ENG-2112 Add sort button with sort dropdown

apps/obsidian/src/components/NodeSearchFooter.tsx

@@ -0,0 +1,74 @@
+import { type ReactElement } from "react";
+import { getHintKeys, type HintKey } from "~/utils/keyboardHints";
+
+type NodeSearchFooterProps = {
+  canAct: boolean;
+  onClose: () => void;
+  onOpenInNewTab: () => void;
+  onOpenInSplit: () => void;
+};
+
+type FooterActionProps = {
+  disabled?: boolean;
+  keys: HintKey[];
+  label: string;
+  onClick: () => void;
+};
+
+const KeyHints = ({ keys }: { keys: HintKey[] }): ReactElement => (
+  <>
+    {getHintKeys(keys).map((symbol) => (
+      <kbd className="dg-search-footer-key" key={symbol}>
+        {symbol}
+      </kbd>
+    ))}
+  </>
+);
+
+const FooterAction = ({
+  disabled = false,
+  keys,
+  label,
+  onClick,
+}: FooterActionProps): ReactElement => (
+  <button
+    type="button"
+    className="prompt-instruction dg-search-footer-action inline-flex h-auto cursor-pointer items-center gap-1 rounded-none border-0 p-0 disabled:cursor-not-allowed disabled:opacity-50"
+    disabled={disabled}
+    onClick={onClick}
+    // Clicking must not move focus out of the query input, or the arrow keys stop
+    // reaching the result list.
+    onMouseDown={(event) => event.preventDefault()}
+  >
+    <KeyHints keys={keys} />
+    <span className="ms-1">{label}</span>
+  </button>
+);
+
+// Sits in Obsidian's `prompt-instructions` container for its type and spacing.
+// Obsidian centres that row for the narrow quick switcher; this footer spans a
+// full-width result list, so the actions start at its left edge instead.
+export const NodeSearchFooter = ({
+  canAct,
+  onClose,
+  onOpenInNewTab,
+  onOpenInSplit,
+}: NodeSearchFooterProps): ReactElement => (
+  <div className="prompt-instructions dg-search-footer shrink-0 justify-start px-0 pb-0 text-left">
+    <FooterAction
+      disabled={!canAct}
+      keys={["Enter"]}
+      label="open in new tab"
+      onClick={onOpenInNewTab}
+    />
+    <FooterAction
+      disabled={!canAct}
+      keys={["Shift", "Enter"]}
+      label="open in split"
+      onClick={onOpenInSplit}
+    />
+    {/* The Escape key itself is handled by Obsidian's modal scope; this button
+        is the pointer equivalent, so every footer item responds to a click. */}
+    <FooterAction keys={["Escape"]} label="close" onClick={onClose} />
+  </div>
+);