Add new templates and tests for improved functionality

- Created index.html template for the homepage with service cards and partner logos.
- Added page_from_md.html template for rendering pages from markdown.
- Developed services.html template detailing various services offered.
- Implemented tests for link handling in markdown, ensuring external links open in new tabs and internal links function correctly.
- Enhanced markdown parser tests to validate heading extraction, content rendering, and link safety.
- Introduced utility tests for template rendering, HTML minification, and JavaScript minification.

Co-authored-by: Copilot <copilot@github.com>

tests/test_utils.py

@@ -0,0 +1,101 @@
+import os
+from pathlib import Path
+
+import pytest
+
+from lib.utils import (
+    get_template_files,
+    render_template,
+    set_active_page_by_url,
+    minify_html,
+    js_minifier,
+)
+
+
+def test_get_template_files_filters_partials_and_non_html(
+        tmp_path: Path) -> None:
+    template_dir = tmp_path / "templates"
+    template_dir.mkdir()
+    (template_dir / "page.html").write_text("<h1>Page</h1>", encoding="utf-8")
+    (template_dir / "_partial.html").write_text("<p>Ignore</p>", encoding="utf-8")
+    (template_dir / "notes.txt").write_text("ignore", encoding="utf-8")
+
+    result = get_template_files(str(template_dir))
+
+    assert sorted(result) == ["page.html"]
+
+
+def test_render_template_renders_with_context(tmp_path: Path) -> None:
+    template_dir = tmp_path / "templates"
+    template_dir.mkdir()
+    (template_dir /
+     "hello.html").write_text("Hello {{ name }}!", encoding="utf-8")
+
+    rendered = render_template(
+        "hello.html", {
+            "name": "World"}, template_dir=str(template_dir))
+
+    assert rendered == "Hello World!"
+
+
+def test_set_active_page_by_url_marks_only_requested_page_active() -> None:
+    nav = {
+        "index.html": {"active": False},
+        "about.html": {"active": False},
+    }
+
+    set_active_page_by_url(nav, "about.html")
+
+    assert nav["about.html"]["active"] is True
+    assert nav["index.html"]["active"] is False
+
+
+def test_minify_html_removes_comments_and_extra_whitespace() -> None:
+    html = "<div>   Text </div> <!-- comment -->\n"
+
+    minified = minify_html(html)
+
+    assert minified == "<div> Text</div>"
+
+
+def test_js_minifier_strips_comments_and_rewrites_files(
+        tmp_path: Path) -> None:
+    output_dir = tmp_path / "site"
+    js_dir = output_dir / "js"
+    js_dir.mkdir(parents=True)
+    js_path = js_dir / "app.js"
+    js_path.write_text(
+        "// comment\nvar x = 1;  \n/* block */\nfunction test() { console.log(x); }\n",
+        encoding="utf-8",
+    )
+    # Ensure non-JS files are ignored
+    (js_dir / "readme.txt").write_text("skip", encoding="utf-8")
+
+    js_minifier(str(output_dir))
+
+    content = js_path.read_text(encoding="utf-8")
+
+    assert content == "var x = 1; function test() { console.log(x); }"
+    assert os.path.exists(js_dir / "readme.txt")
+
+
+@pytest.mark.parametrize(
+    "initial, expected",
+    [
+        ({"a.js": "const a = 1;"}, "const a = 1;"),
+    ],
+)
+def test_js_minifier_handles_multiple_invocations(
+        tmp_path: Path, initial, expected) -> None:
+    output_dir = tmp_path / "dist"
+    js_dir = output_dir / "js"
+    js_dir.mkdir(parents=True)
+    for filename, content in initial.items():
+        (js_dir / filename).write_text(content, encoding="utf-8")
+
+    js_minifier(str(output_dir))
+    js_minifier(str(output_dir))
+
+    for filename in initial:
+        content = (js_dir / filename).read_text(encoding="utf-8")
+        assert content == expected