feat(web-ui): serve UXP (.ccx) plugin, remove legacy ZXP panel

Replaces the ZXP/CEP Premiere panel downloads with the UXP plugin:
- data.jsx PREMIERE_RELEASES → single UXP 2.2.2 entry (ccx pointer)
- home-page Premiere modal + Settings→Capture SDKs render the .ccx
  download and UXP install copy (UXP Developer Tool / Creative Cloud)
- add downloads/dragonflight-mam-2.2.2.ccx (built from premiere-plugin-uxp)
- remove the 1.0.0/1.0.1/1.1.0/1.2.0 .zxp + windows-setup.exe artifacts

Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>

services/web-ui/public/data.jsx

@@ -24,28 +24,17 @@ window.ZAMPP_API_PREFIX = API;  // single source of truth (#115)
 // Premiere panel releases embedded in this deployment. Bumping the version
 // here is the single source of truth - both the Editor download buttons and
 // the Settings → Capture SDKs page read from this list (#125).
+//
+// The panel is now a UXP plugin (.ccx), replacing the legacy CEP/ZXP panel.
+// Each entry carries a `ccx` URL; the older `zxp`/`installer` fields are gone.
 window.PREMIERE_RELEASES = [
   {
-    version: '1.2.0',
-    zxp:       '/downloads/dragonflight-premiere-panel-1.2.0.zxp',
+    version: '2.2.2',
+    ccx:       '/downloads/dragonflight-mam-2.2.2.ccx',
     installer: null,
-    notes: 'Latest: design system refresh, aligned panel UI with web-ui tokens',
+    notes: 'UXP plugin: one-click Export Timeline, library + conform + auto-relink, growing-file mount, runtime version chip. Replaces the legacy CEP/ZXP panel.',
     latest: true,
   },
-  {
-    version: '1.0.1',
-    zxp:       '/downloads/dragonflight-premiere-panel-1.0.1.zxp',
-    installer: '/downloads/dragonflight-premiere-panel-1.0.1-windows-setup.exe',
-    notes: 'Auto-relinking, growing-file support, batch trim',
-    latest: false,
-  },
-  {
-    version: '1.0.0',
-    zxp:       '/downloads/dragonflight-premiere-panel-1.0.0.zxp',
-    installer: '/downloads/dragonflight-premiere-panel-1.0.0-windows-setup.exe',
-    notes: 'Initial release',
-    latest: false,
-  },
 ];
 window.PREMIERE_LATEST = window.PREMIERE_RELEASES.find(r => r.latest) || window.PREMIERE_RELEASES[0];
 

services/web-ui/public/screens-admin.jsx

@@ -2015,9 +2015,9 @@ function SdkSettingsCard() {
           Premiere Pro Panel
         </div>
         <div style={{ fontSize: 12, color: 'var(--text-3)', lineHeight: 1.55, marginBottom: 10 }}>
-          The Dragonflight CEP panel enables growing-file editing, batch trim, and one-click hi-res relink directly inside Premiere Pro.
-          Install the <strong style={{ color: 'var(--text-2)' }}>.zxp</strong> via <a href="https://zxpsign.com/zxp-installer" target="_blank" rel="noreferrer" style={{ color: 'var(--accent)' }}>ZXP Installer</a> (Mac/Win),
-          or run the <strong style={{ color: 'var(--text-2)' }}>Windows Setup</strong> which bundles the installer automatically.
+          The Dragonflight UXP plugin enables growing-file editing, batch trim, and one-click hi-res relink directly inside Premiere Pro.
+          Install the <strong style={{ color: 'var(--text-2)' }}>.ccx</strong> via the <a href="https://developer.adobe.com/photoshop/uxp/2022/guides/devtool/installation/" target="_blank" rel="noreferrer" style={{ color: 'var(--accent)' }}>Adobe UXP Developer Tool</a>,
+          or double-click it with Creative Cloud installed.
         </div>
         <div style={{ display: 'flex', flexDirection: 'column', gap: 8 }}>
           {PREMIERE_RELEASES.map(r => (
@@ -2029,12 +2029,16 @@ function SdkSettingsCard() {
                 </div>
                 <div style={{ fontSize: 11.5, color: 'var(--text-3)', marginTop: 2 }}>{r.notes}</div>
               </div>
-              <a href={r.zxp} download style={{ textDecoration: 'none' }}>
-                <button className="btn ghost sm">ZXP</button>
+              {r.ccx && (
+                <a href={r.ccx} download style={{ textDecoration: 'none' }}>
+                  <button className="btn ghost sm">UXP (.ccx)</button>
                 </a>
+              )}
+              {r.installer && (
                 <a href={r.installer} download style={{ textDecoration: 'none' }}>
                   <button className="btn ghost sm">Win Installer</button>
                 </a>
+              )}
             </div>
           ))}
         </div>

services/web-ui/public/screens-home.jsx

@@ -264,7 +264,7 @@ function PremiereDownloadModal({ onClose }) {
           <div>
             <div style={{ fontSize: 15, fontWeight: 600 }}>Premiere panel</div>
             <div style={{ fontSize: 12, color: 'var(--text-3)', marginTop: 2 }}>
-              Adobe Premiere Pro integration. Install one ZXP per workstation.
+              Adobe Premiere Pro (UXP) integration. Install the .ccx per workstation via the Adobe UXP Developer Tool, or double-click it with Creative Cloud installed.
             </div>
           </div>
           <button className="icon-btn" aria-label="Close" onClick={onClose}><Icon name="x" /></button>
@@ -291,9 +291,9 @@ function PremiereDownloadModal({ onClose }) {
               </div>
               {rel.notes && <div className="premiere-release-notes">{rel.notes}</div>}
               <div className="premiere-release-actions">
-                {rel.zxp && (
-                  <a href={rel.zxp} download className="btn primary sm">
-                    <Icon name="download" />ZXP
+                {rel.ccx && (
+                  <a href={rel.ccx} download className="btn primary sm">
+                    <Icon name="download" />UXP plugin (.ccx)
                   </a>
                 )}
                 {rel.installer && (