete(
 export interface ProjectDashboard {
 	routines: RoutineState[];
 	healthScore: number;
+	healthSeries: HealthPoint[];
 }
 
 export async function loadProjectDashboard(
@@ -219,7 +222,8 @@ export async function loadProjectDashboard(
 		if (!existing || r.version > existing.version) current.set(r.id, r);
 	}
 	const routines_ = [...current.values()].filter((r) => !r.archived);
-	if (routines_.length === 0) return { routines: [], healthScore: 100 };
+	if (routines_.length === 0)
+		return { routines: [], healthScore: 100, healthSeries: [] };
 
 	const completions = await db
 		.select()
@@ -232,7 +236,11 @@ export async function loadProjectDashboard(
 		);
 
 	const states = routines_.map((r) => computeRoutineState(r, completions, now));
-	return { routines: states, healthScore: computeHealthScore(states) };
+	return {
+		routines: states,
+		healthScore: computeHealthScore(states),
+		healthSeries: computeProjectHealthSeries(routines_, completions, now),
+	};
 }
 
 export interface ProjectsOverview {