feat: Add post image headers to /assets/header/

- Add SVG icons for external sites
    - Add polished logo to login
    - Update front matter in <blog>.md files

src/components/LoginComponent.jsx

@@ -36,10 +36,10 @@ const LoginComponent = ({ onLogin }) => {
                 </div>
                 <div>
                     <Label htmlFor="password">Password: </Label>
-                    <Input style={{ border: '1px solid #edbd7d' }} type="password" id="password" value={password} onChange={(e) => setPassword(e.target.value)} autoComplete="current-password" />
+                    <Input style={{ border: '1px solid #edbd7d', marginBottom: '10px' }} type="password" id="password" value={password} onChange={(e) => setPassword(e.target.value)} autoComplete="current-password" />
                 </div>
                 
-                <Button look="flat" type="submit">Login</Button>
+                <Button look="flat" type="submit" style={{ padding: '0 20px' }}>Login</Button>
                 <div>
                     <NotificationGroup style={{ textAlign: 'center' }}>
                     {error && (<Notification type={{ style: 'error', icon: true }} closeable={true} onClose={() => setError('')}>

src/components/PanelBar.jsx

@@ -91,6 +91,7 @@ const CampfirePanelBar = ({ isExpanded = true }) => {
                         <span style={{ marginLeft: '8px' }}>{item.title}</span>
                     </div>
                 }
+                expanded={true}
             >
                 {item.items.map(renderItem)}
             </PanelBarItem>

src/components/UI/Copyright.jsx

@@ -10,7 +10,7 @@ export default function Copyright() {
       }}
     >
       <p>
-        &copy; Derek L. Seitz |{" "}
+        &copy; 2025{"  |  "}Derek L. Seitz{"  |  "}
         <a href="https://dlseitz.dev" target="_blank" rel="noopener noreferrer" class="k-link">
           dlseitz.dev
         </a>