feat(sub): add dynamic remark variables with Jalali date, transport, and status tokens (#5430)

* feat(sub): implement dynamic single-bracket remark variables with timezone-aware inline Jalali conversion

* Update .gitignore

* Update .gitignore

* merge: bring in origin/main commits to resolve conflict base

* fix(sub): address review issues in dynamic remark variables

- Add TIME_LEFT to unlimitedDropTokens so segments containing only
  {TIME_LEFT} are dropped for unlimited clients (same as DAYS_LEFT)
- Remove dead uiSingleBraceRe variable (translateUISingleBrackets uses
  a character scanner, not this regex)
- Change expireDateLabel to use time.Local instead of UTC, consistent
  with jalaliExpireDateLabel

Co-authored-by: Sanaei <MHSanaei@users.noreply.github.com>

* fix

* fix

---------

Co-authored-by: MHSanaei <MHSanaei@users.noreply.github.com>

internal/sub/service_test.go

@@ -35,7 +35,7 @@ func TestGenRemarkOmitsNodeName(t *testing.T) {
 		nodesByID: map[int]*model.Node{7: {Id: 7, Name: "Berlin", Address: "node7.example.com"}},
 	}
 	ib := &model.Inbound{Remark: "vless-tcp", NodeID: &nodeID}
-	if got := s.genRemark(ib, "", ""); got != "vless-tcp" {
+	if got := s.genRemark(ib, "", "", ""); got != "vless-tcp" {
 		t.Fatalf("remark = %q, want %q (node name must not leak into client-visible remarks)", got, "vless-tcp")
 	}
 }