feat(frontend): add reassurance strip and supported-formats section

Part of the Ombrora Convert redesign (Task 3/5).

frontend/src/components/FormatsGrid.jsx

@@ -0,0 +1,19 @@
+import { useTranslation } from 'react-i18next';
+import { FORMAT_FAMILIES } from '../data/formats.js';
+
+export function FormatsGrid() {
+  const { t } = useTranslation();
+  return (
+    <section className="formats-grid-section">
+      <h2>{t('formats.title')}</h2>
+      <div className="formats-grid">
+        {FORMAT_FAMILIES.map(({ key, formats }) => (
+          <div key={key} className="formats-family">
+            <h3>{t(`formats.${key}`)}</h3>
+            <p>{formats.join(', ').toUpperCase()}</p>
+          </div>
+        ))}
+      </div>
+    </section>
+  );
+}

frontend/src/components/ReassuranceStrip.jsx

@@ -0,0 +1,26 @@
+import { useTranslation } from 'react-i18next';
+import { Clock, LockKey, CloudArrowUp, HardDrives } from '@phosphor-icons/react';
+
+const ITEMS = [
+  { key: 'autoDelete', Icon: Clock },
+  { key: 'noAccount', Icon: LockKey },
+  { key: 'online', Icon: CloudArrowUp },
+  { key: 'maxSize', Icon: HardDrives },
+];
+
+export function ReassuranceStrip() {
+  const { t } = useTranslation();
+  return (
+    <section className="reassurance">
+      <h2>{t('reassurance.title')}</h2>
+      <ul className="reassurance-list">
+        {ITEMS.map(({ key, Icon }) => (
+          <li key={key}>
+            <Icon size={24} weight="regular" />
+            <span>{t(`reassurance.${key}`)}</span>
+          </li>
+        ))}
+      </ul>
+    </section>
+  );
+}

frontend/src/data/formats.js

@@ -0,0 +1,18 @@
+export const FORMAT_FAMILIES = [
+  {
+    key: 'images',
+    formats: ['jpg', 'jpeg', 'png', 'webp', 'gif', 'tiff', 'avif', 'heic', 'heif', 'ico'],
+  },
+  {
+    key: 'documents',
+    formats: ['docx', 'txt', 'html', 'md', 'pdf', 'csv', 'xlsx'],
+  },
+  {
+    key: 'fonts',
+    formats: ['ttf', 'otf', 'woff', 'dfont'],
+  },
+  {
+    key: 'ebooks',
+    formats: ['epub', 'fb2', 'lrf', 'mobi', 'pdb', 'rb', 'snb', 'tcr', 'azw3', 'pdf'],
+  },
+];

frontend/src/pages/HomePage.jsx

@@ -4,7 +4,10 @@ import { fetchFormats, uploadFiles } from '../api.js';
 import { FileCard } from '../FileCard.jsx';
 import { Dropzone } from '../components/Dropzone.jsx';
 import { FileConfigCard } from '../components/FileConfigCard.jsx';
+import { ReassuranceStrip } from '../components/ReassuranceStrip.jsx';
+import { FormatsGrid } from '../components/FormatsGrid.jsx';
 import '../styles/home.css';
+import '../styles/sections.css';
 
 const DEFAULT_QUALITY = {
   jpg: 80,
@@ -79,41 +82,46 @@ export function HomePage() {
   }
 
   return (
-    <section className="hero">
+    <>
-      <h1>{t('hero.title')}</h1>
+      <section className="hero">
-      <p>{t('hero.subtitle')}</p>
+        <h1>{t('hero.title')}</h1>
-      <Dropzone label={t('hero.dropzoneLabel')} onFilesSelected={handleFilesSelected} />
+        <p>{t('hero.subtitle')}</p>
+        <Dropzone label={t('hero.dropzoneLabel')} onFilesSelected={handleFilesSelected} />
 
-      {pendingFiles.length > 0 && (
+        {pendingFiles.length > 0 && (
-        <div className="pending-files">
+          <div className="pending-files">
-          <ul>
+            <ul>
-            {pendingFiles.map((item, index) => (
+              {pendingFiles.map((item, index) => (
-              <FileConfigCard
+                <FileConfigCard
-                key={`${item.file.name}-${index}`}
+                  key={`${item.file.name}-${index}`}
-                item={item}
+                  item={item}
-                index={index}
+                  index={index}
-                t={t}
+                  t={t}
-                onTargetFormatChange={updateTargetFormat}
+                  onTargetFormatChange={updateTargetFormat}
-                onQualityChange={updateQuality}
+                  onQualityChange={updateQuality}
-                onIconSizeChange={updateIconSize}
+                  onIconSizeChange={updateIconSize}
-              />
+                />
-            ))}
+              ))}
-          </ul>
+            </ul>
-          <button className="convert-button" onClick={handleConvert}>
+            <button className="convert-button" onClick={handleConvert}>
-            {t('hero.convert')}
+              {t('hero.convert')}
-          </button>
+            </button>
-        </div>
+          </div>
-      )}
-
-      <ul className="job-list">
-        {submittedJobs.map((job, index) =>
-          job.id ? (
-            <FileCard key={job.id} fileName={job.file} jobId={job.id} />
-          ) : (
-            <FileCard key={`${job.file}-${index}`} fileName={job.file} initialError={job.error} />
-          )
         )}
-      </ul>
+
-    </section>
+        <ul className="job-list">
+          {submittedJobs.map((job, index) =>
+            job.id ? (
+              <FileCard key={job.id} fileName={job.file} jobId={job.id} />
+            ) : (
+              <FileCard key={`${job.file}-${index}`} fileName={job.file} initialError={job.error} />
+            )
+          )}
+        </ul>
+      </section>
+
+      <ReassuranceStrip />
+      <FormatsGrid />
+    </>
   );
 }

frontend/src/styles/sections.css

@@ -0,0 +1,65 @@
+.reassurance,
+.formats-grid-section {
+  max-width: 960px;
+  margin: 0 auto;
+  padding: 2.5rem 1.5rem;
+  text-align: center;
+}
+
+.reassurance-list {
+  list-style: none;
+  padding: 0;
+  margin: 1.5rem 0 0;
+  display: grid;
+  grid-template-columns: 1fr;
+  gap: 1rem;
+}
+
+.reassurance-list li {
+  display: flex;
+  align-items: center;
+  gap: 0.75rem;
+  padding: 1rem;
+  border: 1px solid var(--color-border);
+  border-radius: 8px;
+  text-align: left;
+}
+
+.formats-grid {
+  display: grid;
+  grid-template-columns: 1fr;
+  gap: 1rem;
+  margin-top: 1.5rem;
+}
+
+.formats-family {
+  padding: 1rem;
+  border: 1px solid var(--color-border);
+  border-radius: 8px;
+  text-align: left;
+}
+
+.formats-family h3 {
+  margin: 0 0 0.5rem;
+}
+
+.formats-family p {
+  margin: 0;
+  opacity: 0.8;
+  font-size: 0.875rem;
+}
+
+@media (min-width: 768px) {
+  .reassurance-list {
+    grid-template-columns: repeat(2, 1fr);
+  }
+  .formats-grid {
+    grid-template-columns: repeat(2, 1fr);
+  }
+}
+
+@media (min-width: 1024px) {
+  .formats-grid {
+    grid-template-columns: repeat(4, 1fr);
+  }
+}