Fix diffpatch API endpoint (#35610) (#35613)

Backport #35610 by @surya-purohit

Updates the swagger documentation for the `diffpatch` API endpoint.

The request body is corrected from the outdated `UpdateFileOptions` to
the current `ApplyDiffPatchOptions` to match the code implementation.

Closes [issue#35602](https://github.com/go-gitea/gitea/issues/35602)

---------

Co-authored-by: Surya Purohit <suryaprakash.sharma@sourcefuse.com>
Co-authored-by: wxiaoguang <wxiaoguang@gmail.com>
Co-authored-by: Lunny Xiao <xiaolunwen@gmail.com>

routers/api/v1/api.go

@@ -1423,6 +1423,7 @@ func Routes() *web.Router {
 					m.Get("/tags/{sha}", repo.GetAnnotatedTag)
 					m.Get("/notes/{sha}", repo.GetNote)
 				}, context.ReferencesGitRepo(true), reqRepoReader(unit.TypeCode))
+				m.Post("/diffpatch", mustEnableEditor, reqToken(), bind(api.ApplyDiffPatchFileOptions{}), repo.ReqChangeRepoFileOptionsAndCheck, repo.ApplyDiffPatch)
 				m.Group("/contents", func() {
 					m.Get("", repo.GetContentsList)
 					m.Get("/*", repo.GetContents)
@@ -1434,7 +1435,6 @@ func Routes() *web.Router {
 							m.Put("", bind(api.UpdateFileOptions{}), repo.ReqChangeRepoFileOptionsAndCheck, repo.UpdateFile)
 							m.Delete("", bind(api.DeleteFileOptions{}), repo.ReqChangeRepoFileOptionsAndCheck, repo.DeleteFile)
 						})
-						m.Post("/diffpatch", bind(api.ApplyDiffPatchFileOptions{}), repo.ReqChangeRepoFileOptionsAndCheck, repo.ApplyDiffPatch)
 					}, mustEnableEditor, reqToken())
 				}, reqRepoReader(unit.TypeCode), context.ReferencesGitRepo())
 				m.Group("/contents-ext", func() {

routers/api/v1/repo/patch.go

@@ -36,7 +36,7 @@ func ApplyDiffPatch(ctx *context.APIContext) {
 	//   in: body
 	//   required: true
 	//   schema:
-	//     "$ref": "#/definitions/UpdateFileOptions"
+	//     "$ref": "#/definitions/ApplyDiffPatchFileOptions"
 	// responses:
 	//   "200":
 	//     "$ref": "#/responses/FileResponse"

routers/api/v1/swagger/options.go

@@ -121,6 +121,9 @@ type swaggerParameterBodies struct {
 	// in:body
 	GetFilesOptions api.GetFilesOptions
 
+	// in:body
+	ApplyDiffPatchFileOptions api.ApplyDiffPatchFileOptions
+
 	// in:body
 	ChangeFilesOptions api.ChangeFilesOptions