chore: initialize git repo, add matplotlib dep, extend config

- Add .gitignore for Python/data/models
- Add matplotlib>=3.8.0 for eval plots
- Add PretrainConfig, FinetuneConfig, BalabitAdapterConfig, EvalConfig dataclasses

static/js/charts.js

@@ -0,0 +1,41 @@
+/**
+ * ECharts helpers: color palettes and create/dispose wrappers.
+ */
+
+export const TAB10_COLORS = [
+  '#38bdf8', '#22c55e', '#f59e0b', '#ec4899',
+  '#a78bfa', '#fb923c', '#34d399', '#f472b6',
+  '#60a5fa', '#fbbf24',
+]
+
+/**
+ * Map a speed value to a coolwarm hex colour.
+ * t in [0,1]: 0 = blue (fast), 1 = red (slow)
+ */
+export function coolwarmColor(t) {
+  const r = t < .5 ? Math.round(t * 2 * 140) : Math.round(140 + (t - .5) * 2 * 115)
+  const g = t < .5 ? Math.round(50 + t * 2 * 100) : Math.round(150 - (t - .5) * 2 * 150)
+  const b = t < .5 ? Math.round(200 - t * 2 * 100) : Math.round(100 - (t - .5) * 2 * 100)
+  return `#${r.toString(16).padStart(2, '0')}${g.toString(16).padStart(2, '0')}${b.toString(16).padStart(2, '0')}`
+}
+
+/**
+ * Create an ECharts instance on a container element.
+ * @param {HTMLElement} container
+ * @returns {object} ECharts instance
+ */
+export function createChart(container) {
+  return echarts.init(container, 'dark')
+}
+
+/**
+ * Dispose an ECharts instance on a container if one exists.
+ * @param {object|null} chartInstance - The echarts instance to dispose
+ * @returns {null}
+ */
+export function disposeChart(chartInstance) {
+  if (chartInstance) {
+    chartInstance.dispose()
+  }
+  return null
+}