v2.81.0

Self-hosted ZenNotes server 2.81.0 with the pinned browser artifact web-2.81.0-web.h7628547a4b0d2d18 (built from ZenNotes/zennotes bfab9fdc, the v2.81.0 release commit).

What changed for self-hosters, all in the browser app the server hands out:

• Recurring tasks. @repeat:weekly (or daily, weekdays, monthly, 2d, mon/thu, after-3d and more) on a task brings the next one back when you check it off, with its subtasks unticked; the finished line stays below as the record. @remind: is kept in the note and shown with a bell; the desktop app is what delivers reminders, so the web app has no reminder settings.
• New Kanban for a folder. A folder's menu, the palette and :kanban make a database that opens on its Board with To do, Doing and Done, and the Board now has a full keyboard.
• Colors for Kanban columns, from the column's menu, C or :color.
• Folder fields you pick from. Every Settings field that names a folder lists the vault's folders as you type.
• Fixes: Enter in a list keeps its bullets together and ending a list leaves a blank line; Back from a note opened from Tasks returns to Tasks; a database deleted from another device closes its tab instead of erroring; a database opened in the same pane starts at its first column; a tap on a touch screen no longer leaves a highlight behind.

No Go changes: vendorHash is unchanged.

Verification before publication: the release workflow (run 41374005729) built the five binaries from 0136926 after go, docker and nix checks passed on #62; every binary matches SHA256SUMS, and the manifest.json asset is byte-identical to the pinned web-artifact/manifest.json (web-2.81.0-web.h7628547a4b0d2d18).

Docker: adibhanna/zennotes:2.81.0, 2.81 and latest are published from this tag by the repository's Docker publisher (linux/amd64 and linux/arm64, one digest).