diff --git a/apps/web/package.json b/apps/web/package.json
index 0ee4a5a..024c4ce 100644
--- a/apps/web/package.json
+++ b/apps/web/package.json
@@ -33,6 +33,7 @@
     "react": "^19.0.0",
     "react-dom": "^19.0.0",
     "react-grid-layout": "^2.2.2",
+    "recharts": "^3.7.0",
     "socket.io-client": "^4.8.3"
   },
   "devDependencies": {
diff --git a/apps/web/src/app/(authenticated)/usage/page.test.tsx b/apps/web/src/app/(authenticated)/usage/page.test.tsx
new file mode 100644
index 0000000..4d97ff6
--- /dev/null
+++ b/apps/web/src/app/(authenticated)/usage/page.test.tsx
@@ -0,0 +1,288 @@
+import { describe, it, expect, vi, beforeEach } from "vitest";
+import { render, screen, waitFor, fireEvent } from "@testing-library/react";
+import type { ReactNode } from "react";
+import UsagePage from "./page";
+
+// ─── Component Prop Types ────────────────────────────────────────────
+
+interface ChildrenProps {
+  children: ReactNode;
+}
+
+interface StyledChildrenProps extends ChildrenProps {
+  className?: string;
+}
+
+// ─── Mocks ───────────────────────────────────────────────────────────
+
+// Mock @/components/ui/card — @mosaic/ui can't be resolved in vitest
+vi.mock("@/components/ui/card", () => ({
+  Card: ({ children, className }: StyledChildrenProps): React.JSX.Element => (
+    <div className={className}>{children}</div>
+  ),
+  CardHeader: ({ children }: ChildrenProps): React.JSX.Element => <div>{children}</div>,
+  CardContent: ({ children, className }: StyledChildrenProps): React.JSX.Element => (
+    <div className={className}>{children}</div>
+  ),
+  CardFooter: ({ children }: ChildrenProps): React.JSX.Element => <div>{children}</div>,
+  CardTitle: ({ children, className }: StyledChildrenProps): React.JSX.Element => (
+    <h3 className={className}>{children}</h3>
+  ),
+  CardDescription: ({ children, className }: StyledChildrenProps): React.JSX.Element => (
+    <p className={className}>{children}</p>
+  ),
+}));
+
+// Mock recharts — jsdom has no SVG layout engine, so we render stubs
+vi.mock("recharts", () => ({
+  LineChart: ({ children }: ChildrenProps): React.JSX.Element => (
+    <div data-testid="recharts-line-chart">{children}</div>
+  ),
+  Line: (): React.JSX.Element => <div />,
+  BarChart: ({ children }: ChildrenProps): React.JSX.Element => (
+    <div data-testid="recharts-bar-chart">{children}</div>
+  ),
+  Bar: (): React.JSX.Element => <div />,
+  PieChart: ({ children }: ChildrenProps): React.JSX.Element => (
+    <div data-testid="recharts-pie-chart">{children}</div>
+  ),
+  Pie: (): React.JSX.Element => <div />,
+  Cell: (): React.JSX.Element => <div />,
+  XAxis: (): React.JSX.Element => <div />,
+  YAxis: (): React.JSX.Element => <div />,
+  CartesianGrid: (): React.JSX.Element => <div />,
+  Tooltip: (): React.JSX.Element => <div />,
+  ResponsiveContainer: ({ children }: ChildrenProps): React.JSX.Element => <div>{children}</div>,
+  Legend: (): React.JSX.Element => <div />,
+}));
+
+// Mock the telemetry API module
+vi.mock("@/lib/api/telemetry", () => ({
+  fetchUsageSummary: vi.fn(),
+  fetchTokenUsage: vi.fn(),
+  fetchCostBreakdown: vi.fn(),
+  fetchTaskOutcomes: vi.fn(),
+}));
+
+// Import mocked modules after vi.mock
+import {
+  fetchUsageSummary,
+  fetchTokenUsage,
+  fetchCostBreakdown,
+  fetchTaskOutcomes,
+} from "@/lib/api/telemetry";
+
+// ─── Test Data ───────────────────────────────────────────────────────
+
+const mockSummary = {
+  totalTokens: 245800,
+  totalCost: 3.42,
+  taskCount: 47,
+  avgQualityGatePassRate: 0.87,
+};
+
+const mockTokenUsage = [
+  { date: "2026-02-08", inputTokens: 10000, outputTokens: 5000, totalTokens: 15000 },
+  { date: "2026-02-09", inputTokens: 12000, outputTokens: 6000, totalTokens: 18000 },
+];
+
+const mockCostBreakdown = [
+  { model: "claude-sonnet-4-5", provider: "anthropic", cost: 18.5, taskCount: 124 },
+  { model: "gpt-4o", provider: "openai", cost: 12.3, taskCount: 89 },
+];
+
+const mockTaskOutcomes = [
+  { outcome: "Success", count: 312, color: "#6EBF8B" },
+  { outcome: "Partial", count: 48, color: "#F5C862" },
+];
+
+function setupMocks(overrides?: { empty?: boolean; error?: boolean }): void {
+  if (overrides?.error) {
+    vi.mocked(fetchUsageSummary).mockRejectedValue(new Error("Network error"));
+    vi.mocked(fetchTokenUsage).mockRejectedValue(new Error("Network error"));
+    vi.mocked(fetchCostBreakdown).mockRejectedValue(new Error("Network error"));
+    vi.mocked(fetchTaskOutcomes).mockRejectedValue(new Error("Network error"));
+    return;
+  }
+
+  const summary = overrides?.empty ? { ...mockSummary, taskCount: 0 } : mockSummary;
+
+  vi.mocked(fetchUsageSummary).mockResolvedValue(summary);
+  vi.mocked(fetchTokenUsage).mockResolvedValue(mockTokenUsage);
+  vi.mocked(fetchCostBreakdown).mockResolvedValue(mockCostBreakdown);
+  vi.mocked(fetchTaskOutcomes).mockResolvedValue(mockTaskOutcomes);
+}
+
+// ─── Tests ───────────────────────────────────────────────────────────
+
+describe("UsagePage", (): void => {
+  beforeEach((): void => {
+    vi.clearAllMocks();
+  });
+
+  it("should render the page title and subtitle", (): void => {
+    setupMocks();
+    render(<UsagePage />);
+
+    expect(screen.getByRole("heading", { level: 1 })).toHaveTextContent("Usage");
+    expect(screen.getByText("Token usage and cost overview")).toBeInTheDocument();
+  });
+
+  it("should have proper layout structure", (): void => {
+    setupMocks();
+    const { container } = render(<UsagePage />);
+    const main = container.querySelector("main");
+    expect(main).toBeInTheDocument();
+  });
+
+  it("should show loading skeleton initially", (): void => {
+    setupMocks();
+    render(<UsagePage />);
+    expect(screen.getByTestId("loading-skeleton")).toBeInTheDocument();
+  });
+
+  it("should render summary cards after loading", async (): Promise<void> => {
+    setupMocks();
+    render(<UsagePage />);
+
+    await waitFor((): void => {
+      expect(screen.getByTestId("summary-cards")).toBeInTheDocument();
+    });
+
+    // Check summary card values
+    expect(screen.getByText("Total Tokens")).toBeInTheDocument();
+    expect(screen.getByText("245.8K")).toBeInTheDocument();
+    expect(screen.getByText("Estimated Cost")).toBeInTheDocument();
+    expect(screen.getByText("$3.42")).toBeInTheDocument();
+    expect(screen.getByText("Task Count")).toBeInTheDocument();
+    expect(screen.getByText("47")).toBeInTheDocument();
+    expect(screen.getByText("Quality Gate Pass Rate")).toBeInTheDocument();
+    expect(screen.getByText("87.0%")).toBeInTheDocument();
+  });
+
+  it("should render all chart sections after loading", async (): Promise<void> => {
+    setupMocks();
+    render(<UsagePage />);
+
+    await waitFor((): void => {
+      expect(screen.getByTestId("token-usage-chart")).toBeInTheDocument();
+      expect(screen.getByTestId("cost-breakdown-chart")).toBeInTheDocument();
+      expect(screen.getByTestId("task-outcomes-chart")).toBeInTheDocument();
+    });
+  });
+
+  it("should render the time range selector with three options", (): void => {
+    setupMocks();
+    render(<UsagePage />);
+
+    expect(screen.getByText("7 Days")).toBeInTheDocument();
+    expect(screen.getByText("30 Days")).toBeInTheDocument();
+    expect(screen.getByText("90 Days")).toBeInTheDocument();
+  });
+
+  it("should have 30 Days selected by default", (): void => {
+    setupMocks();
+    render(<UsagePage />);
+
+    const button30d = screen.getByText("30 Days");
+    expect(button30d).toHaveAttribute("aria-pressed", "true");
+  });
+
+  it("should change time range when a different option is clicked", async (): Promise<void> => {
+    setupMocks();
+    render(<UsagePage />);
+
+    // Wait for initial load
+    await waitFor((): void => {
+      expect(screen.getByTestId("summary-cards")).toBeInTheDocument();
+    });
+
+    // Click 7 Days
+    const button7d = screen.getByText("7 Days");
+    fireEvent.click(button7d);
+
+    expect(button7d).toHaveAttribute("aria-pressed", "true");
+    expect(screen.getByText("30 Days")).toHaveAttribute("aria-pressed", "false");
+  });
+
+  it("should refetch data when time range changes", async (): Promise<void> => {
+    setupMocks();
+    render(<UsagePage />);
+
+    // Wait for initial load (30d default)
+    await waitFor((): void => {
+      expect(screen.getByTestId("summary-cards")).toBeInTheDocument();
+    });
+
+    // Initial call was with "30d"
+    expect(fetchUsageSummary).toHaveBeenCalledWith("30d");
+
+    // Change to 7d
+    fireEvent.click(screen.getByText("7 Days"));
+
+    await waitFor((): void => {
+      expect(fetchUsageSummary).toHaveBeenCalledWith("7d");
+    });
+  });
+
+  it("should show empty state when no tasks exist", async (): Promise<void> => {
+    setupMocks({ empty: true });
+    render(<UsagePage />);
+
+    await waitFor((): void => {
+      expect(screen.getByTestId("empty-state")).toBeInTheDocument();
+    });
+
+    expect(screen.getByText("No usage data yet")).toBeInTheDocument();
+  });
+
+  it("should show error state on fetch failure", async (): Promise<void> => {
+    setupMocks({ error: true });
+    render(<UsagePage />);
+
+    await waitFor((): void => {
+      expect(screen.getByText("Network error")).toBeInTheDocument();
+    });
+
+    expect(screen.getByText("Try again")).toBeInTheDocument();
+  });
+
+  it("should retry loading when Try again button is clicked after error", async (): Promise<void> => {
+    setupMocks({ error: true });
+    render(<UsagePage />);
+
+    await waitFor((): void => {
+      expect(screen.getByText("Try again")).toBeInTheDocument();
+    });
+
+    // Now set up success mocks and click retry
+    setupMocks();
+    fireEvent.click(screen.getByText("Try again"));
+
+    await waitFor((): void => {
+      expect(screen.getByTestId("summary-cards")).toBeInTheDocument();
+    });
+  });
+
+  it("should display chart section titles", async (): Promise<void> => {
+    setupMocks();
+    render(<UsagePage />);
+
+    await waitFor((): void => {
+      expect(screen.getByText("Token Usage Over Time")).toBeInTheDocument();
+      expect(screen.getByText("Cost by Model")).toBeInTheDocument();
+      expect(screen.getByText("Task Outcomes")).toBeInTheDocument();
+    });
+  });
+
+  it("should render recharts components within chart containers", async (): Promise<void> => {
+    setupMocks();
+    render(<UsagePage />);
+
+    await waitFor((): void => {
+      expect(screen.getByTestId("recharts-line-chart")).toBeInTheDocument();
+      expect(screen.getByTestId("recharts-bar-chart")).toBeInTheDocument();
+      expect(screen.getByTestId("recharts-pie-chart")).toBeInTheDocument();
+    });
+  });
+});
diff --git a/apps/web/src/app/(authenticated)/usage/page.tsx b/apps/web/src/app/(authenticated)/usage/page.tsx
new file mode 100644
index 0000000..d90917b
--- /dev/null
+++ b/apps/web/src/app/(authenticated)/usage/page.tsx
@@ -0,0 +1,427 @@
+"use client";
+
+import { useState, useEffect, useCallback } from "react";
+import type { ReactElement } from "react";
+import {
+  LineChart,
+  Line,
+  BarChart,
+  Bar,
+  PieChart,
+  Pie,
+  XAxis,
+  YAxis,
+  CartesianGrid,
+  Tooltip,
+  ResponsiveContainer,
+  Legend,
+} from "recharts";
+import { Card, CardHeader, CardContent, CardTitle, CardDescription } from "@/components/ui/card";
+import {
+  fetchUsageSummary,
+  fetchTokenUsage,
+  fetchCostBreakdown,
+  fetchTaskOutcomes,
+} from "@/lib/api/telemetry";
+import type {
+  TimeRange,
+  UsageSummary,
+  TokenUsagePoint,
+  CostBreakdownItem,
+  TaskOutcomeItem,
+} from "@/lib/api/telemetry";
+
+// ─── Constants ───────────────────────────────────────────────────────
+
+const TIME_RANGES: { value: TimeRange; label: string }[] = [
+  { value: "7d", label: "7 Days" },
+  { value: "30d", label: "30 Days" },
+  { value: "90d", label: "90 Days" },
+];
+
+// Calm, PDA-friendly chart colors (no aggressive reds)
+const CHART_COLORS = {
+  inputTokens: "#6366F1", // Indigo
+  outputTokens: "#38BDF8", // Sky blue
+  grid: "#E2E8F0", // Slate 200
+  barFill: "#818CF8", // Indigo 400
+};
+
+// ─── Helpers ─────────────────────────────────────────────────────────
+
+function formatNumber(value: number): string {
+  if (value >= 1_000_000) {
+    return `${(value / 1_000_000).toFixed(1)}M`;
+  }
+  if (value >= 1_000) {
+    return `${(value / 1_000).toFixed(1)}K`;
+  }
+  return value.toFixed(0);
+}
+
+function formatCurrency(value: number): string {
+  return `$${value.toFixed(2)}`;
+}
+
+function formatPercent(value: number): string {
+  return `${(value * 100).toFixed(1)}%`;
+}
+
+function formatDateLabel(dateStr: string): string {
+  const date = new Date(dateStr + "T00:00:00");
+  return date.toLocaleDateString("en-US", { month: "short", day: "numeric" });
+}
+
+/**
+ * Map TaskOutcomeItem[] to recharts-compatible data with `fill` property.
+ * This replaces deprecated Cell component (removed in Recharts 4.0).
+ */
+function toFillData(
+  outcomes: TaskOutcomeItem[]
+): { outcome: string; count: number; fill: string }[] {
+  return outcomes.map((item) => ({
+    outcome: item.outcome,
+    count: item.count,
+    fill: item.color,
+  }));
+}
+
+// ─── Sub-components ──────────────────────────────────────────────────
+
+function SummaryCard({
+  title,
+  value,
+  subtitle,
+}: {
+  title: string;
+  value: string;
+  subtitle?: string;
+}): ReactElement {
+  return (
+    <Card>
+      <CardContent className="pt-6">
+        <p className="text-sm font-medium text-gray-500">{title}</p>
+        <p className="text-2xl font-bold text-gray-900 mt-1">{value}</p>
+        {subtitle ? <p className="text-xs text-gray-400 mt-1">{subtitle}</p> : null}
+      </CardContent>
+    </Card>
+  );
+}
+
+function LoadingSkeleton(): ReactElement {
+  return (
+    <div className="space-y-6" data-testid="loading-skeleton">
+      {/* Summary cards skeleton */}
+      <div className="grid grid-cols-1 sm:grid-cols-2 lg:grid-cols-4 gap-4">
+        {Array.from({ length: 4 }).map((_, i) => (
+          <Card key={i}>
+            <CardContent className="pt-6">
+              <div className="h-4 bg-gray-200 rounded w-24 animate-pulse" />
+              <div className="h-8 bg-gray-200 rounded w-16 mt-2 animate-pulse" />
+            </CardContent>
+          </Card>
+        ))}
+      </div>
+      {/* Chart skeletons */}
+      <div className="grid grid-cols-1 lg:grid-cols-2 gap-6">
+        {Array.from({ length: 3 }).map((_, i) => (
+          <Card key={i} className={i === 0 ? "lg:col-span-2" : ""}>
+            <CardHeader>
+              <div className="h-6 bg-gray-200 rounded w-40 animate-pulse" />
+            </CardHeader>
+            <CardContent>
+              <div className="h-64 bg-gray-100 rounded animate-pulse" />
+            </CardContent>
+          </Card>
+        ))}
+      </div>
+    </div>
+  );
+}
+
+function EmptyState(): ReactElement {
+  return (
+    <div
+      className="flex flex-col items-center justify-center py-16 text-center"
+      data-testid="empty-state"
+    >
+      <div className="text-4xl mb-4">📊</div>
+      <h2 className="text-xl font-semibold text-gray-700 mb-2">No usage data yet</h2>
+      <p className="text-gray-500 max-w-md">
+        Once you start using AI-powered features, your token usage and cost data will appear here.
+      </p>
+    </div>
+  );
+}
+
+// ─── Main Page Component ─────────────────────────────────────────────
+
+export default function UsagePage(): ReactElement {
+  const [timeRange, setTimeRange] = useState<TimeRange>("30d");
+  const [isLoading, setIsLoading] = useState(true);
+  const [isEmpty, setIsEmpty] = useState(false);
+  const [error, setError] = useState<string | null>(null);
+
+  const [summary, setSummary] = useState<UsageSummary | null>(null);
+  const [tokenUsage, setTokenUsage] = useState<TokenUsagePoint[]>([]);
+  const [costBreakdown, setCostBreakdown] = useState<CostBreakdownItem[]>([]);
+  const [taskOutcomes, setTaskOutcomes] = useState<TaskOutcomeItem[]>([]);
+
+  const loadData = useCallback(async (range: TimeRange): Promise<void> => {
+    setIsLoading(true);
+    setError(null);
+
+    try {
+      const [summaryData, tokenData, costData, outcomeData] = await Promise.all([
+        fetchUsageSummary(range),
+        fetchTokenUsage(range),
+        fetchCostBreakdown(range),
+        fetchTaskOutcomes(range),
+      ]);
+
+      setSummary(summaryData);
+      setTokenUsage(tokenData);
+      setCostBreakdown(costData);
+      setTaskOutcomes(outcomeData);
+
+      // Check if there's any meaningful data
+      setIsEmpty(summaryData.taskCount === 0);
+    } catch (err) {
+      setError(
+        err instanceof Error
+          ? err.message
+          : "We had trouble loading usage data. Please try again when you're ready."
+      );
+    } finally {
+      setIsLoading(false);
+    }
+  }, []);
+
+  useEffect(() => {
+    void loadData(timeRange);
+  }, [timeRange, loadData]);
+
+  function handleTimeRangeChange(range: TimeRange): void {
+    setTimeRange(range);
+  }
+
+  return (
+    <main className="container mx-auto px-4 py-8">
+      {/* Header */}
+      <div className="flex flex-col sm:flex-row sm:items-center sm:justify-between mb-8 gap-4">
+        <div>
+          <h1 className="text-3xl font-bold text-gray-900">Usage</h1>
+          <p className="text-gray-600 mt-1">Token usage and cost overview</p>
+        </div>
+
+        {/* Time range selector */}
+        <div className="flex gap-1 bg-gray-100 rounded-lg p-1" role="group" aria-label="Time range">
+          {TIME_RANGES.map(({ value, label }) => (
+            <button
+              key={value}
+              onClick={() => {
+                handleTimeRangeChange(value);
+              }}
+              className={`px-4 py-2 text-sm font-medium rounded-md transition-colors ${
+                timeRange === value
+                  ? "bg-white text-gray-900 shadow-sm"
+                  : "text-gray-600 hover:text-gray-900"
+              }`}
+              aria-pressed={timeRange === value}
+            >
+              {label}
+            </button>
+          ))}
+        </div>
+      </div>
+
+      {/* Error state */}
+      {error !== null ? (
+        <div className="rounded-lg border border-amber-200 bg-amber-50 p-6 text-center">
+          <p className="text-amber-800">{error}</p>
+          <button
+            onClick={() => void loadData(timeRange)}
+            className="mt-4 rounded-md bg-amber-600 px-4 py-2 text-sm font-medium text-white hover:bg-amber-700 transition-colors"
+          >
+            Try again
+          </button>
+        </div>
+      ) : isLoading ? (
+        <LoadingSkeleton />
+      ) : isEmpty ? (
+        <EmptyState />
+      ) : (
+        <div className="space-y-6">
+          {/* Summary Cards */}
+          <div
+            className="grid grid-cols-1 sm:grid-cols-2 lg:grid-cols-4 gap-4"
+            data-testid="summary-cards"
+          >
+            <SummaryCard
+              title="Total Tokens"
+              value={summary ? formatNumber(summary.totalTokens) : "0"}
+              subtitle="Input + Output"
+            />
+            <SummaryCard
+              title="Estimated Cost"
+              value={summary ? formatCurrency(summary.totalCost) : "$0.00"}
+              subtitle="Based on provider pricing"
+            />
+            <SummaryCard
+              title="Task Count"
+              value={summary ? formatNumber(summary.taskCount) : "0"}
+              subtitle="AI-assisted tasks"
+            />
+            <SummaryCard
+              title="Quality Gate Pass Rate"
+              value={summary ? formatPercent(summary.avgQualityGatePassRate) : "0%"}
+              subtitle="Build, lint, test, typecheck"
+            />
+          </div>
+
+          {/* Charts */}
+          <div className="grid grid-cols-1 lg:grid-cols-2 gap-6">
+            {/* Token Usage Over Time — Full width */}
+            <Card className="lg:col-span-2">
+              <CardHeader>
+                <CardTitle className="text-lg">Token Usage Over Time</CardTitle>
+                <CardDescription>Input and output tokens by day</CardDescription>
+              </CardHeader>
+              <CardContent>
+                <div className="h-72" data-testid="token-usage-chart">
+                  <ResponsiveContainer width="100%" height="100%">
+                    <LineChart data={tokenUsage}>
+                      <CartesianGrid strokeDasharray="3 3" stroke={CHART_COLORS.grid} />
+                      <XAxis
+                        dataKey="date"
+                        tickFormatter={formatDateLabel}
+                        tick={{ fontSize: 12, fill: "#64748B" }}
+                        interval="preserveStartEnd"
+                      />
+                      <YAxis
+                        tickFormatter={formatNumber}
+                        tick={{ fontSize: 12, fill: "#64748B" }}
+                        width={60}
+                      />
+                      <Tooltip
+                        formatter={(value: number, name: string) => [
+                          formatNumber(value),
+                          name === "inputTokens" ? "Input Tokens" : "Output Tokens",
+                        ]}
+                        labelFormatter={formatDateLabel}
+                        contentStyle={{
+                          borderRadius: "8px",
+                          border: "1px solid #E2E8F0",
+                          boxShadow: "0 2px 8px rgba(0,0,0,0.08)",
+                        }}
+                      />
+                      <Legend
+                        formatter={(value: string) =>
+                          value === "inputTokens" ? "Input Tokens" : "Output Tokens"
+                        }
+                      />
+                      <Line
+                        type="monotone"
+                        dataKey="inputTokens"
+                        stroke={CHART_COLORS.inputTokens}
+                        strokeWidth={2}
+                        dot={false}
+                        activeDot={{ r: 4 }}
+                      />
+                      <Line
+                        type="monotone"
+                        dataKey="outputTokens"
+                        stroke={CHART_COLORS.outputTokens}
+                        strokeWidth={2}
+                        dot={false}
+                        activeDot={{ r: 4 }}
+                      />
+                    </LineChart>
+                  </ResponsiveContainer>
+                </div>
+              </CardContent>
+            </Card>
+
+            {/* Cost Breakdown by Model */}
+            <Card>
+              <CardHeader>
+                <CardTitle className="text-lg">Cost by Model</CardTitle>
+                <CardDescription>Estimated cost breakdown</CardDescription>
+              </CardHeader>
+              <CardContent>
+                <div className="h-72" data-testid="cost-breakdown-chart">
+                  <ResponsiveContainer width="100%" height="100%">
+                    <BarChart data={costBreakdown} layout="vertical">
+                      <CartesianGrid strokeDasharray="3 3" stroke={CHART_COLORS.grid} />
+                      <XAxis
+                        type="number"
+                        tickFormatter={(v: number) => formatCurrency(v)}
+                        tick={{ fontSize: 12, fill: "#64748B" }}
+                      />
+                      <YAxis
+                        type="category"
+                        dataKey="model"
+                        tick={{ fontSize: 11, fill: "#64748B" }}
+                        width={140}
+                      />
+                      <Tooltip
+                        formatter={(value: number) => [formatCurrency(value), "Cost"]}
+                        contentStyle={{
+                          borderRadius: "8px",
+                          border: "1px solid #E2E8F0",
+                          boxShadow: "0 2px 8px rgba(0,0,0,0.08)",
+                        }}
+                      />
+                      <Bar dataKey="cost" fill={CHART_COLORS.barFill} radius={[0, 4, 4, 0]} />
+                    </BarChart>
+                  </ResponsiveContainer>
+                </div>
+              </CardContent>
+            </Card>
+
+            {/* Task Outcomes */}
+            <Card>
+              <CardHeader>
+                <CardTitle className="text-lg">Task Outcomes</CardTitle>
+                <CardDescription>Distribution of task completion results</CardDescription>
+              </CardHeader>
+              <CardContent>
+                <div
+                  className="h-72 flex items-center justify-center"
+                  data-testid="task-outcomes-chart"
+                >
+                  <ResponsiveContainer width="100%" height="100%">
+                    <PieChart>
+                      <Pie
+                        data={toFillData(taskOutcomes)}
+                        cx="50%"
+                        cy="50%"
+                        innerRadius={60}
+                        outerRadius={100}
+                        paddingAngle={2}
+                        dataKey="count"
+                        nameKey="outcome"
+                        label={({ outcome, count }: { outcome: string; count: number }) =>
+                          `${outcome}: ${String(count)}`
+                        }
+                      />
+                      <Tooltip
+                        formatter={(value: number, name: string) => [value, name]}
+                        contentStyle={{
+                          borderRadius: "8px",
+                          border: "1px solid #E2E8F0",
+                          boxShadow: "0 2px 8px rgba(0,0,0,0.08)",
+                        }}
+                      />
+                      <Legend />
+                    </PieChart>
+                  </ResponsiveContainer>
+                </div>
+              </CardContent>
+            </Card>
+          </div>
+        </div>
+      )}
+    </main>
+  );
+}
diff --git a/apps/web/src/components/layout/Navigation.tsx b/apps/web/src/components/layout/Navigation.tsx
index e961e47..5757717 100644
--- a/apps/web/src/components/layout/Navigation.tsx
+++ b/apps/web/src/components/layout/Navigation.tsx
@@ -16,6 +16,7 @@ export function Navigation(): React.JSX.Element {
     { href: "/tasks", label: "Tasks" },
     { href: "/calendar", label: "Calendar" },
     { href: "/knowledge", label: "Knowledge" },
+    { href: "/usage", label: "Usage" },
   ];
 
   // Global keyboard shortcut for search (Cmd+K or Ctrl+K)
diff --git a/apps/web/src/lib/api/index.ts b/apps/web/src/lib/api/index.ts
index 8c1629c..5877de4 100644
--- a/apps/web/src/lib/api/index.ts
+++ b/apps/web/src/lib/api/index.ts
@@ -12,3 +12,4 @@ export * from "./knowledge";
 export * from "./domains";
 export * from "./teams";
 export * from "./personalities";
+export * from "./telemetry";
diff --git a/apps/web/src/lib/api/telemetry.ts b/apps/web/src/lib/api/telemetry.ts
new file mode 100644
index 0000000..49cb779
--- /dev/null
+++ b/apps/web/src/lib/api/telemetry.ts
@@ -0,0 +1,187 @@
+/**
+ * Telemetry API Client
+ * Handles telemetry data fetching for the usage dashboard.
+ *
+ * NOTE: Currently returns mock/placeholder data since the telemetry API
+ * aggregation endpoints don't exist yet. The important thing is the UI structure.
+ * When the backend endpoints are ready, replace mock calls with real apiGet() calls.
+ */
+
+import { apiGet, type ApiResponse } from "./client";
+
+// ─── Types ───────────────────────────────────────────────────────────
+
+export type TimeRange = "7d" | "30d" | "90d";
+
+export interface UsageSummary {
+  totalTokens: number;
+  totalCost: number;
+  taskCount: number;
+  avgQualityGatePassRate: number;
+}
+
+export interface TokenUsagePoint {
+  date: string;
+  inputTokens: number;
+  outputTokens: number;
+  totalTokens: number;
+}
+
+export interface CostBreakdownItem {
+  model: string;
+  provider: string;
+  cost: number;
+  taskCount: number;
+}
+
+export interface TaskOutcomeItem {
+  outcome: string;
+  count: number;
+  color: string;
+}
+
+export interface EstimateParams {
+  taskType: string;
+  model: string;
+  provider: string;
+  complexity: string;
+}
+
+export interface EstimateResponse {
+  prediction: {
+    input_tokens: { median: number; p75: number; p90: number };
+    output_tokens: { median: number; p75: number; p90: number };
+    cost_usd_micros: Record<string, number>;
+    quality: { gate_pass_rate: number; success_rate: number };
+  } | null;
+  metadata: {
+    sample_size: number;
+    confidence: "none" | "low" | "medium" | "high";
+  };
+}
+
+// ─── Mock Data Generators ────────────────────────────────────────────
+
+function generateDateRange(range: TimeRange): string[] {
+  const days = range === "7d" ? 7 : range === "30d" ? 30 : 90;
+  const dates: string[] = [];
+  const now = new Date();
+
+  for (let i = days - 1; i >= 0; i--) {
+    const d = new Date(now);
+    d.setDate(d.getDate() - i);
+    dates.push(d.toISOString().split("T")[0]);
+  }
+
+  return dates;
+}
+
+function generateMockTokenUsage(range: TimeRange): TokenUsagePoint[] {
+  const dates = generateDateRange(range);
+
+  return dates.map((date) => {
+    const baseInput = 8000 + Math.floor(Math.random() * 12000);
+    const baseOutput = 3000 + Math.floor(Math.random() * 7000);
+    return {
+      date,
+      inputTokens: baseInput,
+      outputTokens: baseOutput,
+      totalTokens: baseInput + baseOutput,
+    };
+  });
+}
+
+function generateMockSummary(range: TimeRange): UsageSummary {
+  const multiplier = range === "7d" ? 1 : range === "30d" ? 4 : 12;
+  return {
+    totalTokens: 245_800 * multiplier,
+    totalCost: 3.42 * multiplier,
+    taskCount: 47 * multiplier,
+    avgQualityGatePassRate: 0.87,
+  };
+}
+
+function generateMockCostBreakdown(): CostBreakdownItem[] {
+  return [
+    { model: "claude-sonnet-4-5", provider: "anthropic", cost: 18.5, taskCount: 124 },
+    { model: "gpt-4o", provider: "openai", cost: 12.3, taskCount: 89 },
+    { model: "claude-haiku-3.5", provider: "anthropic", cost: 4.2, taskCount: 156 },
+    { model: "llama-3.3-70b", provider: "ollama", cost: 0, taskCount: 67 },
+    { model: "gemini-2.0-flash", provider: "google", cost: 2.8, taskCount: 42 },
+  ];
+}
+
+// PDA-friendly colors: calm, no aggressive reds
+function generateMockTaskOutcomes(): TaskOutcomeItem[] {
+  return [
+    { outcome: "Success", count: 312, color: "#6EBF8B" },
+    { outcome: "Partial", count: 48, color: "#F5C862" },
+    { outcome: "Timeout", count: 18, color: "#94A3B8" },
+    { outcome: "Incomplete", count: 22, color: "#C4A5DE" },
+  ];
+}
+
+// ─── API Functions ───────────────────────────────────────────────────
+
+/**
+ * Fetch usage summary data (total tokens, cost, task count, quality rate)
+ */
+export async function fetchUsageSummary(timeRange: TimeRange): Promise<UsageSummary> {
+  // TODO: Replace with real API call when backend aggregation endpoints are ready
+  // const response = await apiGet<ApiResponse<UsageSummary>>(`/api/telemetry/summary?range=${timeRange}`);
+  // return response.data;
+  void apiGet; // suppress unused import warning in the meantime
+  await new Promise((resolve) => setTimeout(resolve, 200));
+  return generateMockSummary(timeRange);
+}
+
+/**
+ * Fetch token usage time series for charts
+ */
+export async function fetchTokenUsage(timeRange: TimeRange): Promise<TokenUsagePoint[]> {
+  // TODO: Replace with real API call
+  // const response = await apiGet<ApiResponse<TokenUsagePoint[]>>(`/api/telemetry/tokens?range=${timeRange}`);
+  // return response.data;
+  await new Promise((resolve) => setTimeout(resolve, 250));
+  return generateMockTokenUsage(timeRange);
+}
+
+/**
+ * Fetch cost breakdown by model
+ */
+export async function fetchCostBreakdown(timeRange: TimeRange): Promise<CostBreakdownItem[]> {
+  // TODO: Replace with real API call
+  // const response = await apiGet<ApiResponse<CostBreakdownItem[]>>(`/api/telemetry/costs?range=${timeRange}`);
+  // return response.data;
+  await new Promise((resolve) => setTimeout(resolve, 200));
+  void timeRange;
+  return generateMockCostBreakdown();
+}
+
+/**
+ * Fetch task outcome distribution
+ */
+export async function fetchTaskOutcomes(timeRange: TimeRange): Promise<TaskOutcomeItem[]> {
+  // TODO: Replace with real API call
+  // const response = await apiGet<ApiResponse<TaskOutcomeItem[]>>(`/api/telemetry/outcomes?range=${timeRange}`);
+  // return response.data;
+  await new Promise((resolve) => setTimeout(resolve, 150));
+  void timeRange;
+  return generateMockTaskOutcomes();
+}
+
+/**
+ * Fetch cost/token estimate for a given task configuration.
+ * Uses the real GET /api/telemetry/estimate endpoint from TEL-006.
+ */
+export async function fetchEstimate(params: EstimateParams): Promise<EstimateResponse> {
+  const query = new URLSearchParams({
+    taskType: params.taskType,
+    model: params.model,
+    provider: params.provider,
+    complexity: params.complexity,
+  }).toString();
+
+  const response = await apiGet<ApiResponse<EstimateResponse>>(`/api/telemetry/estimate?${query}`);
+  return response.data;
+}
diff --git a/pnpm-lock.yaml b/pnpm-lock.yaml
index 8450600..6678c42 100644
--- a/pnpm-lock.yaml
+++ b/pnpm-lock.yaml
@@ -391,7 +391,7 @@ importers:
         version: 3.2.0
       '@xyflow/react':
         specifier: ^12.5.3
-        version: 12.10.0(@types/react@19.2.10)(react-dom@19.2.4(react@19.2.4))(react@19.2.4)
+        version: 12.10.0(@types/react@19.2.10)(immer@11.1.4)(react-dom@19.2.4(react@19.2.4))(react@19.2.4)
       better-auth:
         specifier: ^1.4.17
         version: 1.4.17(@prisma/client@6.19.2(prisma@6.19.2(magicast@0.3.5)(typescript@5.9.3))(typescript@5.9.3))(better-sqlite3@12.6.2)(drizzle-orm@0.41.0(@opentelemetry/api@1.9.0)(@prisma/client@6.19.2(prisma@6.19.2(magicast@0.3.5)(typescript@5.9.3))(typescript@5.9.3))(@types/pg@8.16.0)(better-sqlite3@12.6.2)(kysely@0.28.10)(pg@8.17.2)(prisma@6.19.2(magicast@0.3.5)(typescript@5.9.3)))(next@16.1.6(@babel/core@7.28.6)(@opentelemetry/api@1.9.0)(react-dom@19.2.4(react@19.2.4))(react@19.2.4))(pg@8.17.2)(prisma@6.19.2(magicast@0.3.5)(typescript@5.9.3))(react-dom@19.2.4(react@19.2.4))(react@19.2.4)(vitest@3.2.4(@types/node@22.19.7)(jiti@2.6.1)(jsdom@26.1.0)(terser@5.46.0)(tsx@4.21.0)(yaml@2.8.2))
@@ -422,6 +422,9 @@ importers:
       react-grid-layout:
         specifier: ^2.2.2
         version: 2.2.2(react-dom@19.2.4(react@19.2.4))(react@19.2.4)
+      recharts:
+        specifier: ^3.7.0
+        version: 3.7.0(@types/react@19.2.10)(react-dom@19.2.4(react@19.2.4))(react-is@17.0.2)(react@19.2.4)(redux@5.0.1)
       socket.io-client:
         specifier: ^4.8.3
         version: 4.8.3
@@ -2431,6 +2434,17 @@ packages:
   '@protobufjs/utf8@1.1.0':
     resolution: {integrity: sha512-Vvn3zZrhQZkkBE8LSuW3em98c0FwgO4nxzv6OdSxPKJIEKY2bGbHn+mhGIPerzI4twdxaP8/0+06HBpwf345Lw==}
 
+  '@reduxjs/toolkit@2.11.2':
+    resolution: {integrity: sha512-Kd6kAHTA6/nUpp8mySPqj3en3dm0tdMIgbttnQ1xFMVpufoj+ADi8pXLBsd4xzTRHQa7t/Jv8W5UnCuW4kuWMQ==}
+    peerDependencies:
+      react: ^16.9.0 || ^17.0.0 || ^18 || ^19
+      react-redux: ^7.2.1 || ^8.1.3 || ^9.0.0
+    peerDependenciesMeta:
+      react:
+        optional: true
+      react-redux:
+        optional: true
+
   '@rolldown/pluginutils@1.0.0-beta.27':
     resolution: {integrity: sha512-+d0F4MKMCbeVUJwG96uQ4SgAznZNSq93I3V+9NHA4OpvqG8mRCpGdKmK8l/dl02h2CCDHwW2FqilnTyDcAnqjA==}
 
@@ -2586,6 +2600,9 @@ packages:
   '@standard-schema/spec@1.1.0':
     resolution: {integrity: sha512-l2aFy5jALhniG5HgqrD6jXLi/rUWrKvqN/qJx6yoJsgKhblVd+iqqU4RCXavm/jPityDo5TCvKMnpjKnOriy0w==}
 
+  '@standard-schema/utils@0.3.0':
+    resolution: {integrity: sha512-e7Mew686owMaPJVNNLs55PUvgz371nKgwsc4vxE49zsODpJEnxgxRo2y/OKrqueavXgZNMDVj3DdHFlaSAeU8g==}
+
   '@swc/core-darwin-arm64@1.15.11':
     resolution: {integrity: sha512-QoIupRWVH8AF1TgxYyeA5nS18dtqMuxNwchjBIwJo3RdwLEFiJq6onOx9JAxHtuPwUkIVuU2Xbp+jCJ7Vzmgtg==}
     engines: {node: '>=10'}
@@ -2980,6 +2997,9 @@ packages:
   '@types/trusted-types@2.0.7':
     resolution: {integrity: sha512-ScaPdn1dQczgbl0QFTeTOmVHFULt394XJgOQNoyVhZ6r2vLnMLJfBPd53SB52T/3G36VI1/g2MZaX0cwDuXsfw==}
 
+  '@types/use-sync-external-store@0.0.6':
+    resolution: {integrity: sha512-zFDAD+tlpf2r4asuHEj0XH6pY6i0g5NeAHPn+15wk3BV6JA69eERFXC1gyGThDkVa1zCyKr5jox1+2LbV/AMLg==}
+
   '@types/validator@13.15.10':
     resolution: {integrity: sha512-T8L6i7wCuyoK8A/ZeLYt1+q0ty3Zb9+qbSSvrIVitzT3YjZqkTZ40IbRsPanlB4h1QB3JVL1SYCdR6ngtFYcuA==}
 
@@ -3989,6 +4009,9 @@ packages:
       supports-color:
         optional: true
 
+  decimal.js-light@2.5.1:
+    resolution: {integrity: sha512-qIMFpTMZmny+MMIitAB6D7iVPEorVw6YQRWkvarTkT4tBeSLLiHzcwj6q0MmYSFCiVpiqPJTJEYIrpcPzVEIvg==}
+
   decimal.js@10.6.0:
     resolution: {integrity: sha512-YpgQiITW3JXGntzdUmyUR1V812Hn8T1YVXhCu+wO3OpS4eU9l4YdD3qjyiKdV6mvV29zapkMeD390UVEf2lkUg==}
 
@@ -4299,6 +4322,9 @@ packages:
     resolution: {integrity: sha512-j6vWzfrGVfyXxge+O0x5sh6cvxAog0a/4Rdd2K36zCMV5eJ+/+tOAngRO8cODMNWbVRdVlmGZQL2YS3yR8bIUA==}
     engines: {node: '>= 0.4'}
 
+  es-toolkit@1.44.0:
+    resolution: {integrity: sha512-6penXeZalaV88MM3cGkFZZfOoLGWshWWfdy0tWw/RlVVyhvMaWSBTOvXNeiW3e5FwdS5ePW0LGEu17zT139ktg==}
+
   esbuild@0.27.2:
     resolution: {integrity: sha512-HyNQImnsOC7X9PMNaCIeAm4ISCQXs5a5YasTXVliKv4uuBo1dKrG0A+uQS8M5eXjVMnLg3WgXaKvprHlFJQffw==}
     engines: {node: '>=18'}
@@ -4708,6 +4734,12 @@ packages:
     resolution: {integrity: sha512-Hs59xBNfUIunMFgWAbGX5cq6893IbWg4KnrjbYwX3tx0ztorVgTDA6B2sxf8ejHJ4wz8BqGUMYlnzNBer5NvGg==}
     engines: {node: '>= 4'}
 
+  immer@10.2.0:
+    resolution: {integrity: sha512-d/+XTN3zfODyjr89gM3mPq1WNX2B8pYsu7eORitdwyA2sBubnTl3laYlBk4sXY5FUa5qTZGBDPJICVbvqzjlbw==}
+
+  immer@11.1.4:
+    resolution: {integrity: sha512-XREFCPo6ksxVzP4E0ekD5aMdf8WMwmdNaz6vuvxgI40UaEiu6q3p8X52aU6GdyvLY3XXX/8R7JOTXStz/nBbRw==}
+
   import-fresh@3.3.1:
     resolution: {integrity: sha512-TR3KfrTZTYLPB6jUjfx6MF9WcWrHL9su5TObK4ZkYgBdWKPOFoSoQIdEuTuR82pmtxH2spWG9h6etwfr1pLBqQ==}
     engines: {node: '>=6'}
@@ -5650,6 +5682,18 @@ packages:
   react-is@17.0.2:
     resolution: {integrity: sha512-w2GsyukL62IJnlaff/nRegPQR94C/XXamvMWmSHRJ4y7Ts/4ocGRmTHvOs8PSE6pB3dWOrD/nueuU5sduBsQ4w==}
 
+  react-redux@9.2.0:
+    resolution: {integrity: sha512-ROY9fvHhwOD9ySfrF0wmvu//bKCQ6AeZZq1nJNtbDC+kk5DuSuNX/n6YWYF/SYy7bSba4D4FSz8DJeKY/S/r+g==}
+    peerDependencies:
+      '@types/react': ^18.2.25 || ^19
+      react: ^18.0 || ^19
+      redux: ^5.0.0
+    peerDependenciesMeta:
+      '@types/react':
+        optional: true
+      redux:
+        optional: true
+
   react-refresh@0.17.0:
     resolution: {integrity: sha512-z6F7K9bV85EfseRCp2bzrpyQ0Gkw1uLoCel9XBVWPg/TjRj94SkJzUTGfOa4bs7iJvBWtQG0Wq7wnI0syw3EBQ==}
     engines: {node: '>=0.10.0'}
@@ -5686,6 +5730,14 @@ packages:
     resolution: {integrity: sha512-9u/XQ1pvrQtYyMpZe7DXKv2p5CNvyVwzUB6uhLAnQwHMSgKMBR62lc7AHljaeteeHXn11XTAaLLUVZYVZyuRBQ==}
     engines: {node: '>= 20.19.0'}
 
+  recharts@3.7.0:
+    resolution: {integrity: sha512-l2VCsy3XXeraxIID9fx23eCb6iCBsxUQDnE8tWm6DFdszVAO7WVY/ChAD9wVit01y6B2PMupYiMmQwhgPHc9Ew==}
+    engines: {node: '>=18'}
+    peerDependencies:
+      react: ^16.8.0 || ^17.0.0 || ^18.0.0 || ^19.0.0
+      react-dom: ^16.0.0 || ^17.0.0 || ^18.0.0 || ^19.0.0
+      react-is: ^16.8.0 || ^17.0.0 || ^18.0.0 || ^19.0.0
+
   redent@3.0.0:
     resolution: {integrity: sha512-6tDA8g98We0zd0GvVeMT9arEOnTw9qM03L9cJXaCjrip1OO764RDBLBfrB4cwzNGDj5OA5ioymC9GkizgWJDUg==}
     engines: {node: '>=8'}
@@ -5698,6 +5750,14 @@ packages:
     resolution: {integrity: sha512-DJnGAeenTdpMEH6uAJRK/uiyEIH9WVsUmoLwzudwGJUwZPp80PDBWPHXSAGNPwNvIXAbe7MSUB1zQFugFml66A==}
     engines: {node: '>=4'}
 
+  redux-thunk@3.1.0:
+    resolution: {integrity: sha512-NW2r5T6ksUKXCabzhL9z+h206HQw/NJkcLm1GPImRQ8IzfXwRGqjVhKJGauHirT0DAuyy6hjdnMZaRoAcy0Klw==}
+    peerDependencies:
+      redux: ^5.0.0
+
+  redux@5.0.1:
+    resolution: {integrity: sha512-M9/ELqF6fy8FwmkpnF0S3YKOqMyoWJ4+CS5Efg2ct3oY9daQvd/Pc71FpGZsVsbl3Cpb+IIcjBDUnnyBdQbq4w==}
+
   reflect-metadata@0.2.2:
     resolution: {integrity: sha512-urBwgfrvVP/eAyXx4hluJivBKzuEbSQs9rKWCrCkbSxNv8mxPcUZKeuoF3Uy4mJl3Lwprp6yy5/39VWigZ4K6Q==}
 
@@ -5720,6 +5780,9 @@ packages:
     resolution: {integrity: sha512-gAZ+kLqBdHarXB64XpAe2VCjB7rIRv+mU8tfRWziHRJ5umKsIHN2tLLv6EtMw7WCdP19S0ERVMldNvxYCHnhSQ==}
     engines: {node: '>=8.6.0'}
 
+  reselect@5.1.1:
+    resolution: {integrity: sha512-K/BG6eIky/SBpzfHZv/dd+9JBFiS4SWV7FIujVyJRux6e45+73RaUHXLmIR1f7WOMaQ0U1km6qwklRQxpJJY0w==}
+
   resize-observer-polyfill@1.5.1:
     resolution: {integrity: sha512-LwZrotdHOo12nQuZlHEmtuXdqGoOD0OhaxopaNFxWzInpEgaLWoVuAMbTzixuosCx2nEG58ngzW3vxdWoxIgdg==}
 
@@ -6115,6 +6178,9 @@ packages:
   text-decoder@1.2.3:
     resolution: {integrity: sha512-3/o9z3X0X0fTupwsYvR03pJ/DjWuqqrfwBgTQzdWDiQSm9KitAyz/9WqsT2JQW7KV2m+bC2ol/zqpW37NHxLaA==}
 
+  tiny-invariant@1.3.3:
+    resolution: {integrity: sha512-+FbBPE1o9QAYvviau/qC5SE3caw21q3xkvWKBtja5vgqOWIHHJ3ioaq1VPfn/Szqctz2bU/oYeKd9/z5BL+PVg==}
+
   tinybench@2.9.0:
     resolution: {integrity: sha512-0+DUvqWMValLmha6lr4kD8iAMK1HzV0/aKnCtWb9v9641TnP/MFb7Pc2bxoxQjTXAErryXVgUOfv2YqNllqGeg==}
 
@@ -6366,6 +6432,9 @@ packages:
     resolution: {integrity: sha512-BNGbWLfd0eUPabhkXUVm0j8uuvREyTh5ovRa/dyow/BqAbZJyC+5fU+IzQOzmAKzYqYRAISoRhdQr3eIZ/PXqg==}
     engines: {node: '>= 0.8'}
 
+  victory-vendor@37.3.6:
+    resolution: {integrity: sha512-SbPDPdDBYp+5MJHhBCAyI7wKM3d5ivekigc2Dk2s7pgbZ9wIgIBYGVw4zGHBml/qTFbexrofXW6Gu4noGxrOwQ==}
+
   vite-node@3.2.4:
     resolution: {integrity: sha512-EbKSKh+bh1E1IFxeO0pg1n4dvoOTt0UDiXMd/qn++r98+jPO1xtJilvXldeuQ8giIB5IkpjCgMleHMNEsGH6pg==}
     engines: {node: ^18.0.0 || ^20.0.0 || >=22.0.0}
@@ -7047,7 +7116,7 @@ snapshots:
       chalk: 5.6.2
       commander: 12.1.0
       dotenv: 17.2.4
-      drizzle-orm: 0.41.0(@opentelemetry/api@1.9.0)(@prisma/client@6.19.2(prisma@6.19.2(magicast@0.3.5)(typescript@5.9.3))(typescript@5.9.3))(@types/pg@8.16.0)(better-sqlite3@12.6.2)(kysely@0.28.10)(pg@8.17.2)(prisma@6.19.2(magicast@0.3.5)(typescript@5.9.3))
+      drizzle-orm: 0.41.0(@opentelemetry/api@1.9.0)(@prisma/client@5.22.0(prisma@6.19.2(magicast@0.3.5)(typescript@5.9.3)))(@types/pg@8.16.0)(better-sqlite3@12.6.2)(kysely@0.28.10)(pg@8.17.2)(prisma@6.19.2(magicast@0.3.5)(typescript@5.9.3))
       open: 10.2.0
       pg: 8.17.2
       prettier: 3.8.1
@@ -8904,6 +8973,18 @@ snapshots:
 
   '@protobufjs/utf8@1.1.0': {}
 
+  '@reduxjs/toolkit@2.11.2(react-redux@9.2.0(@types/react@19.2.10)(react@19.2.4)(redux@5.0.1))(react@19.2.4)':
+    dependencies:
+      '@standard-schema/spec': 1.1.0
+      '@standard-schema/utils': 0.3.0
+      immer: 11.1.4
+      redux: 5.0.1
+      redux-thunk: 3.1.0(redux@5.0.1)
+      reselect: 5.1.1
+    optionalDependencies:
+      react: 19.2.4
+      react-redux: 9.2.0(@types/react@19.2.10)(react@19.2.4)(redux@5.0.1)
+
   '@rolldown/pluginutils@1.0.0-beta.27': {}
 
   '@rollup/pluginutils@5.3.0(rollup@4.57.0)':
@@ -9002,6 +9083,8 @@ snapshots:
 
   '@standard-schema/spec@1.1.0': {}
 
+  '@standard-schema/utils@0.3.0': {}
+
   '@swc/core-darwin-arm64@1.15.11':
     optional: true
 
@@ -9449,6 +9532,8 @@ snapshots:
   '@types/trusted-types@2.0.7':
     optional: true
 
+  '@types/use-sync-external-store@0.0.6': {}
+
   '@types/validator@13.15.10': {}
 
   '@types/ws@8.18.1':
@@ -9768,13 +9853,13 @@ snapshots:
 
   '@xtuc/long@4.2.2': {}
 
-  '@xyflow/react@12.10.0(@types/react@19.2.10)(react-dom@19.2.4(react@19.2.4))(react@19.2.4)':
+  '@xyflow/react@12.10.0(@types/react@19.2.10)(immer@11.1.4)(react-dom@19.2.4(react@19.2.4))(react@19.2.4)':
     dependencies:
       '@xyflow/system': 0.0.74
       classcat: 5.0.5
       react: 19.2.4
       react-dom: 19.2.4(react@19.2.4)
-      zustand: 4.5.7(@types/react@19.2.10)(react@19.2.4)
+      zustand: 4.5.7(@types/react@19.2.10)(immer@11.1.4)(react@19.2.4)
     transitivePeerDependencies:
       - '@types/react'
       - immer
@@ -9978,7 +10063,7 @@ snapshots:
     optionalDependencies:
       '@prisma/client': 5.22.0(prisma@6.19.2(magicast@0.3.5)(typescript@5.9.3))
       better-sqlite3: 12.6.2
-      drizzle-orm: 0.41.0(@opentelemetry/api@1.9.0)(@prisma/client@6.19.2(prisma@6.19.2(magicast@0.3.5)(typescript@5.9.3))(typescript@5.9.3))(@types/pg@8.16.0)(better-sqlite3@12.6.2)(kysely@0.28.10)(pg@8.17.2)(prisma@6.19.2(magicast@0.3.5)(typescript@5.9.3))
+      drizzle-orm: 0.41.0(@opentelemetry/api@1.9.0)(@prisma/client@5.22.0(prisma@6.19.2(magicast@0.3.5)(typescript@5.9.3)))(@types/pg@8.16.0)(better-sqlite3@12.6.2)(kysely@0.28.10)(pg@8.17.2)(prisma@6.19.2(magicast@0.3.5)(typescript@5.9.3))
       next: 16.1.6(@babel/core@7.28.6)(@opentelemetry/api@1.9.0)(react-dom@19.2.4(react@19.2.4))(react@19.2.4)
       pg: 8.17.2
       prisma: 6.19.2(magicast@0.3.5)(typescript@5.9.3)
@@ -10003,7 +10088,7 @@ snapshots:
     optionalDependencies:
       '@prisma/client': 6.19.2(prisma@6.19.2(magicast@0.3.5)(typescript@5.9.3))(typescript@5.9.3)
       better-sqlite3: 12.6.2
-      drizzle-orm: 0.41.0(@opentelemetry/api@1.9.0)(@prisma/client@6.19.2(prisma@6.19.2(magicast@0.3.5)(typescript@5.9.3))(typescript@5.9.3))(@types/pg@8.16.0)(better-sqlite3@12.6.2)(kysely@0.28.10)(pg@8.17.2)(prisma@6.19.2(magicast@0.3.5)(typescript@5.9.3))
+      drizzle-orm: 0.41.0(@opentelemetry/api@1.9.0)(@prisma/client@5.22.0(prisma@6.19.2(magicast@0.3.5)(typescript@5.9.3)))(@types/pg@8.16.0)(better-sqlite3@12.6.2)(kysely@0.28.10)(pg@8.17.2)(prisma@6.19.2(magicast@0.3.5)(typescript@5.9.3))
       next: 16.1.6(@babel/core@7.28.6)(@opentelemetry/api@1.9.0)(react-dom@19.2.4(react@19.2.4))(react@19.2.4)
       pg: 8.17.2
       prisma: 6.19.2(magicast@0.3.5)(typescript@5.9.3)
@@ -10626,6 +10711,8 @@ snapshots:
     dependencies:
       ms: 2.1.3
 
+  decimal.js-light@2.5.1: {}
+
   decimal.js@10.6.0: {}
 
   decompress-response@6.0.0:
@@ -10758,6 +10845,16 @@ snapshots:
 
   dotenv@17.2.4: {}
 
+  drizzle-orm@0.41.0(@opentelemetry/api@1.9.0)(@prisma/client@5.22.0(prisma@6.19.2(magicast@0.3.5)(typescript@5.9.3)))(@types/pg@8.16.0)(better-sqlite3@12.6.2)(kysely@0.28.10)(pg@8.17.2)(prisma@6.19.2(magicast@0.3.5)(typescript@5.9.3)):
+    optionalDependencies:
+      '@opentelemetry/api': 1.9.0
+      '@prisma/client': 5.22.0(prisma@6.19.2(magicast@0.3.5)(typescript@5.9.3))
+      '@types/pg': 8.16.0
+      better-sqlite3: 12.6.2
+      kysely: 0.28.10
+      pg: 8.17.2
+      prisma: 6.19.2(magicast@0.3.5)(typescript@5.9.3)
+
   drizzle-orm@0.41.0(@opentelemetry/api@1.9.0)(@prisma/client@6.19.2(prisma@6.19.2(magicast@0.3.5)(typescript@5.9.3))(typescript@5.9.3))(@types/pg@8.16.0)(better-sqlite3@12.6.2)(kysely@0.28.10)(pg@8.17.2)(prisma@6.19.2(magicast@0.3.5)(typescript@5.9.3)):
     optionalDependencies:
       '@opentelemetry/api': 1.9.0
@@ -10767,6 +10864,7 @@ snapshots:
       kysely: 0.28.10
       pg: 8.17.2
       prisma: 6.19.2(magicast@0.3.5)(typescript@5.9.3)
+    optional: true
 
   dunder-proto@1.0.1:
     dependencies:
@@ -10865,6 +10963,8 @@ snapshots:
       has-tostringtag: 1.0.2
       hasown: 2.0.2
 
+  es-toolkit@1.44.0: {}
+
   esbuild@0.27.2:
     optionalDependencies:
       '@esbuild/aix-ppc64': 0.27.2
@@ -11349,6 +11449,10 @@ snapshots:
 
   ignore@7.0.5: {}
 
+  immer@10.2.0: {}
+
+  immer@11.1.4: {}
+
   import-fresh@3.3.1:
     dependencies:
       parent-module: 1.0.1
@@ -12271,6 +12375,15 @@ snapshots:
 
   react-is@17.0.2: {}
 
+  react-redux@9.2.0(@types/react@19.2.10)(react@19.2.4)(redux@5.0.1):
+    dependencies:
+      '@types/use-sync-external-store': 0.0.6
+      react: 19.2.4
+      use-sync-external-store: 1.6.0(react@19.2.4)
+    optionalDependencies:
+      '@types/react': 19.2.10
+      redux: 5.0.1
+
   react-refresh@0.17.0: {}
 
   react-resizable@3.1.3(react-dom@19.2.4(react@19.2.4))(react@19.2.4):
@@ -12314,6 +12427,26 @@ snapshots:
 
   readdirp@5.0.0: {}
 
+  recharts@3.7.0(@types/react@19.2.10)(react-dom@19.2.4(react@19.2.4))(react-is@17.0.2)(react@19.2.4)(redux@5.0.1):
+    dependencies:
+      '@reduxjs/toolkit': 2.11.2(react-redux@9.2.0(@types/react@19.2.10)(react@19.2.4)(redux@5.0.1))(react@19.2.4)
+      clsx: 2.1.1
+      decimal.js-light: 2.5.1
+      es-toolkit: 1.44.0
+      eventemitter3: 5.0.4
+      immer: 10.2.0
+      react: 19.2.4
+      react-dom: 19.2.4(react@19.2.4)
+      react-is: 17.0.2
+      react-redux: 9.2.0(@types/react@19.2.10)(react@19.2.4)(redux@5.0.1)
+      reselect: 5.1.1
+      tiny-invariant: 1.3.3
+      use-sync-external-store: 1.6.0(react@19.2.4)
+      victory-vendor: 37.3.6
+    transitivePeerDependencies:
+      - '@types/react'
+      - redux
+
   redent@3.0.0:
     dependencies:
       indent-string: 4.0.0
@@ -12325,6 +12458,12 @@ snapshots:
     dependencies:
       redis-errors: 1.2.0
 
+  redux-thunk@3.1.0(redux@5.0.1):
+    dependencies:
+      redux: 5.0.1
+
+  redux@5.0.1: {}
+
   reflect-metadata@0.2.2: {}
 
   regexp-to-ast@0.5.0: {}
@@ -12343,6 +12482,8 @@ snapshots:
     transitivePeerDependencies:
       - supports-color
 
+  reselect@5.1.1: {}
+
   resize-observer-polyfill@1.5.1: {}
 
   resolve-from@4.0.0: {}
@@ -12863,6 +13004,8 @@ snapshots:
     transitivePeerDependencies:
       - react-native-b4a
 
+  tiny-invariant@1.3.3: {}
+
   tinybench@2.9.0: {}
 
   tinyexec@0.3.2: {}
@@ -13087,6 +13230,23 @@ snapshots:
 
   vary@1.1.2: {}
 
+  victory-vendor@37.3.6:
+    dependencies:
+      '@types/d3-array': 3.2.2
+      '@types/d3-ease': 3.0.2
+      '@types/d3-interpolate': 3.0.4
+      '@types/d3-scale': 4.0.9
+      '@types/d3-shape': 3.1.8
+      '@types/d3-time': 3.0.4
+      '@types/d3-timer': 3.0.2
+      d3-array: 3.2.4
+      d3-ease: 3.0.1
+      d3-interpolate: 3.0.1
+      d3-scale: 4.0.2
+      d3-shape: 3.2.0
+      d3-time: 3.1.0
+      d3-timer: 3.0.1
+
   vite-node@3.2.4(@types/node@22.19.7)(jiti@2.6.1)(terser@5.46.0)(tsx@4.21.0)(yaml@2.8.2):
     dependencies:
       cac: 6.7.14
@@ -13388,9 +13548,10 @@ snapshots:
 
   zod@4.3.6: {}
 
-  zustand@4.5.7(@types/react@19.2.10)(react@19.2.4):
+  zustand@4.5.7(@types/react@19.2.10)(immer@11.1.4)(react@19.2.4):
     dependencies:
       use-sync-external-store: 1.6.0(react@19.2.4)
     optionalDependencies:
       '@types/react': 19.2.10
+      immer: 11.1.4
       react: 19.2.4