feat: add collection pattern to delete empty volumes (#10129)

* feat: add collection pattern to delete empty volumes

Co-authored-by: Codex <noreply@openai.com>

* shell: match collection pattern with wildcard matcher

Use wildcard.MatchesWildcard in the shared collection-pattern helper,
matching command_volume_fix_replication's matchCollectionPattern. The
flag only advertises '*' and '?', which is exactly what the matcher
supports.

---------

Co-authored-by: Codex <noreply@openai.com>
Co-authored-by: Chris Lu <chris.lu@gmail.com>

weed/shell/command_volume_delete_empty_test.go

@@ -0,0 +1,41 @@
+package shell
+
+import (
+	"testing"
+
+	"github.com/seaweedfs/seaweedfs/weed/pb/master_pb"
+)
+
+func TestIsEmptyVolumeDeleteCandidateCollectionPattern(t *testing.T) {
+	now := int64(1000)
+	quietSeconds := int64(100)
+	quietEmptyVolume := &master_pb.VolumeInformationMessage{
+		Size:             0,
+		ModifiedAtSecond: now - quietSeconds - 1,
+		Collection:       "important-logs",
+	}
+
+	tests := []struct {
+		name       string
+		pattern    string
+		collection string
+		want       bool
+	}{
+		{name: "empty pattern matches named collection", pattern: "", collection: "important-logs", want: true},
+		{name: "wildcard matches collection", pattern: "important*", collection: "important-logs", want: true},
+		{name: "wildcard rejects collection", pattern: "important*", collection: "other-logs", want: false},
+		{name: "default pattern matches empty collection", pattern: CollectionDefault, collection: "", want: true},
+		{name: "default pattern rejects named collection", pattern: CollectionDefault, collection: "important-logs", want: false},
+	}
+
+	for _, tt := range tests {
+		t.Run(tt.name, func(t *testing.T) {
+			v := *quietEmptyVolume
+			v.Collection = tt.collection
+			if got := isEmptyVolumeDeleteCandidate(&v, quietSeconds, now, tt.pattern); got != tt.want {
+				t.Fatalf("isEmptyVolumeDeleteCandidate(collection=%q, pattern=%q) = %v, want %v",
+					tt.collection, tt.pattern, got, tt.want)
+			}
+		})
+	}
+}