chore: address coderabbit review nits

Keep migratedEnvelopePaths alphabetically ordered and label the ASCII
tree fences as text for markdownlint.

Author: Ren1104

lint/errscontract/rule_no_legacy_envelope_literal.go

@@ -25,6 +25,7 @@ var migratedEnvelopePaths = []string{
 	"shortcuts/doc/",
 	"shortcuts/drive/",
 	"shortcuts/event/",
+	"shortcuts/im/",
 	"shortcuts/mail/",
 	"shortcuts/markdown/",
 	"shortcuts/minutes/",
@@ -35,7 +36,6 @@ var migratedEnvelopePaths = []string{
 	"shortcuts/task/",
 	"shortcuts/vc/",
 	"shortcuts/whiteboard/",
-	"shortcuts/im/",
 }
 
 // legacyOutputImportPath is the import path of the package that declares the

skills/lark-vc/SKILL.md

@@ -145,7 +145,7 @@ lark-cli vc meeting get --params '{"meeting_id":"<meeting_id>","with_participant
 
 ## 资源关系
 
-```
+```text
 Meeting (视频会议)
 ├── Note (会议纪要) ← note_id 标识，note_display_type: normal / unified
 │   ├── MainDoc (AI 智能纪要文档, note_doc_token)

skills/lark-vc/references/vc-domain-boundaries.md

@@ -147,7 +147,7 @@ lark-cli note +transcript --note-id <note_id>
 
 ### 资源关系
 
-```
+```text
 Meeting
 ├── meeting_id
 ├── calendar_event_id  → meeting relation