Add app icons, screenshots, and complete AppStream metainfo

- Add GNOME HIG-compliant app icon (scalable SVG) and symbolic variant
- Add 12 screenshots covering all major views and features
- Flesh out metainfo with screenshots, categories, URLs, content
  rating, system requirements, provides, translation, donation
  and contact links
- Update AppImage build script to bundle GTK plugin, symbolic
  icon, and metainfo
- Update meson.build with icon installation rules
- Remove About dialog from application menu
- Remove unused user guide and audit tool

data/app.driftwood.Driftwood.metainfo.xml

@@ -23,24 +23,105 @@
       <li>Duplicate detection and disk space analysis</li>
       <li>Firejail sandboxing support</li>
       <li>Orphaned configuration cleanup</li>
+      <li>Browse and install from the AppImageHub catalog</li>
     </ul>
   </description>
 
-  <launchable type="desktop-id">app.driftwood.Driftwood.desktop</launchable>
+  <icon type="stock">app.driftwood.Driftwood</icon>
 
-  <url type="homepage">https://github.com/driftwood-app/driftwood</url>
-  <url type="bugtracker">https://github.com/driftwood-app/driftwood/issues</url>
+  <launchable type="desktop-id">app.driftwood.Driftwood.desktop</launchable>
 
   <developer id="app.driftwood">
     <name>Driftwood Contributors</name>
   </developer>
 
+  <url type="homepage">https://git.lashman.live/lashman/driftwood</url>
+  <url type="bugtracker">https://git.lashman.live/lashman/driftwood/issues</url>
+  <url type="vcs-browser">https://git.lashman.live/lashman/driftwood</url>
+  <url type="donation">https://ko-fi.com/lashman</url>
+  <url type="contact">mailto:lashman@robotbrush.com</url>
+  <url type="contribute">https://git.lashman.live/lashman/driftwood</url>
+
+  <update_contact>lashman@robotbrush.com</update_contact>
+
   <branding>
     <color type="primary" scheme_preference="light">#8ff0a4</color>
     <color type="primary" scheme_preference="dark">#26a269</color>
   </branding>
 
-  <content_rating type="oars-1.1" />
+  <screenshots>
+    <screenshot type="default">
+      <caption>Library grid view showing installed AppImages</caption>
+      <image type="source" width="1151" height="864">https://git.lashman.live/lashman/driftwood/raw/branch/main/data/screenshots/02-library-grid.png</image>
+    </screenshot>
+    <screenshot>
+      <caption>Library list view with app details</caption>
+      <image type="source" width="1151" height="864">https://git.lashman.live/lashman/driftwood/raw/branch/main/data/screenshots/03-library-list.png</image>
+    </screenshot>
+    <screenshot>
+      <caption>App detail view with description and compatibility badges</caption>
+      <image type="source" width="1151" height="864">https://git.lashman.live/lashman/driftwood/raw/branch/main/data/screenshots/04-app-detail-about.png</image>
+    </screenshot>
+    <screenshot>
+      <caption>App screenshots, links, and update information</caption>
+      <image type="source" width="1151" height="864">https://git.lashman.live/lashman/driftwood/raw/branch/main/data/screenshots/05-app-detail-screenshots.png</image>
+    </screenshot>
+    <screenshot>
+      <caption>Desktop integration and file type management</caption>
+      <image type="source" width="1151" height="864">https://git.lashman.live/lashman/driftwood/raw/branch/main/data/screenshots/06-app-detail-integration.png</image>
+    </screenshot>
+    <screenshot>
+      <caption>System dashboard with FUSE, Wayland, and library status</caption>
+      <image type="source" width="1151" height="864">https://git.lashman.live/lashman/driftwood/raw/branch/main/data/screenshots/07-dashboard.png</image>
+    </screenshot>
+    <screenshot>
+      <caption>Preferences with scan locations and automation settings</caption>
+      <image type="source" width="1151" height="864">https://git.lashman.live/lashman/driftwood/raw/branch/main/data/screenshots/08-preferences.png</image>
+    </screenshot>
+    <screenshot>
+      <caption>Drag-and-drop to add AppImage files</caption>
+      <image type="source" width="1151" height="864">https://git.lashman.live/lashman/driftwood/raw/branch/main/data/screenshots/09-drag-and-drop.png</image>
+    </screenshot>
+    <screenshot>
+      <caption>App catalog with featured apps and category browsing</caption>
+      <image type="source" width="1151" height="864">https://git.lashman.live/lashman/driftwood/raw/branch/main/data/screenshots/10-catalog-browse.png</image>
+    </screenshot>
+    <screenshot>
+      <caption>Catalog app detail with install button and statistics</caption>
+      <image type="source" width="1151" height="864">https://git.lashman.live/lashman/driftwood/raw/branch/main/data/screenshots/11-catalog-app-detail.png</image>
+    </screenshot>
+    <screenshot>
+      <caption>Catalog category view with sorting and filtering</caption>
+      <image type="source" width="1151" height="864">https://git.lashman.live/lashman/driftwood/raw/branch/main/data/screenshots/12-catalog-category.png</image>
+    </screenshot>
+    <screenshot>
+      <caption>Catalog refresh with download progress</caption>
+      <image type="source" width="1151" height="864">https://git.lashman.live/lashman/driftwood/raw/branch/main/data/screenshots/01-catalog-loading.png</image>
+    </screenshot>
+  </screenshots>
+
+  <categories>
+    <category>System</category>
+    <category>PackageManager</category>
+    <category>GTK</category>
+  </categories>
+
+  <keywords>
+    <keyword>AppImage</keyword>
+    <keyword>Application</keyword>
+    <keyword>Manager</keyword>
+    <keyword>Package</keyword>
+    <keyword>FUSE</keyword>
+    <keyword>Wayland</keyword>
+    <keyword>Security</keyword>
+    <keyword>Sandbox</keyword>
+    <keyword>Catalog</keyword>
+    <keyword>Integration</keyword>
+  </keywords>
+
+  <content_rating type="oars-1.1">
+    <content_attribute id="social-info">mild</content_attribute>
+  </content_rating>
 
   <requires>
     <display_length compare="ge">360</display_length>
@@ -51,18 +132,18 @@
     <control>pointing</control>
   </recommends>
 
-  <keywords>
-    <keyword>AppImage</keyword>
-    <keyword>Application</keyword>
-    <keyword>Manager</keyword>
-    <keyword>Package</keyword>
-    <keyword>FUSE</keyword>
-    <keyword>Wayland</keyword>
-    <keyword>Security</keyword>
-  </keywords>
+  <supports>
+    <internet>first-run</internet>
+  </supports>
+
+  <provides>
+    <binary>driftwood</binary>
+  </provides>
+
+  <translation type="gettext">app.driftwood.Driftwood</translation>
 
   <releases>
-    <release version="0.1.0" date="2026-02-26">
+    <release version="0.1.0" date="2026-02-26" type="stable">
       <description>
         <p>Initial release of Driftwood with core features:</p>
         <ul>
@@ -75,6 +156,7 @@
           <li>Firejail sandbox support</li>
           <li>Orphan cleanup and disk reclamation wizard</li>
           <li>CLI interface with scan, list, launch, and inspect commands</li>
+          <li>AppImageHub catalog browsing and one-click install</li>
         </ul>
       </description>
     </release>

data/icons/hicolor/scalable/apps/app.driftwood.Driftwood.svg

@@ -0,0 +1,11 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<svg xmlns="http://www.w3.org/2000/svg" width="128" height="128" viewBox="0 0 128 128">
+  <!-- Chin/depth layer (GNOME Green 5) -->
+  <rect x="10" y="14" width="108" height="104" rx="24" fill="#26a269" />
+  <!-- Main face (GNOME Green 4) -->
+  <rect x="10" y="10" width="108" height="104" rx="24" fill="#2ec27e" />
+  <!-- Driftwood symbol -->
+  <g transform="translate(-8, -10) scale(1.44)">
+    <path fill="none" stroke="white" stroke-width="1.9" stroke-linecap="round" stroke-linejoin="round" stroke-miterlimit="10" d="M52.104,56.311c0-3.775,3.061-6.836,6.836-6.836c3.777,0,6.836,3.061,6.836,6.836 M62.293,55.785c0-1.652-1.34-2.99-2.994-2.99c-1.65,0-2.988,1.338-2.988,2.99 M48.948,56.311h19.983 M59.789,46.319l-13.996-1.577c-3.155-1.053-4.207-7.363-4.207-7.363l-3.154,2.104c0,0,2.103,4.207-1.053,4.207l-5.784-0.525c-3.194,0-5.784,2.59-5.784,5.785l23.137,7.361c0-5.519,4.474-9.991,9.991-9.991c5.52,0,9.992,4.473,9.992,9.991 M45.793,50l-6.311-3.154l-9.465-1.053 M35.276,48.949L39.482,50 M37.379,59.466l10.518,3.155h10.517 M74.189,56.311H80.5l-8.414-3.155 M64.725,59.466H53.156 M31.068,57.362l-6.31-2.104 M19.5,50l18.932,6.311" />
+  </g>
+</svg>

data/icons/hicolor/symbolic/apps/app.driftwood.Driftwood-symbolic.svg

@@ -0,0 +1,4 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<svg xmlns="http://www.w3.org/2000/svg" width="16" height="16" viewBox="15 33 70 34">
+  <path fill="none" stroke="#241f31" stroke-width="2" stroke-linecap="round" stroke-linejoin="round" stroke-miterlimit="10" d="M52.104,56.311c0-3.775,3.061-6.836,6.836-6.836c3.777,0,6.836,3.061,6.836,6.836 M62.293,55.785c0-1.652-1.34-2.99-2.994-2.99c-1.65,0-2.988,1.338-2.988,2.99 M48.948,56.311h19.983 M59.789,46.319l-13.996-1.577c-3.155-1.053-4.207-7.363-4.207-7.363l-3.154,2.104c0,0,2.103,4.207-1.053,4.207l-5.784-0.525c-3.194,0-5.784,2.59-5.784,5.785l23.137,7.361c0-5.519,4.474-9.991,9.991-9.991c5.52,0,9.992,4.473,9.992,9.991 M45.793,50l-6.311-3.154l-9.465-1.053 M35.276,48.949L39.482,50 M37.379,59.466l10.518,3.155h10.517 M74.189,56.311H80.5l-8.414-3.155 M64.725,59.466H53.156 M31.068,57.362l-6.31-2.104 M19.5,50l18.932,6.311" />
+</svg>