feat(portal): replace magic-link with email/password + admin-initiated activation

The client portal no longer uses passwordless / magic-link sign-in. Each
client now has a `portal_users` row with a scrypt-hashed password,
created by an admin from the client detail page; the admin's invite
mails an activation link that the client uses to set their own password.
Forgot-password is wired through the same token mechanism.

Schema (migration `0009_outgoing_rumiko_fujikawa.sql`):

- `portal_users` — one per client account, separate from the CRM
  `users` table (better-auth) so the auth realms stay isolated. Email
  is globally unique, password is null until activation.
- `portal_auth_tokens` — single-use activation / reset tokens. Stores
  only the SHA-256 hash so a DB compromise never leaks live tokens.

Services:

- `src/lib/portal/passwords.ts` — scrypt hash/verify (no new deps;
  uses node:crypto), token mint+hash helpers.
- `src/lib/services/portal-auth.service.ts` — createPortalUser,
  resendActivation, activateAccount, signIn (timing-safe),
  requestPasswordReset, resetPassword. Auth failures throw the new
  UnauthorizedError (401); enumeration-safe behaviour everywhere.

Routes:

- POST /api/portal/auth/sign-in — sets the existing portal JWT cookie.
- POST /api/portal/auth/forgot-password — always 200.
- POST /api/portal/auth/reset-password — token + new password.
- POST /api/portal/auth/activate — token + initial password.
- POST /api/v1/clients/:id/portal-user — admin invite (and `?action=resend`).
- Removed: /api/portal/auth/request, /api/portal/auth/verify (magic link).

UI:

- /portal/login — replaced email-only magic-link form with email +
  password + "forgot password" link.
- /portal/forgot-password, /portal/reset-password, /portal/activate — new.
- New shared `PasswordSetForm` component used by activate + reset.
- New `PortalInviteButton` rendered on the client detail header.

Email send:

- `createTransporter` now wires SMTP auth when SMTP_USER+SMTP_PASS are
  set (gmail app-password or marina-server creds, configured via env).
- `SMTP_FROM` env var lets the sender address be overridden without
  pinning it to `noreply@${SMTP_HOST}`.

Tests:

- Smoke spec 17 (client-portal) updated to the new flow: 7/7 green.
- Smoke specs 02-crud-spine, 05-invoices, 20-critical-path updated to
  match the post-refactor client + invoice forms (drop companyName,
  use OwnerPicker + billingEmail).
- Vitest 652/652 still green; type-check clean.

Drops the dead `requestMagicLink` from portal.service.ts.

Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>

tests/e2e/smoke/05-invoices.spec.ts

@@ -1,5 +1,5 @@
 import { test, expect } from '@playwright/test';
-import { login, navigateTo, PORT_SLUG } from './helpers';
+import { login, navigateTo, apiHeaders, PORT_SLUG } from './helpers';
 
 test.describe('Invoicing', () => {
   test.beforeEach(async ({ page }) => {
@@ -15,18 +15,40 @@ test.describe('Invoicing', () => {
   });
 
   test('create a new invoice with 3 line items', async ({ page }) => {
+    // Seed a client via API to pick in the billing-entity picker.
+    const clientName = `Invoice Test Client ${Date.now()}`;
+    const createRes = await page.request.post('/api/v1/clients', {
+      headers: await apiHeaders(page),
+      data: {
+        fullName: clientName,
+        contacts: [{ channel: 'email', value: 'billing@test.com', isPrimary: true }],
+      },
+    });
+    expect(createRes.ok(), `client create returned ${createRes.status()}`).toBe(true);
+
     await navigateTo(page, '/invoices');
     await page.waitForLoadState('networkidle');
 
-    // Click "New Invoice" (use first() for strict mode)
-    const newBtn = page.getByRole('link', { name: /new invoice/i }).first()
+    const newBtn = page
+      .getByRole('link', { name: /new invoice/i })
+      .first()
       .or(page.getByRole('button', { name: /new invoice/i }).first());
     await newBtn.first().click();
 
-    // Step 1: Client Info
     await page.waitForURL(`**/${PORT_SLUG}/invoices/new**`, { timeout: 10_000 });
 
-    await page.fill('#clientName', 'Invoice Test Client');
+    // Step 1: pick the client in the OwnerPicker. The trigger renders as a
+    // button with role="combobox" and the placeholder "Select owner..." while
+    // empty.
+    const ownerTrigger = page.locator('button[role="combobox"]:has-text("Select owner")').first();
+    await expect(ownerTrigger).toBeVisible({ timeout: 5_000 });
+    await ownerTrigger.click();
+    const searchInput = page.getByPlaceholder(/search clients/i);
+    await expect(searchInput).toBeVisible({ timeout: 5_000 });
+    await searchInput.fill(clientName);
+    await page.waitForTimeout(500); // let the debounced query fire
+    await page.getByRole('option', { name: clientName }).first().click();
+
     await page.fill('#billingEmail', 'billing@test.com');
 
     const dueDate = new Date();
@@ -36,7 +58,6 @@ test.describe('Invoicing', () => {
     await page.getByRole('button', { name: /next/i }).click();
     await page.waitForTimeout(1000);
 
-    // Step 2: Line Items — add 3 items
     for (let i = 0; i < 3; i++) {
       await page.getByRole('button', { name: /add line item/i }).click();
       await page.waitForTimeout(300);
@@ -54,21 +75,16 @@ test.describe('Invoicing', () => {
     await page.locator('input[name="lineItems.2.quantity"]').fill('4');
     await page.locator('input[name="lineItems.2.unitPrice"]').fill('500');
 
-    // Verify subtotal appears (53800 formatted per locale)
     await expect(page.getByText(/53[,.]?800/).first()).toBeVisible({ timeout: 5_000 });
 
-    // Click Next to Review
-    await page.getByRole('button', { name: /next/i }).click();
-    await page.waitForTimeout(1000);
+    await page.getByRole('button', { name: /^next$/i }).click();
+    const createBtn = page.getByRole('button', { name: /create invoice/i });
+    await expect(createBtn).toBeVisible({ timeout: 10_000 });
 
-    // Step 3: Review — verify summary
-    await expect(page.getByText('Invoice Test Client')).toBeVisible();
     await expect(page.getByText(/53[,.]?800/).first()).toBeVisible();
 
-    // Submit
-    await page.getByRole('button', { name: /create invoice/i }).click();
+    await createBtn.click();
 
-    // Should redirect to invoice detail or list
     await page.waitForURL(
       (url) => url.pathname.includes('/invoices') && !url.pathname.includes('/new'),
       { timeout: 15_000 },