feat(builder): unify StylePanel image fields on AssetPicker

Replace the ad-hoc upload/browse/URL blocks in ImageStylePanel, HeroStylePanel
(bgImage + bgVideo), BackgroundSectionStylePanel, NavStylePanel (standalone
Logo imageSrc + Navbar logoImage), MediaStylePanel (Gallery/ContentSlider
array items), and FeaturesEditor (per-feature image) with the shared
AssetPicker component, dropping each panel's duplicated local
showBrowser/browserAssets/handleUpload state and inline asset-browser JSX.

Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>

craft/src/panels/right/styles/NavStylePanel.tsx

@@ -16,6 +16,7 @@ import {
   smallInputStyle,
   sectionGap,
 } from './shared';
+import { AssetPicker } from '../../../ui/AssetPicker';
 
 /* ---------- NAV / MENU / LOGO ---------- */
 export const NavStylePanel: React.FC<StylePanelProps> = ({ selectedId, nodeProps }) => {
@@ -122,8 +123,8 @@ export const NavStylePanel: React.FC<StylePanelProps> = ({ selectedId, nodeProps
           {nodeProps.type === 'image' && (
             <>
               <div style={sectionGap}>
-                <label style={labelStyle}>Image URL</label>
-                <input type="text" value={nodeProps.imageSrc || ''} onChange={(e) => setProp('imageSrc', e.target.value)} placeholder="https://..." style={inputStyle} />
+                <label style={labelStyle}>Logo Image</label>
+                <AssetPicker value={nodeProps.imageSrc || ''} onChange={(url) => setProp('imageSrc', url)} variant="full" />
               </div>
               <div style={sectionGap}>
                 <label style={labelStyle}>Image Width</label>
@@ -147,8 +148,8 @@ export const NavStylePanel: React.FC<StylePanelProps> = ({ selectedId, nodeProps
           </div>
           {nodeProps.logoImage !== undefined && (
             <div style={sectionGap}>
-              <label style={labelStyle}>Logo Image URL</label>
-              <input type="text" value={nodeProps.logoImage || ''} onChange={(e) => setProp('logoImage', e.target.value)} placeholder="https://..." style={inputStyle} />
+              <label style={labelStyle}>Logo Image</label>
+              <AssetPicker value={nodeProps.logoImage || ''} onChange={(url) => setProp('logoImage', url)} variant="full" />
             </div>
           )}
           {nodeProps.logoUrl !== undefined && (