fix: editor native layout, UI polish, meme templates auth, pipeline export, install queuing

- Remove editor from AppLayout so it owns the full viewport with no sidebar/padding
- Add back-arrow in menu bar for navigation, restyle menu bar to match native app feel
- Slim left toolbar from 48px to 36px with smaller icons and subtler dividers
- Fix options bar overlapping canvas via shrink-0 and overflow-hidden
- Fix opacity/blend controls clipping in right panel with min-w-0 on flex children
- Add global range slider CSS for consistent thin-track + round-thumb styling
- Make meme template routes public so img tags can load without Bearer auth
- Show pipeline export buttons in default compact view, not just expanded hover
- Queue individual AI feature installs instead of erroring when one is active

apps/web/src/App.tsx

@@ -228,14 +228,7 @@ export function App() {
                 <Route path="/color-channels" element={<Navigate to="/adjust-colors" replace />} />
                 <Route path="/color-effects" element={<Navigate to="/adjust-colors" replace />} />
                 <Route path="/analytics-consent" element={<AnalyticsConsentPage />} />
-                <Route
-                  path="/editor"
-                  element={
-                    <AppLayout showToolPanel={false}>
-                      <EditorPage />
-                    </AppLayout>
-                  }
-                />
+                <Route path="/editor" element={<EditorPage />} />
                 <Route path="/:toolId" element={<ToolPage />} />
                 <Route path="/" element={<HomePage />} />
               </Routes>