feat: add script version history (#3085)

* feat: add script version history

* fix: validate canonical save-as paths before backup

* fix: stack script history footer on small screens

src/pages/script/historyDrawer.module.less

@@ -0,0 +1,48 @@
+.footer {
+  display: flex;
+  align-items: center;
+  justify-content: space-between;
+  gap: 16px;
+  :global(.ant-typography) {
+    min-width: 0;
+    overflow-wrap: anywhere;
+  }
+  :global(.ant-btn) {
+    flex-shrink: 0;
+  }
+}
+.labels {
+  display: grid;
+  grid-template-columns: 1fr 1fr;
+  gap: 24px;
+  font-weight: 500;
+}
+.diff {
+  flex: 1;
+  min-height: 260px;
+  overflow: auto;
+  border: 1px solid var(--ant-border-color-split, #d9d9d9);
+}
+@media (max-width: 600px) {
+  .footer {
+    flex-direction: column;
+    align-items: stretch;
+    gap: 8px;
+    :global(.ant-btn) {
+      width: 100%;
+      height: auto;
+      min-height: 32px;
+      white-space: normal;
+      overflow-wrap: anywhere;
+    }
+  }
+  .labels {
+    gap: 8px;
+    font-size: 12px;
+  }
+  .diff {
+    flex: none;
+    min-height: 200px;
+    border: 0;
+  }
+}