Fix various trivial problems (#36921)

* Fix #36915
* Fix #36919
* Close #36600
* Close #36601
* Fix incorrect oauth2 error message display

go.mod

@@ -37,6 +37,7 @@ require (
 	github.com/charmbracelet/git-lfs-transfer v0.1.1-0.20251013092601-6327009efd21
 	github.com/chi-middleware/proxy v1.1.1
 	github.com/dimiro1/reply v0.0.0-20200315094148-d0136a4c9e21
+	github.com/dlclark/regexp2 v1.11.5
 	github.com/dsnet/compress v0.0.2-0.20230904184137-39efe44ab707
 	github.com/dustin/go-humanize v1.0.1
 	github.com/editorconfig/editorconfig-core-go/v2 v2.6.4
@@ -183,7 +184,6 @@ require (
 	github.com/davecgh/go-spew v1.1.2-0.20180830191138-d8f796af33cc // indirect
 	github.com/davidmz/go-pageant v1.0.2 // indirect
 	github.com/dgryski/go-rendezvous v0.0.0-20200823014737-9f7001d12a5f // indirect
-	github.com/dlclark/regexp2 v1.11.5 // indirect
 	github.com/emersion/go-sasl v0.0.0-20241020182733-b788ff22d5a6 // indirect
 	github.com/fatih/color v1.18.0 // indirect
 	github.com/fxamacker/cbor/v2 v2.9.0 // indirect