controller v0.49.0: slice 10 P2 activation — pending-drive detection + restart button

pendingActivationDrives() flags registered drives the agent shows attached but not
live-mounted in the container; settings banner + "Újraindítás most" button →
/api/storage/activate → agentapi.GuestReboot. Batches all pending into one restart.

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

CHANGELOG.md

@@ -1,5 +1,18 @@
 ## Changelog
 
+### v0.49.0 — slice 10 P2 activation: pending-drive detection + "Újraindítás most" (2026-06-12)
+
+A drive enrolled into a running guest activates only at the next guest boot (the host-side live inject
+is blocked on unprivileged LXC — see felhom-agent v0.26.0). Per the decision: enroll persists (no forced
+reboot), and the customer activates pending drives with one batched restart.
+
+- **Pending detection** (`pendingActivationDrives`): a registered StoragePath whose backing drive the
+  agent reports present+attached but which is NOT a live mount in this container → "pending activation".
+- **Settings UI:** a banner ("N meghajtó aktiválásra vár") with an **"Újraindítás most (~30 mp)"** button
+  (one restart batches all pending drives). `POST /api/storage/activate` → `agentapi.GuestReboot` →
+  agent `POST /guest/reboot`. The reboot takes the controller down too, so the JS reloads after the
+  restart window rather than awaiting the (cut-short) response.
+
 ### v0.48.0 — slice 10 P2C: enroll passes the drive into the guest (passthrough) (2026-06-12)
 
 Pairs with felhom-agent v0.25.0 (`POST /disks/guest-attach`) + the golden's `/mnt:rslave` controller