diff --git a/Auto Run Docs/SpecKit-web-header-analyzer-Phase-05-Analysis-Execution.md b/Auto Run Docs/SpecKit-web-header-analyzer-Phase-05-Analysis-Execution.md
index 7a6e035..71357be 100644
--- a/Auto Run Docs/SpecKit-web-header-analyzer-Phase-05-Analysis-Execution.md	
+++ b/Auto Run Docs/SpecKit-web-header-analyzer-Phase-05-Analysis-Execution.md	
@@ -41,7 +41,7 @@ Frontend uses `fetch` with `ReadableStream` reader (not native `EventSource`, wh
 
 - [x] `pytest backend/tests/api/test_analysis_router.py` passes (all paths: happy, error, oversized, partial failure, timeout)
 - [x] All vitest tests pass: `npx vitest run src/__tests__/ProgressIndicator.test.tsx src/__tests__/useAnalysis.test.ts`
-- [ ] Submitting headers triggers backend analysis with SSE streaming
+- [x] Submitting headers triggers backend analysis with SSE streaming
 - [ ] Progress bar updates in real-time showing current test name and percentage
 - [ ] Countdown timer counts down from 30 seconds
 - [ ] Partial failures show inline error indicators per FR-25
diff --git a/frontend/src/__tests__/HomePage.test.tsx b/frontend/src/__tests__/HomePage.test.tsx
new file mode 100644
index 0000000..498b938
--- /dev/null
+++ b/frontend/src/__tests__/HomePage.test.tsx
@@ -0,0 +1,101 @@
+import type { ReactElement } from "react";
+import { act } from "react-dom/test-utils";
+import { createRoot } from "react-dom/client";
+import { afterEach, describe, expect, it, vi } from "vitest";
+
+import Home from "../app/page";
+
+const { submitSpy, cancelSpy } = vi.hoisted(() => ({
+  submitSpy: vi.fn().mockResolvedValue(undefined),
+  cancelSpy: vi.fn(),
+}));
+
+vi.mock("../hooks/useAnalysis", () => ({
+  __esModule: true,
+  default: () => ({
+    status: "idle",
+    progress: null,
+    result: null,
+    error: null,
+    submit: submitSpy,
+    cancel: cancelSpy,
+  }),
+}));
+
+type RenderResult = {
+  container: HTMLDivElement;
+};
+
+const cleanups: Array<() => void> = [];
+
+const render = (ui: ReactElement): RenderResult => {
+  const container = document.createElement("div");
+  document.body.appendChild(container);
+  const root = createRoot(container);
+
+  act(() => {
+    root.render(ui);
+  });
+
+  cleanups.push(() => {
+    act(() => {
+      root.unmount();
+    });
+    container.remove();
+  });
+
+  return { container };
+};
+
+const getTextarea = (container: HTMLElement): HTMLTextAreaElement => {
+  const textarea = container.querySelector("textarea");
+  if (!textarea) {
+    throw new Error("Expected header textarea to be rendered.");
+  }
+  return textarea as HTMLTextAreaElement;
+};
+
+const getAnalyseButton = (container: HTMLElement): HTMLButtonElement => {
+  const buttons = Array.from(container.querySelectorAll("button"));
+  const button = buttons.find((candidate) =>
+    (candidate.textContent ?? "").toLowerCase().includes("analyse"),
+  );
+  if (!button) {
+    throw new Error("Expected analyse button to be rendered.");
+  }
+  return button as HTMLButtonElement;
+};
+
+afterEach(() => {
+  while (cleanups.length > 0) {
+    const cleanup = cleanups.pop();
+    if (cleanup) {
+      cleanup();
+    }
+  }
+  submitSpy.mockClear();
+  cancelSpy.mockClear();
+});
+
+describe("Home page", () => {
+  it("submits analysis when analyse is clicked", () => {
+    const { container } = render(<Home />);
+    const textarea = getTextarea(container);
+
+    act(() => {
+      textarea.value = "Received: from mail.example.com";
+      textarea.dispatchEvent(new Event("input", { bubbles: true }));
+    });
+
+    const button = getAnalyseButton(container);
+    act(() => {
+      button.dispatchEvent(new MouseEvent("click", { bubbles: true }));
+    });
+
+    expect(submitSpy).toHaveBeenCalledTimes(1);
+    expect(submitSpy).toHaveBeenCalledWith({
+      headers: "Received: from mail.example.com",
+      config: { testIds: [], resolve: false, decodeAll: false },
+    });
+  });
+});
diff --git a/frontend/src/app/page.tsx b/frontend/src/app/page.tsx
index 6c91a15..5c608f4 100644
--- a/frontend/src/app/page.tsx
+++ b/frontend/src/app/page.tsx
@@ -1,41 +1,35 @@
 "use client";
 
-import { useEffect, useRef, useState } from "react";
+import { useCallback, useState } from "react";
 
 import AnalyseButton from "../components/AnalyseButton";
 import FileDropZone from "../components/FileDropZone";
 import HeaderInput from "../components/HeaderInput";
+import useAnalysis from "../hooks/useAnalysis";
 import { MAX_HEADER_INPUT_BYTES } from "../lib/header-validation";
+import type { AnalysisConfig } from "../types/analysis";
+
+const defaultConfig: AnalysisConfig = {
+  testIds: [],
+  resolve: false,
+  decodeAll: false,
+};
 
 export default function Home() {
   const [headerInput, setHeaderInput] = useState("");
-  const [isAnalyzing, setIsAnalyzing] = useState(false);
+  const { status, submit } = useAnalysis();
   const hasHeaderInput = headerInput.trim().length > 0;
   const isOversized = headerInput.length > MAX_HEADER_INPUT_BYTES;
   const canAnalyse = hasHeaderInput && !isOversized;
-  const analyseTimeoutRef = useRef<number | null>(null);
+  const isLoading = status === "submitting" || status === "analysing";
 
-  useEffect(() => {
-    return () => {
-      if (analyseTimeoutRef.current !== null) {
-        window.clearTimeout(analyseTimeoutRef.current);
-      }
-    };
-  }, []);
-
-  const handleAnalyse = () => {
+  const handleAnalyse = useCallback(() => {
     if (!canAnalyse) {
       return;
     }
 
-    setIsAnalyzing(true);
-    if (analyseTimeoutRef.current !== null) {
-      window.clearTimeout(analyseTimeoutRef.current);
-    }
-    analyseTimeoutRef.current = window.setTimeout(() => {
-      setIsAnalyzing(false);
-    }, 800);
-  };
+    void submit({ headers: headerInput, config: defaultConfig });
+  }, [canAnalyse, headerInput, submit]);
 
   return (
     <main className="min-h-screen bg-background text-text">
@@ -70,7 +64,7 @@ export default function Home() {
                   <AnalyseButton
                     hasInput={canAnalyse}
                     onAnalyse={handleAnalyse}
-                    isLoading={isAnalyzing}
+                    isLoading={isLoading}
                   />
                   <div className="flex items-center gap-2 text-xs text-text/60">
                     <kbd className="rounded-md border border-info/30 bg-background/40 px-2 py-1 font-mono">