phase 1: scaffold D3/TopoJSON migration structure

- Extract country prison data to assets/data/countries.js (ES module)
- Add ISO numeric→alpha-3 lookup table for TopoJSON ID bridging
- Download world-atlas countries-110m.json (TopoJSON, 108KB)
- Create stub ES modules for map, charts, and UI layers
- Replace ZingChart/jQuery script tags with single ES module entry point
- Preserve original app.js as _app.js.bak for Phase 2+ reference

1 files changed, 3 insertions, 0 deletions

diff --git a/assets/js/ui/controls.js b/assets/js/ui/controls.js
new file mode 100644
index 0000000..15c1a3b
--- /dev/null
+++ b/assets/js/ui/controls.js
@@ -0,0 +1,3 @@
+// Phase 5: metric selector, label toggle, reset button bindings
+export function initControls(onMetricChange, onLabelToggle, onReset) {}
+export function getTop5(countries, metricKey) {}