Ensure that using Cmd + A in the search results only selects and copies the content of the currently opened file, not all files listed in the search results.
### Reproduction steps 1. Open a project in Zed 2. Search for a word using the global search 3. Click one of the files from the search results 4. Press `Cmd + A` (macOS) 5. Copy the selection ### Current vs. Expected behavior Current behavior: The clipboard contains the contents of all files listed in the search results, not just the active file. Expected behavior: `Cmd + A` should select only the contents of the currently selected file. ### Zed version and system specs Zed: v0.227.1+stable.199.9f9b707d39d62468d4cdaed2d8eb95a847da4cf9 (Zed) OS: macOS 26.3.1 Memory: 16 GiB Architecture: aarch64 ### Attach Zed log file <details><summary>Zed.log</summary> <!-- Paste your log inside the code block. --> ```log ``` </details> ### Relevant Zed settings <details><summary>settings.json</summary> <!-- Paste your settings inside the code block. --> ```json ``` </details> ### Relevant Keymap <details><summary>keymap.json</summary> <!-- Paste your keymap file inside the code b