feat(04-04): slug resolution + multi-project client dashboard + slug edit

- validate-slug API route: resolves clients.slug for Edge middleware
- proxy.ts: slug-first resolution (D-06) — tries slug then falls back to token
- client-view.ts: complete rewrite — getClientWithProjectsByToken + getProjectView
  - No quote_items, no payment amounts in client API (CLAUDE.md security invariants)
- client/[token]/page.tsx: multi-project dashboard — 1 project = direct view,
  2+ projects = shadcn Tabs with project names (D-09/D-10)
- edit/page.tsx: slug field with link preview + unique constraint error handling
- actions.ts: updateClient now persists slug, redirects on success/slug_taken

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

.planning/phases/04-progetti-multi-project/04-02-SUMMARY.md

@@ -0,0 +1,50 @@
+---
+plan: "04-02"
+phase: "04-progetti-multi-project"
+status: complete
+completed_at: "2026-05-22"
+---
+
+# Summary: 04-02 — Admin Projects List + Client Detail Project Cards
+
+## What Was Built
+
+**NavBar** — added Progetti (`/admin/projects`) and Impostazioni (`/admin/impostazioni`) links in the correct order: Clienti → Progetti → Statistiche → Catalogo → Impostazioni.
+
+**ProjectRow** (`src/components/admin/ProjectRow.tsx`) — new table row component cloned from ClientRow, adapted for projects. Columns: Nome+Cliente, Valore, Acconto badge, Saldo badge, TimerCell, €/h. The €/h is computed inline: `accepted_total / (totalTrackedSeconds / 3600)`, showing `—` when no hours tracked.
+
+**`/admin/projects`** (`src/app/admin/projects/page.tsx`) — table listing all projects via `getAllProjectsWithPayments()`. Empty state shows helpful message.
+
+**`/admin/projects/new`** (`src/app/admin/projects/new/page.tsx`) — creation form with client `<select>`. Accepts `?client_id` query param to pre-select the client (used when clicking "+ Nuovo Progetto" from a client's detail page). On submit calls `createProject` server action and redirects to the new project's workspace.
+
+**project-actions** (`src/app/admin/projects/project-actions.ts`) — server actions: `createProject`, `archiveProject`, `unarchiveProject`, `updateProjectAcceptedTotal`. Each guards with local `requireAdmin()` (same pattern as other actions files — not imported from `@/lib/auth` which doesn't export it).
+
+**`/admin/clients/[id]`** — fully rewritten from tabbed workspace to project cards grid. Active projects shown as clickable cards linking to `/admin/projects/[id]`. Archived projects shown below with reduced opacity. Header retains "Link cliente →" and `ClientActions` component.
+
+**`getAllClientsWithPayments`** — extended to also fetch project names/amounts per client, computing:
+- `projectBrands: string[]` — non-archived project names, used as secondary labels under client name
+- `ltv: string` — sum of all projects' `accepted_total` (including archived), replaces single `accepted_total` in the LTV column
+
+**ClientRow** — shows `projectBrands.join(" | ")` under client name (falls back to `brand_name` if no projects). LTV column now uses `client.ltv`.
+
+**`/admin/page.tsx`** — column header renamed from "Totale" to "LTV".
+
+## Key Implementation Decisions
+
+- **`?client_id` pre-selection in new project form**: used `defaultValue={client_id ?? ""}` on the `<select>` — React controlled default, works with server components.
+- **No `requireAdmin` import**: all server actions files define it locally with the same `getServerSession(authOptions)` pattern — consistent with existing codebase.
+- **`clientProjects` query extended**: instead of a separate parallel query for projectBrands/ltv, the existing `clientProjects` fetch was extended to also select `name`, `accepted_total`, `archived` — avoids an extra DB round-trip.
+
+## Files Modified/Created
+
+| File | Action |
+|------|--------|
+| `src/components/admin/NavBar.tsx` | Updated — added 2 links |
+| `src/components/admin/ProjectRow.tsx` | Created |
+| `src/app/admin/projects/page.tsx` | Created |
+| `src/app/admin/projects/new/page.tsx` | Created |
+| `src/app/admin/projects/project-actions.ts` | Created |
+| `src/app/admin/clients/[id]/page.tsx` | Rewritten |
+| `src/app/admin/page.tsx` | Updated — column header |
+| `src/lib/admin-queries.ts` | Updated — projectBrands + ltv |
+| `src/components/admin/ClientRow.tsx` | Updated — projectBrands + ltv |