feat: Docker volume backup, Tier 2 restore, restore dropdown fixes (v0.33.0)

- Add Docker named volume backup to Tier 1 (dump to tar, include in restic)
  and Tier 2 (copy tars to rsync mirror _volumes/ dir)
- Fix volume name resolution: use project-prefixed names (mealie_mealie_data)
- Fix double Tier 1 in restore dropdown: filter snapshots by app's home drive
- Add Tier 2 restore: RestoreAppFromTier2() restores from rsync mirror
- Show Tier 2 entry in restore dropdown when cross-drive backup succeeded
- Add .fab import link in restore section
- Volume-aware restore type banners and backup content labels

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

controller/internal/backup/appdata.go

@@ -6,6 +6,7 @@ import (
 	"log"
 	"os"
 	"os/exec"
+	"path/filepath"
 	"strings"
 	"time"
 
@@ -17,7 +18,8 @@ type StackDataProvider interface {
 	GetStackComposePath(name string) (composePath string, ok bool)
 	ListDeployedStacks() []StackSummary
 	GetStackHDDMounts(name string) []string
-	GetStackHDDPath(name string) string // raw HDD_PATH from app.yaml (empty if no HDD)
+	GetStackHDDPath(name string) string   // raw HDD_PATH from app.yaml (empty if no HDD)
+	GetDockerVolumes(name string) []string // full Docker volume names (project-prefixed)
 	StopStack(name string) error
 	StartStack(name string) error
 }
@@ -28,6 +30,7 @@ type StackSummary struct {
 	DisplayName string
 	ComposePath string
 	NeedsHDD    bool
+	HasVolumes  bool
 }
 
 // AppBackupInfo holds backup-relevant data paths for a deployed app.
@@ -42,6 +45,7 @@ type AppBackupInfo struct {
 	BackupEnabled bool
 	HasHDDData    bool
 	HasDBDump     bool
+	HasVolumeData bool
 	StorageLabel  string // resolved from registered storage paths
 }
 
@@ -91,6 +95,7 @@ func DiscoverAppData(provider StackDataProvider, discoveredDBs []DiscoveredDB) [
 
 		// Discover Docker named volumes from compose
 		info.DockerVolumes = ParseComposeNamedVolumes(stack.ComposePath)
+		info.HasVolumeData = len(info.DockerVolumes) > 0
 
 		// Check if app has a DB container (already backed up via DB dump)
 		for _, db := range discoveredDBs {
@@ -137,6 +142,21 @@ func ParseComposeNamedVolumes(composePath string) []AppDockerVolume {
 	return volumes
 }
 
+// ResolveDockerVolumeNames returns full Docker volume names with the compose project prefix.
+// Docker Compose V2 creates volumes as <project>_<volumeName> where project = directory name.
+func ResolveDockerVolumeNames(composePath string) []string {
+	vols := ParseComposeNamedVolumes(composePath)
+	if len(vols) == 0 {
+		return nil
+	}
+	project := filepath.Base(filepath.Dir(composePath))
+	names := make([]string, 0, len(vols))
+	for _, v := range vols {
+		names = append(names, project+"_"+v.Name)
+	}
+	return names
+}
+
 // appDirSize returns the total byte count and a human-readable string for a directory.
 // H2/H3: Single du invocation with 30s timeout replaces two separate calls.
 func appDirSize(path string) (int64, string) {