fix(languages): add .mts/.cts extensions and *.spec.tsx test glob to the TypeScript config

The TypeScript LanguageConfig omitted the first-class .mts/.cts module
extensions, so those files resolved to null and were skipped by the
tree-sitter pipeline. It also listed *.test.tsx but not *.spec.tsx,
miscategorizing spec-named TSX test files as regular source.

Add .mts/.cts to extensions and *.spec.tsx to the test glob, mirroring
the JavaScript config's .mjs/.cjs and test/spec parity.

Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>

Author: tirth8205

understand-anything-plugin/packages/core/src/__tests__/language-registry.test.ts

@@ -72,6 +72,9 @@ describe("LanguageRegistry", () => {
       expect(registry.getByExtension(".h")?.id).toBe("c");
       expect(registry.getByExtension(".lua")?.id).toBe("lua");
       expect(registry.getByExtension(".js")?.id).toBe("javascript");
+      expect(registry.getByExtension(".mts")?.id).toBe("typescript");
+      expect(registry.getByExtension(".cts")?.id).toBe("typescript");
+      expect(registry.getForFile("src/server.mts")?.id).toBe("typescript");
     });
 
     it("has no duplicate extension mappings across configs", () => {
@@ -93,6 +96,13 @@ describe("LanguageRegistry", () => {
     });
   });
 
+  describe("typescript config test patterns", () => {
+    it("recognizes both .test.tsx and .spec.tsx test files", () => {
+      expect(typescriptConfig.filePatterns.tests).toContain("*.test.tsx");
+      expect(typescriptConfig.filePatterns.tests).toContain("*.spec.tsx");
+    });
+  });
+
   describe("Non-code language configs", () => {
     it("detects all non-code file types via extension", () => {
       const registry = LanguageRegistry.createDefault();

understand-anything-plugin/packages/core/src/languages/configs/typescript.ts

@@ -3,7 +3,7 @@ import type { LanguageConfig } from "../types.js";
 export const typescriptConfig = {
   id: "typescript",
   displayName: "TypeScript",
-  extensions: [".ts", ".tsx"],
+  extensions: [".ts", ".tsx", ".mts", ".cts"],
   treeSitter: {
     wasmPackage: "tree-sitter-typescript",
     wasmFile: "tree-sitter-typescript.wasm",
@@ -24,7 +24,7 @@ export const typescriptConfig = {
   filePatterns: {
     entryPoints: ["src/index.ts", "src/main.ts", "src/App.tsx", "index.ts"],
     barrels: ["index.ts"],
-    tests: ["*.test.ts", "*.spec.ts", "*.test.tsx"],
+    tests: ["*.test.ts", "*.spec.ts", "*.test.tsx", "*.spec.tsx"],
     config: ["tsconfig.json"],
   },
 } satisfies LanguageConfig;