feat: initial TrustOS platform scaffold

- FastAPI backend: auth, findings, dashboard, attack paths, footprint, AI translator, risk calculator, PDF report generator
- Next.js frontend: Vault dashboard, login, findings table, finding detail with AI coach, digital footprint, reports
- PostgreSQL data model: tenants, users, assets, findings, risk scores, audit reports, attack paths
- Docker Compose + Dockerfiles for all services
- Demo seed data: Acme Corp with 6 findings and 90-day risk score history
- AI Risk Translator (OpenAI/Anthropic) with plain-English business impact
- Role-based access: executive / it_admin / trustos_admin
- Scope-lock engine: authorization required before any assessment

Stage 1-8 complete: Phase 1 Vault Audit product ready

frontend/src/components/ScoreTrend.tsx

@@ -0,0 +1,70 @@
+"use client";
+import {
+  LineChart, Line, XAxis, YAxis, CartesianGrid, Tooltip,
+  ResponsiveContainer, ReferenceLine
+} from "recharts";
+
+interface ScoreTrendProps {
+  data: { date: string; score: number }[];
+}
+
+const CustomTooltip = ({ active, payload, label }: any) => {
+  if (active && payload?.length) {
+    return (
+      <div className="bg-vault-dark border border-vault-border rounded-lg px-3 py-2 shadow-xl">
+        <p className="text-vault-muted text-xs mb-1">{label}</p>
+        <p className="text-vault-sapphireLight font-bold text-sm">Score: {payload[0].value}</p>
+      </div>
+    );
+  }
+  return null;
+};
+
+export default function ScoreTrend({ data }: ScoreTrendProps) {
+  // Thin the data to ~30 points for readability
+  const step = Math.ceil(data.length / 30);
+  const thinned = data.filter((_, i) => i % step === 0 || i === data.length - 1);
+
+  // Format dates to short labels
+  const formatted = thinned.map(d => ({
+    ...d,
+    shortDate: d.date.slice(5), // MM-DD
+  }));
+
+  return (
+    <ResponsiveContainer width="100%" height={180}>
+      <LineChart data={formatted} margin={{ top: 5, right: 10, left: -20, bottom: 0 }}>
+        <defs>
+          <linearGradient id="scoreGrad" x1="0" y1="0" x2="0" y2="1">
+            <stop offset="5%" stopColor="#3b82d4" stopOpacity={0.3} />
+            <stop offset="95%" stopColor="#3b82d4" stopOpacity={0} />
+          </linearGradient>
+        </defs>
+        <CartesianGrid strokeDasharray="3 3" stroke="#2d3447" />
+        <XAxis
+          dataKey="shortDate"
+          tick={{ fill: "#64748b", fontSize: 10 }}
+          axisLine={{ stroke: "#2d3447" }}
+          tickLine={false}
+          interval="preserveStartEnd"
+        />
+        <YAxis
+          domain={[0, 100]}
+          tick={{ fill: "#64748b", fontSize: 10 }}
+          axisLine={false}
+          tickLine={false}
+        />
+        <Tooltip content={<CustomTooltip />} />
+        <ReferenceLine y={75} stroke="#3b82d430" strokeDasharray="4 4" />
+        <Line
+          type="monotone"
+          dataKey="score"
+          stroke="#3b82d4"
+          strokeWidth={2}
+          dot={false}
+          activeDot={{ r: 5, fill: "#3b82d4", stroke: "#0a0d14", strokeWidth: 2 }}
+        />
+      </LineChart>
+    </ResponsiveContainer>
+  );
+}