ui: toast per-type durations, Details modal for long errors, concise acme.sh failure summary

docs/hoover.md

@@ -677,7 +677,15 @@ const res = await apiFetch('/api/firewall/zones', { method: 'GET' });
 
 ### `toast(message, type, duration)`
 
-Show a toast notification. Auto-dismisses after `duration` ms (default 4000). `type` is one of `'info'`, `'success'`, `'error'`, `'warning'`. Returns a toast ID.
+Show a toast notification. `type` is one of `'info'`, `'success'`, `'error'`, `'warning'`. Returns a toast ID.
+
+When `duration` is omitted, per-type defaults apply: `'info'` and `'success'` auto-dismiss after 4000 ms, `'warning'` after 8000 ms, and `'error'` toasts **never** auto-dismiss (they stay until dismissed so long failure messages remain readable). Pass an explicit `duration` (ms, `0` = indefinite) to override the default.
+
+Toast behavior:
+
+- Dismissal is only via the `×` button (or `dismissToast(id)`); clicking the toast body does not dismiss it.
+- The auto-dismiss timer pauses while the pointer is over the toast.
+- Long messages (>200 chars or containing newlines) render compact — first line, ellipsized — with a **Details** button that opens a modal showing the full text in a scrollable mono block.
 
 ### `dismissToast(id)`