TypeScript: stop ignoring source directories named coverage

Both TypeScript language servers hard-ignored any directory named
`coverage` in `is_ignored_dirname`, intending to skip coverage-report
output but matching by bare dirname — which also hid legitimate source
directories named `coverage` (e.g. `src/routes/coverage/`) from symbol
tools. Generated report dirs are already covered by gitignore, so the
hardcoded entry is removed.

Adds a regression test asserting `coverage`/`src`/`lib`/`routes` are not
ignored while `node_modules`/`dist`/`build`/`.git` still are.

Fixes #1523.

test/solidlsp/typescript/test_typescript_ignored_dirs.py

@@ -0,0 +1,35 @@
+"""
+Tests for TypeScript language server directory-ignoring behavior.
+
+Regression test for the case where a *source* directory named `coverage`
+(e.g. `src/routes/coverage/`) was hard-ignored by `is_ignored_dirname`,
+hiding it from symbol tools. Only generated coverage-report dirs should be
+excluded, and those are handled by gitignore.
+"""
+
+import pytest
+
+from solidlsp import SolidLanguageServer
+from solidlsp.ls_config import Language
+
+pytestmark = pytest.mark.typescript
+
+
+@pytest.mark.parametrize("language_server", [Language.TYPESCRIPT], indirect=True)
+class TestTypescriptIgnoredDirectories:
+    """TypeScript-specific directory ignoring behavior."""
+
+    def test_generated_dirs_still_ignored(self, language_server: SolidLanguageServer) -> None:
+        assert language_server.is_ignored_dirname("node_modules"), "node_modules should be ignored"
+        assert language_server.is_ignored_dirname("dist"), "dist should be ignored"
+        assert language_server.is_ignored_dirname("build"), "build should be ignored"
+        # VCS dir handled by the base class
+        assert language_server.is_ignored_dirname(".git"), ".git should be ignored"
+
+    def test_source_dirs_not_ignored(self, language_server: SolidLanguageServer) -> None:
+        # `coverage` is a legitimate source/module name; only generated
+        # coverage-report dirs (which are gitignored) should be excluded.
+        assert not language_server.is_ignored_dirname("coverage"), "coverage source dir should not be ignored"
+        assert not language_server.is_ignored_dirname("src"), "src should not be ignored"
+        assert not language_server.is_ignored_dirname("lib"), "lib should not be ignored"
+        assert not language_server.is_ignored_dirname("routes"), "routes should not be ignored"