pc: PC setup tracker at /trackers/pc on the hardware schema

- model the existing hardware schema in Drizzle (devices, components, new sensitivities)
- idempotent reconciling migration: new columns, checks, setup_overview view, grants, meta.tables
- seed: main PC labels/hostnames, planned AMD X3D + RTX 5090 build, stan-ovh (OVH RISE-S),
  other devices, sensitivity placeholders (no invented cm/360)
- owner-only add/edit via modals; public view hides notes/order numbers
- trackers dropdown entry + icon, seo/title/sitemap, owner write prefix

src/lib/tracker-icons.ts

@@ -51,6 +51,12 @@ export const trackerIcons: Record<string, TrackerIcon> = {
 		ink: WHITE,
 		paths: ['M9 18V5l12-2v13', c(6, 18, 3), c(18, 16, 3)]
 	},
+	pc: {
+		from: '#22d3ee',
+		to: '#0891b2',
+		ink: WHITE,
+		paths: ['M4 4h16v11H4z', 'M9 19h6M12 15v4', 'M8 8h3v3H8z', 'M14 8.5h2M14 11h2']
+	},
 	health: {
 		from: '#f472b6',
 		to: '#db2777',