Merge #502: read-only XLSX spreadsheet preview in the file-preview overlay

# Conflicts: # CLAUDE.md
2026-10-10 01:09:43 +02:00 · 2026-10-09 05:48:05 +02:00
parent d7140c32b4 aad9c248dc
commit 0868286661
30 changed files with 5844 additions and 19 deletions
@@ -17,6 +17,7 @@ It renders what it can:
 | Markdown                 | Rendered by default: headings, tables, code blocks with copy buttons, images and links relative to the file (root-relative ones resolve from the workspace root, as on GitHub). Opened from an attachment card, where the file's folder is unknown, relative images show their alt text and relative links show as plain text. The MD pill in the header flips to source. |
 | Images                   | Inline.                                                                    |
 | Audio and video          | Inline with a working scrub bar, because range requests are supported.     |
+| Spreadsheets (`.xlsx`)   | Read-only grid, parsed in your browser (never on the server), up to 10 MB. `.xls` and `.ods` are download only. |
 | PDF and Office documents | Converted for preview when a converter is available.                       |
 | Anything else            | Download.                                                                  |