feat: v0.11.0 VS Code-like explorer, markdown preview, search in files

- Explorer: context menus, multi-select, inline rename/new, drag to move
  or copy, desktop drag-and-drop uploads (folders too), cut/copy/paste,
  duplicate, download, delete to a 7-day trash with Undo. Server side in
  libexec/devdesk-fsops.sh with bats tests. Closes #54
- Markdown preview in a shadow root: headings with anchors and outline,
  highlighted code with copy, callouts, task lists, front matter, links
  that open files, live split view. Editor status bar, multi-cursor,
  closeBrackets, Ctrl+G, tab menus and reordering. Closes #55
- Search in files (Ctrl+Shift+F) via git grep / grep. Closes #56
- Fix: nested $(...) path checks now fail hard (set -e does not reach
  them; an escape created /x in testing); newest folder listing wins;
  sessionAction returns the reply JSON.

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01WHRLCCdXYm41Qx5kNhehaP

debian/changelog

@@ -1,3 +1,36 @@
+devdesk (0.11.0) bookworm; urgency=medium
+
+  * Explorer works like VS Code's (#54):
+    - Right-click menus for files, folders and empty space;
+      Ctrl/Shift+click selects several.
+    - Inline rename (F2) and inline new file/folder.
+    - Drag to move, Ctrl+drag to copy.
+    - Drop files or whole folders from the desktop to upload them, asking
+      Replace / Skip / Keep both on a clash.
+    - Cut/copy/paste files, duplicate, download, copy path, @Claude.
+    - Delete moves to a 7-day trash with Undo; nothing is overwritten
+      unless asked.
+    - Server side: new --fs-mkdir/-move/-copy/-delete/-restore/-put/
+      -download.
+  * Markdown preview rewritten (#55):
+    - GitHub-style headings with anchors and an outline.
+    - Highlighted code with Copy, callouts, task lists, front matter.
+    - Relative links open files in DevDesk.
+    - Split view with a live preview.
+  * Editor (#55): status bar (line/column, cursors, indentation, line
+    endings, language), multiple cursors, column select, auto-closing
+    brackets, Ctrl+G, and tab menus with drag-to-reorder.
+  * Search in files, Ctrl+Shift+F (#56): match case, whole word and regex,
+    via git grep or grep.
+  * Fixes:
+    - A nested path check could escape the session folder: set -e does not
+      reach into $(...).
+    - The tree could show a stale listing.
+    - Session actions now return the server's reply, so "Close split
+      panes" reports correctly.
+
+ -- Jared Vititoe <jjvititoe1@gmail.com>  Thu, 22 Oct 2026 21:30:00 -0400
+
 devdesk (0.10.4) bookworm; urgency=medium
 
   * The Sessions panel's list scrolls on its own (#53). There is no cap on