fix(tui): highlight shell script files (#44772)

packages/tui/src/util/filetype.ts

@@ -89,10 +89,10 @@ export const LANGUAGE_EXTENSIONS: Record<string, string> = {
   ".sass": "sass",
   ".scala": "scala",
   ".shader": "shaderlab",
-  ".sh": "shellscript",
-  ".bash": "shellscript",
-  ".zsh": "shellscript",
-  ".ksh": "shellscript",
+  ".sh": "bash",
+  ".bash": "bash",
+  ".zsh": "bash",
+  ".ksh": "bash",
   ".sql": "sql",
   ".svelte": "svelte",
   ".swift": "swift",

packages/tui/test/util/filetype.test.ts

@@ -1,4 +1,5 @@
 import { describe, expect, test } from "bun:test"
+import parsers from "../../src/parsers-config"
 import { filetype } from "../../src/util/filetype"
 
 describe("util.filetype", () => {
@@ -9,6 +10,12 @@ describe("util.filetype", () => {
     expect(filetype("README.unknown")).toBeUndefined()
   })
 
+  test("maps shell filenames to the registered bash parser", () => {
+    const languages = ["script.sh", "script.bash", "script.zsh", "script.ksh"].map(filetype)
+    expect(languages).toEqual(["bash", "bash", "bash", "bash"])
+    expect(parsers.parsers.some((parser) => languages.every((language) => language === parser.filetype))).toBe(true)
+  })
+
   test("uses none for missing filenames", () => {
     expect(filetype()).toBe("none")
     expect(filetype("")).toBe("none")