Step 162: add help panel and documentation

editor/tests/step162_test.cpp

@@ -0,0 +1,34 @@
+// Step 162 TDD Test: Help panel section parsing
+#include "HelpPanel.h"
+#include <iostream>
+
+static void expect(bool cond, const std::string& name, int& passed, int& failed) {
+    if (cond) {
+        std::cout << "Test " << (passed + failed + 1) << " PASS: " << name << "\n";
+        ++passed;
+    } else {
+        std::cout << "Test " << (passed + failed + 1) << " FAIL: " << name << "\n";
+        ++failed;
+    }
+}
+
+int main() {
+    int passed = 0;
+    int failed = 0;
+
+    std::string text =
+        "# Intro\n"
+        "Hello.\n"
+        "# Usage\n"
+        "Details.\n";
+    auto sections = parseHelpSections(text);
+    expect(sections.size() == 2, "section count", passed, failed);
+    expect(sections[0].title == "Intro", "first title", passed, failed);
+    expect(sections[1].title == "Usage", "second title", passed, failed);
+    expect(sections[0].content.find("Hello") != std::string::npos,
+           "content captured", passed, failed);
+
+    std::cout << "\n=== Step 162 Results: " << passed << " passed, "
+              << failed << " failed ===\n";
+    return failed == 0 ? 0 : 1;
+}