[Repo Assist] Improve search UX: auto-focus, consistent close, Ctrl+K shortcut (#1084)

* Improve search UX: auto-focus, consistent close, Ctrl+K shortcut

- openSearch() focuses the search input immediately after showModal()
- closeSearch() resets the input value and clears results on every close path
  (backdrop click, Escape, or future programmatic close), making behaviour
  consistent regardless of how the dialog was dismissed
- Keyboard shortcut: Ctrl+K / Cmd+K (in addition to '/') now opens search,
  matching the convention used by GitHub, MDN, and many modern doc sites
- The '/' shortcut is now suppressed when the user is typing in an INPUT or
  TEXTAREA to avoid accidentally opening search mid-sentence
- Escape handling moved from keyup to keydown so ev.preventDefault() reliably
  stops the browser's built-in dialog-close before our custom close logic runs

Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>

* ci: trigger checks

---------

Co-authored-by: github-actions[bot] <github-actions[bot]@users.noreply.github.com>
Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>

Author: github-actions[bot]

RELEASE_NOTES.md

@@ -3,6 +3,7 @@
 ## [Unreleased]
 
 ### Added
+* Search dialog now auto-focuses the search input when opened, clears on close, and can be triggered with `Ctrl+K` / `Cmd+K` in addition to `/`.
 * Add `dotnet fsdocs convert` command to convert a single `.md`, `.fsx`, or `.ipynb` file to HTML (or another output format) without building a full documentation site. [#811](https://github.com/fsprojects/FSharp.Formatting/issues/811)
 * `fsdocs convert` now accepts the input file as a positional argument (e.g. `fsdocs convert notebook.ipynb -o notebook.html`). [#1019](https://github.com/fsprojects/FSharp.Formatting/pull/1019)
 * `fsdocs convert` infers the output format from the output file extension when `--outputformat` is not specified (e.g. `-o out.md` implies `--outputformat markdown`). [#1019](https://github.com/fsprojects/FSharp.Formatting/pull/1019)

docs/content/fsdocs-search.js

@@ -51,14 +51,23 @@ if (root && searchBtn) {
     const resultsElement = document.querySelector("dialog ul");
     const searchBox = document.querySelector("dialog input[type=search]");
 
-    searchBtn.addEventListener("click", () => {
+    function openSearch() {
         searchDialog.showModal();
-    })
+        searchBox.focus();
+    }
+
+    function closeSearch() {
+        searchBox.value = '';
+        empty.textContent = "Type something to start searching.";
+        clearResults();
+        searchDialog.close();
+    }
+
+    searchBtn.addEventListener("click", openSearch)
 
     searchDialog.addEventListener("click", ev => {
         if (ev.target.tagName === "DIALOG") {
-            searchBox.value = '';
-            searchDialog.close()
+            closeSearch();
         }
     })
 
@@ -112,13 +121,21 @@ if (root && searchBtn) {
         }
     });
 
-    window.addEventListener('keyup', ev => {
+    window.addEventListener('keydown', ev => {
         if (ev.key === 'Escape' && searchDialog.open) {
-            searchDialog.close();
+            ev.preventDefault();
+            closeSearch();
         }
 
-        if (ev.key === '/' && !searchDialog.open) {
-            searchDialog.showModal();
+        const focusedTag = document.activeElement?.tagName;
+        const isTypingInInput = focusedTag === 'INPUT' || focusedTag === 'TEXTAREA';
+        const isShortcut =
+            (ev.key === '/' && !isTypingInInput) ||
+            (ev.key === 'k' && (ev.ctrlKey || ev.metaKey));
+
+        if (isShortcut && !searchDialog.open) {
+            ev.preventDefault();
+            openSearch();
         }
     })
 } else {