diff --git a/Auto Run Docs/SpecKit-web-header-analyzer-Phase-03-Header-Input.md b/Auto Run Docs/SpecKit-web-header-analyzer-Phase-03-Header-Input.md
index 3d1ab71..d4ba29b 100644
--- a/Auto Run Docs/SpecKit-web-header-analyzer-Phase-03-Header-Input.md	
+++ b/Auto Run Docs/SpecKit-web-header-analyzer-Phase-03-Header-Input.md	
@@ -44,7 +44,7 @@ Note: `npx vitest run src/__tests__/AnalyseButton.test.tsx` passes; Vitest emits
 - [x] Ctrl+Enter keyboard shortcut triggers the analyse action
 - [x] Dark hacker theme is visible with correct colour palette
 - [x] Validation shows user-friendly errors for empty and oversized input
-- [ ] `npx eslint src/` and `npx prettier --check src/` pass with zero errors
+- [x] `npx eslint src/` and `npx prettier --check src/` pass with zero errors
 - [ ] Run `/speckit.analyze` to verify consistency
 
 Note: Wired `FileDropZone` into the main page to populate the header input state on drop.
diff --git a/frontend/src/__tests__/HeaderInput.test.tsx b/frontend/src/__tests__/HeaderInput.test.tsx
index 0c6a239..8ca7e75 100644
--- a/frontend/src/__tests__/HeaderInput.test.tsx
+++ b/frontend/src/__tests__/HeaderInput.test.tsx
@@ -39,7 +39,7 @@ const getTextarea = (container: HTMLElement): HTMLTextAreaElement => {
 };
 
 const getAlert = (container: HTMLElement): HTMLElement | null =>
-  container.querySelector("[role=\"alert\"]");
+  container.querySelector('[role="alert"]');
 
 afterEach(() => {
   while (cleanups.length > 0) {
diff --git a/frontend/src/app/page.tsx b/frontend/src/app/page.tsx
index dea2b5e..6c91a15 100644
--- a/frontend/src/app/page.tsx
+++ b/frontend/src/app/page.tsx
@@ -46,12 +46,10 @@ export default function Home() {
               Decode Suite
             </p>
             <div className="flex flex-col gap-3">
-              <h1 className="text-3xl font-semibold sm:text-4xl">
-                Decode Spam Headers
-              </h1>
+              <h1 className="text-3xl font-semibold sm:text-4xl">Decode Spam Headers</h1>
               <p className="max-w-2xl text-sm text-text/70 sm:text-base">
-                Paste SMTP headers or drop an EML/TXT file to reveal the
-                anti-spam signals baked into your message path.
+                Paste SMTP headers or drop an EML/TXT file to reveal the anti-spam signals baked
+                into your message path.
               </p>
             </div>
           </header>
@@ -63,12 +61,10 @@ export default function Home() {
               <FileDropZone onFileContent={setHeaderInput} />
 
               <div className="rounded-2xl border border-info/10 bg-surface p-6">
-                <p className="text-xs uppercase tracking-[0.2em] text-info/80">
-                  Ready To Analyse
-                </p>
+                <p className="text-xs uppercase tracking-[0.2em] text-info/80">Ready To Analyse</p>
                 <p className="mt-2 text-sm text-text/70">
-                  Once input is provided, run the analysis to reveal scoring,
-                  heuristics, and delivery path insights.
+                  Once input is provided, run the analysis to reveal scoring, heuristics, and
+                  delivery path insights.
                 </p>
                 <div className="mt-4 flex flex-col gap-3 sm:flex-row sm:items-center">
                   <AnalyseButton
diff --git a/frontend/src/components/FileDropZone.tsx b/frontend/src/components/FileDropZone.tsx
index b7d42da..2341d6c 100644
--- a/frontend/src/components/FileDropZone.tsx
+++ b/frontend/src/components/FileDropZone.tsx
@@ -104,11 +104,7 @@ export default function FileDropZone({ onFileContent }: FileDropZoneProps) {
     reader.readAsText(file);
   };
 
-  const borderClass = error
-    ? "border-spam/70"
-    : isDragging
-      ? "border-info"
-      : "border-info/40";
+  const borderClass = error ? "border-spam/70" : isDragging ? "border-info" : "border-info/40";
   const surfaceClass = isDragging ? "bg-surface" : "bg-surface/70";
 
   return (
diff --git a/frontend/src/components/HeaderInput.tsx b/frontend/src/components/HeaderInput.tsx
index 28c5ff4..e76e31e 100644
--- a/frontend/src/components/HeaderInput.tsx
+++ b/frontend/src/components/HeaderInput.tsx
@@ -4,10 +4,7 @@ import { type FormEvent, useEffect, useId, useRef, useState } from "react";
 import { FontAwesomeIcon } from "@fortawesome/react-fontawesome";
 import { faXmark } from "@fortawesome/free-solid-svg-icons";
 
-import {
-  MAX_HEADER_INPUT_BYTES,
-  validateHeaderInput,
-} from "../lib/header-validation";
+import { MAX_HEADER_INPUT_BYTES, validateHeaderInput } from "../lib/header-validation";
 
 type HeaderInputProps = {
   value: string;