feat(auth): phase 3 — replace Supabase GoTrue with bcryptjs+jose

Custom auth stack: bcryptjs password hashing (cost 10, GoTrue-compatible),
jose JWT session cookies (edge-safe, 8hr TTL), new API routes for
login/logout/reset/change-password, middleware rewritten to JWT-only
verification with no DB access. All 38 protected pages and API routes
migrated from supabase.auth.getUser() to getSession(). Supabase .from()
queries retained for Phase 4. lib/db/index.ts refactored to lazy Proxy
singleton to avoid module-level throw during Next.js build.

tsc: clean, build: clean, tests: 4/4 passed

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

app/api/auth/reset-request/route.ts

@@ -0,0 +1,37 @@
+export const dynamic = 'force-dynamic'
+
+import { NextRequest, NextResponse } from 'next/server'
+import { asAdmin } from '@/lib/db/with-user'
+import { users, passwordResetTokens } from '@/lib/db/schema'
+import { eq } from 'drizzle-orm'
+import { createHash, randomBytes } from 'crypto'
+import { sendPasswordResetEmail } from '@/lib/notifications/mailer'
+
+export async function POST(req: NextRequest) {
+  const { email } = await req.json()
+  if (!email) return NextResponse.json({ ok: true })  // don't reveal user existence
+
+  const [user] = await asAdmin(db =>
+    db.select({ id: users.id, name: users.name }).from(users)
+      .where(eq(users.email, email.toLowerCase())).limit(1)
+  )
+
+  if (!user) return NextResponse.json({ ok: true })  // silent
+
+  const rawToken = randomBytes(32).toString('hex')
+  const tokenHash = createHash('sha256').update(rawToken).digest('hex')
+  const expiresAt = new Date(Date.now() + 60 * 60 * 1000)  // 1 hour
+
+  await asAdmin(db => db.insert(passwordResetTokens).values({
+    userId: user.id,
+    tokenHash,
+    expiresAt,
+  }))
+
+  const appUrl = process.env.APP_URL ?? ''
+  const resetLink = `${appUrl}/reset-password?token=${rawToken}`
+
+  await sendPasswordResetEmail({ to: email, name: user.name, resetLink })
+
+  return NextResponse.json({ ok: true })
+}