Step 107c: persist editor mode in recent files

editor/tests/step107c_test.cpp

@@ -0,0 +1,32 @@
+// Step 107c TDD Test: Recent file mode persistence
+//
+// Tests:
+// 1. Recent files store mode string
+// 2. Re-adding updates mode
+
+#include <cassert>
+#include <iostream>
+#include "WelcomeScreen.h"
+
+int main() {
+    int passed = 0;
+    int failed = 0;
+
+    WelcomeScreen welcome;
+    welcome.addRecentFile("/tmp/a.py", "python", "text");
+    auto recents = welcome.getRecentFiles();
+    assert(recents.size() == 1);
+    assert(recents[0].mode == "text");
+    std::cout << "Test 1 PASS: mode stored" << std::endl;
+    ++passed;
+
+    welcome.addRecentFile("/tmp/a.py", "python", "structured");
+    recents = welcome.getRecentFiles();
+    assert(recents.size() == 1);
+    assert(recents[0].mode == "structured");
+    std::cout << "Test 2 PASS: mode updated" << std::endl;
+    ++passed;
+
+    std::cout << "\n=== Step 107c Results: " << passed << " passed, " << failed << " failed ===" << std::endl;
+    return failed > 0 ? 1 : 0;
+}