docs(site): real screenshots, an English example, and the Rune said plainly

The landing page and README now show the app rather than describing it.
The images are captured by tools/shots, which drives a headless Chrome
over the DevTools protocol — Chrome's own --screenshot flag cannot set a
session cookie, so it would only ever photograph the sign-in page. Kept
in the repository so they can be regenerated when the interface changes,
rather than being something somebody did once by hand.

The quick-add example on the site is in English, with the Danish
equivalent shown underneath — the page is read by people who do not
speak Danish, and the point being made is that both work.

Yggdrasil is stated up front rather than left to the footer: being a
Rune is what this was built for, and somebody running the panel should
learn that in the first paragraph instead of the last line.

Co-Authored-By: Claude Opus 5 <noreply@anthropic.com>

README.md

@@ -5,6 +5,10 @@
   One binary, SQLite inside it, deployed as a Rune in Yggdrasil Panel.
 </p>
 
+<p align="center">
+  <img src="site/screenshots/today.png" alt="The Today view: projects, filters and labels in the sidebar, beside the tasks due today." width="900">
+</p>
+
 ---
 
 **Verdande** is one of the three Norns — the one who spins *that which is becoming*.
@@ -85,10 +89,23 @@ works through the API.
 Search finds `grøn` when you type `gron`, because Unicode does not consider `ø` an
 accented `o` and a Danish-first app that cannot do this is broken for its own users.
 
+## What it looks like
+
+| | |
+|---|---|
+| ![Board view](site/screenshots/board.png) | ![Light theme](site/screenshots/today-light.png) |
+| Board view — one column per section. | The light theme. |
+
+Regenerate these with `go run ./tools/shots` against a running instance.
+
 ## Running it
 
 ### As a Rune in Yggdrasil Panel
 
+verdande is built to be deployed as a **Rune** in
+[Yggdrasil Panel](https://github.com/kristianwind/yggdrasil) — that is its home,
+and the manifest ships in this repository. It runs anywhere Docker does as well.
+
 1. **Runes → Carve a rune (upload)** and pick [`rune/verdande.yaml`](rune/verdande.yaml).
 2. Create a server from it.
 3. Set **Public address** to the address you will actually reach it on. verdande