feat(10-redo-C): CRM leads module — schema, services, UI (Phase 10 redo)

Stage C of staged Phase 10 redo. Restores dangling phase10-wip work:
- schema.ts: leads expansion + activities/reminders tables + relations
- lead-service.ts / lead-validators.ts service layer
- /admin/leads list + detail + actions, LeadTable/LeadDetail/LeadForm
- LogActivityModal, SendQuoteModal, FollowUpWidget on dashboard
- migration 0005 (applied to prod DB in Stage B, along with
  previously-missing 0001/0003/0004 — root cause of all post-deploy
  500s: prod DB had no migrations applied since 0000)

Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>

src/components/admin/dashboard/FollowUpWidget.tsx

@@ -0,0 +1,47 @@
+import { getLeadsNeedingFollowUp } from "@/lib/lead-service";
+import { Card, CardContent, CardHeader, CardTitle } from "@/components/ui/card";
+import { Button } from "@/components/ui/button";
+import { AlertCircle } from "lucide-react";
+import Link from "next/link";
+
+export async function FollowUpWidget() {
+  const leadsNeedingFollowUp = await getLeadsNeedingFollowUp(7);
+
+  return (
+    <Card className="border-orange-200 bg-orange-50">
+      <CardHeader>
+        <CardTitle className="flex items-center gap-2">
+          <AlertCircle className="h-5 w-5 text-orange-600" />
+          Require Follow-up
+        </CardTitle>
+      </CardHeader>
+      <CardContent className="space-y-4">
+        {leadsNeedingFollowUp.length > 0 ? (
+          <>
+            <p className="text-lg font-bold text-orange-900">
+              {leadsNeedingFollowUp.length} lead{leadsNeedingFollowUp.length !== 1 ? "s" : ""}{" "}
+              to contact
+            </p>
+            <ul className="space-y-2 text-sm">
+              {leadsNeedingFollowUp.slice(0, 3).map((lead) => (
+                <li key={lead.id} className="flex justify-between items-center">
+                  <span>{lead.name}</span>
+                  <Button variant="ghost" size="sm" asChild>
+                    <Link href={`/admin/leads/${lead.id}`}>Contact</Link>
+                  </Button>
+                </li>
+              ))}
+            </ul>
+            {leadsNeedingFollowUp.length > 3 && (
+              <Button variant="outline" className="w-full" asChild>
+                <Link href="/admin/leads">View All ({leadsNeedingFollowUp.length})</Link>
+              </Button>
+            )}
+          </>
+        ) : (
+          <p className="text-gray-600 text-sm">All leads are up to date!</p>
+        )}
+      </CardContent>
+    </Card>
+  );
+}