Phase 3 complete: per-app backup toggles, restore, storage overview

- Storage overview on backup page (SSD/HDD bars, repo stats)
- Restic password visibility + hub sync for disaster recovery
- App data discovery (HDD bind mounts, Docker volumes)
- Per-app backup toggle checkboxes with settings persistence
- Dynamic backup paths: enabled app HDD data included in restic snapshots
- Limited app restore from snapshots (self-service recovery)
- Snapshots API endpoint for restore dropdown
- Version bump to 0.8.0

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

controller/internal/stacks/delete.go

@@ -81,7 +81,7 @@ func (m *Manager) DeleteStack(name string, removeHDDData bool) (*DeleteResponse,
 	}
 
 	// Step 1: Parse compose file for HDD bind mounts
-	hddMounts := parseComposeHDDMounts(stack.ComposePath, hddPath)
+	hddMounts := ParseComposeHDDMounts(stack.ComposePath, hddPath)
 
 	// Step 2: Run docker compose down --rmi local --volumes
 	env := m.stackEnv(stackDir)
@@ -164,7 +164,7 @@ func (m *Manager) GetStackHDDData(name string) (*HDDDataResponse, error) {
 		return resp, nil
 	}
 
-	mounts := parseComposeHDDMounts(stack.ComposePath, hddPath)
+	mounts := ParseComposeHDDMounts(stack.ComposePath, hddPath)
 	protected := protectedHDDPaths(hddPath)
 
 	for _, mount := range mounts {
@@ -197,9 +197,9 @@ func (m *Manager) GetStackHDDData(name string) (*HDDDataResponse, error) {
 	return resp, nil
 }
 
-// parseComposeHDDMounts reads a docker-compose.yml and extracts host paths
+// ParseComposeHDDMounts reads a docker-compose.yml and extracts host paths
 // that reference the HDD path from volume bind mounts.
-func parseComposeHDDMounts(composePath, hddPath string) []string {
+func ParseComposeHDDMounts(composePath, hddPath string) []string {
 	if hddPath == "" {
 		return nil
 	}