ref: add isSnapshotProfileIdentifier guard; replace inline kind checks

Two inline `id.kind === "profile-snapshot"` checks in resolve/resolveType
become `isSnapshotProfileIdentifier(id)`, matching the style of every
other identifier guard in types.ts.

Biome --write also dropped a pre-existing redundant `!!canonicalUrl`
double-negation in profile.ts (already inside an `&&` chain).

Author: ryukzak

src/api/writer-generator/typescript/profile.ts

@@ -236,7 +236,7 @@ const generateProfileHelpersImport = (
     const canonicalUrl = snapshot.identifier.url;
 
     const imports: string[] = [];
-    if (snapshot.base.name === "Extension" && !!canonicalUrl && collectSubExtensionSlices(snapshot).length > 0)
+    if (snapshot.base.name === "Extension" && canonicalUrl && collectSubExtensionSlices(snapshot).length > 0)
         imports.push("isRawExtensionInput");
     if (canonicalUrl && hasMeta) imports.push("ensureProfile");
     if (sliceDefs.length > 0 || factoryInfo.sliceAutoFields.length > 0)

src/typeschema/types.ts

@@ -147,6 +147,10 @@ export const isProfileIdentifier = (id: TypeIdentifier | undefined): id is Profi
     return id?.kind === "profile";
 };
 
+export const isSnapshotProfileIdentifier = (id: TypeIdentifier | undefined): id is SnapshotProfileIdentifier => {
+    return id?.kind === "profile-snapshot";
+};
+
 export const isSpecializationIdentifier = (
     id: TypeIdentifier | undefined,
 ): id is ResourceIdentifier | ComplexTypeIdentifier | LogicalIdentifier => {

src/typeschema/utils.ts

@@ -23,6 +23,7 @@ import {
     isProfileTypeSchema,
     isResourceIdentifier,
     isResourceTypeSchema,
+    isSnapshotProfileIdentifier,
     isSnapshotProfileTypeSchema,
     isSpecializationTypeSchema,
     type LogicalTypeSchema,
@@ -371,12 +372,12 @@ export const mkTypeSchemaIndex = (
     populateTypeFamily(schemas);
 
     const resolve = (id: Identifier): TypeSchema | undefined => {
-        if (id.kind === "profile-snapshot") return snapshotIndex[id.url]?.[id.package];
+        if (isSnapshotProfileIdentifier(id)) return snapshotIndex[id.url]?.[id.package];
         return index[id.url]?.[id.package];
     };
     const resolveType = (id: TypeIdentifier): TypeSchema | NestedTypeSchema | undefined => {
         if (isNestedIdentifier(id)) return nestedIndex[id.url]?.[id.package];
-        if (id.kind === "profile-snapshot") return snapshotIndex[id.url]?.[id.package];
+        if (isSnapshotProfileIdentifier(id)) return snapshotIndex[id.url]?.[id.package];
         return index[id.url]?.[id.package];
     };