fix: a credential store holds credentials of one kind, without a kind field in its entries, and the dialog edits several stores in tabs.

shared/credentials.ts

@@ -14,9 +14,11 @@ export type CredentialField = {
   secret: boolean
 }
 
-/** A kind of credential, such as a database connection or a service principal, with its fields. */
+/**
+ * The kind of the credentials of a store, such as a database connection or a service principal: a label for one
+ * credential and the fields of each. Every credential of a store is of its kind.
+ */
 export type CredentialKind = {
-  kind: string
   label: string
   fields: CredentialField[]
 }
@@ -29,13 +31,12 @@ export type CredentialKind = {
 export type CredentialProfile = {
   original: string | null
   name: string
-  kind: string
   values: Record<string, string>
   secrets: Record<string, string | null>
   stored: Record<string, boolean>
 }
 
-/** The read answer of a credential store and of a write: its credentials, kinds and the names it does not allow. */
+/** The read answer of a credential store and of a write: its credentials, its kind and the names it does not allow. */
 export type CredentialsDocument = {
   /** Identifies the content of config.json; a write sends it back and is refused with 409 when the file changed since. */
   version: string
@@ -44,6 +45,6 @@ export type CredentialsDocument = {
   path: string
   /** Whether ENCRYPTION_KEY or ENCRYPTION_KEY_FILE gives the server a key, which a secret needs. */
   encryption: boolean
-  kinds: CredentialKind[]
+  kind: CredentialKind
   reserved: string[]
 }