feat(04-01): multi-project schema migration — projects, settings, FK pivot

- schema.ts: add projects table, settings kv table, slug on clients;
  migrate 6 FK from client_id to project_id (phases, payments, documents, notes,
  time_entries, quote_items); update all relations and TypeScript types
- admin-queries.ts: fix getAllClientsWithPayments + getClientFullDetail to aggregate
  through projects; add getAllProjectsWithPayments, getProjectFullDetail,
  getClientWithProjects, ClientWithProjects type
- settings.ts: new file — getSetting, updateSetting, getTargetHourlyRate, SETTINGS_KEYS
- Fix all downstream files: actions.ts, quote-actions.ts, new/actions.ts,
  timer-actions.ts, approve/route.ts, comment/route.ts, TimerCell.tsx,
  analytics-queries.ts, client-view.ts, seed.ts
- DB migration applied to Coolify Postgres (all test data cleared, schema rebuilt)

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

src/app/admin/clients/[id]/actions.ts

@@ -10,9 +10,10 @@ import {
   documents,
   payments,
   clients,
+  projects,
   comments,
 } from "@/db/schema";
-import { eq } from "drizzle-orm";
+import { eq, asc, inArray } from "drizzle-orm";
 import { z } from "zod";
 
 // ── CLIENT CRUD ───────────────────────────────────────────────────────────────
@@ -49,18 +50,31 @@ export async function setClientArchived(clientId: string, archived: boolean) {
 
 // ── PHASES ────────────────────────────────────────────────────────────────────
 
+async function getDefaultProjectId(clientId: string): Promise<string | null> {
+  const rows = await db
+    .select({ id: projects.id })
+    .from(projects)
+    .where(eq(projects.client_id, clientId))
+    .orderBy(asc(projects.created_at))
+    .limit(1);
+  return rows[0]?.id ?? null;
+}
+
 export async function addPhase(clientId: string, formData: FormData) {
   const title = (formData.get("title") as string)?.trim();
   if (!title) throw new Error("Titolo fase richiesto");
 
+  const projectId = await getDefaultProjectId(clientId);
+  if (!projectId) throw new Error("Nessun progetto trovato per questo cliente");
+
   const existingPhases = await db
     .select({ sort_order: phases.sort_order })
     .from(phases)
-    .where(eq(phases.client_id, clientId));
+    .where(eq(phases.project_id, projectId));
   const maxOrder = existingPhases.reduce((max, p) => Math.max(max, p.sort_order), -1);
 
   await db.insert(phases).values({
-    client_id: clientId,
+    project_id: projectId,
     title,
     sort_order: maxOrder + 1,
     status: "upcoming",
@@ -146,7 +160,11 @@ export async function addDocument(clientId: string, formData: FormData) {
     url: formData.get("url"),
   });
   if (!parsed.success) throw new Error(parsed.error.issues[0].message);
-  await db.insert(documents).values({ client_id: clientId, ...parsed.data });
+
+  const projectId = await getDefaultProjectId(clientId);
+  if (!projectId) throw new Error("Nessun progetto trovato per questo cliente");
+
+  await db.insert(documents).values({ project_id: projectId, ...parsed.data });
   revalidatePath(`/admin/clients/${clientId}`);
 }
 
@@ -193,20 +211,31 @@ export async function updateAcceptedTotal(clientId: string, formData: FormData)
   const raw = (formData.get("accepted_total") as string)?.trim();
   const val = parseFloat(raw);
   if (isNaN(val) || val < 0) throw new Error("Importo non valido");
+
   // Update accepted_total on client row — denormalized field, quote_items never exposed
   await db
     .update(clients)
     .set({ accepted_total: val.toFixed(2) })
     .where(eq(clients.id, clientId));
-  // Split evenly between two payment rows (Acconto 50% + Saldo 50%)
-  const half = (val / 2).toFixed(2);
-  const paymentsRows = await db
-    .select()
-    .from(payments)
-    .where(eq(payments.client_id, clientId));
-  for (const p of paymentsRows) {
-    await db.update(payments).set({ amount: half }).where(eq(payments.id, p.id));
+
+  // Get all projects for this client, then update their payment stubs
+  const projectRows = await db
+    .select({ id: projects.id })
+    .from(projects)
+    .where(eq(projects.client_id, clientId));
+
+  if (projectRows.length > 0) {
+    const projectIds = projectRows.map((p) => p.id);
+    const half = (val / 2).toFixed(2);
+    const paymentsRows = await db
+      .select()
+      .from(payments)
+      .where(inArray(payments.project_id, projectIds));
+    for (const p of paymentsRows) {
+      await db.update(payments).set({ amount: half }).where(eq(payments.id, p.id));
+    }
   }
+
   revalidatePath(`/admin/clients/${clientId}`);
 }