feat(ui): modern theme, dark/light toggle, polished templates

.vscode/settings.json

@@ -0,0 +1,9 @@
+{
+    "chatgpt.openOnStartup": true,
+    // Codex - OpenAI's coding agent: run without prompts in this workspace
+    "codex.approvalPolicy": "never",
+    // Filesystem access: use with care; consider "workspace-write" if you prefer safer mode
+    "codex.sandboxMode": "danger-full-access",
+    // Allow network calls (fetch deps/APIs)
+    "codex.networkAccess": "enabled"
+}