fix: register AppBarClusterBadge, fix CSI label mismatch, improve accessibility and theme support

- Register AppBarClusterBadge via registerAppBarAction (was dead code)
- Add Rook 1.12+ CSI pod labels to CephPodDetailSection alongside legacy labels
- Add sidebar entries for Storage Classes and Volumes pages
- Add role="dialog", aria-modal, aria-labelledby, and Escape key to all detail drawers
- Replace hardcoded hex colors with CSS custom properties for dark/light theme compat
- Remove duplicate parseStorageToBytes from OverviewPage (import from k8s.ts)
- Add endpoints field to CephObjectStoreStatus interface (remove unsafe cast)
- Use ROOK_CEPH_API_GROUP/VERSION constants in API URL construction
- Hoist extractJsonData to module level
- Remove dead extractPoolFromVolumeHandle function
- Fix redundant storageClasses.length guard in OverviewPage
- Fix lint indent warnings
- Update CLAUDE.md and CHANGELOG.md

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

src/components/BlockPoolsPage.tsx

@@ -17,6 +17,12 @@ import { useRookCephContext } from '../api/RookCephDataContext';
 function BlockPoolDetail({ pool, onClose }: { pool: CephBlockPool; onClose: () => void }) {
   return (
     <div
+      role="dialog"
+      aria-modal="true"
+      aria-labelledby="drawer-title-blockpool"
+      onKeyDown={e => {
+        if (e.key === 'Escape') onClose();
+      }}
       style={{
         position: 'fixed',
         top: 0,
@@ -38,7 +44,7 @@ function BlockPoolDetail({ pool, onClose }: { pool: CephBlockPool; onClose: () =
           marginBottom: '16px',
         }}
       >
-        <strong>{pool.metadata.name}</strong>
+        <strong id="drawer-title-blockpool">{pool.metadata.name}</strong>
         <button
           onClick={onClose}
           aria-label="Close"