feat: compare limit 9, format-aware import placeholder, help links

- Raise compare limit from 8 to 9 (server + client, toast on overflow)
- Make import textarea placeholder match selected format (CSV/JSON/YAML/auto)
- Add GuideHelp links to admin create/edit user dialogs and tool import dialog

docs/releases/v0.9.1/handbook/watchlist.en.md

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+
+# Watchlist
+
+The **watchlist** is a personal favorites list. You can open and compare the
+tools in it at any time with a click.
+
+> The watchlist is a **premium feature** (Premium/Enterprise) and is always
+> available to admins.
+
+## Prerequisite
+
+You need a plan with the `watchlist` permission. If it is missing, a note
+about switching plans appears at the bookmark
+(see [Plans & permissions](/docs/handbook/plaene)).
+
+## Saving a tool
+
+- On every card/row in the **Browse tools** section you will find the
+  **bookmark icon**.
+- A click saves the tool to your watchlist — the icon becomes filled.
+- Clicking it again removes it.
+
+## Viewing the watchlist
+
+Open the watchlist via the user menu or the sidebar. It shows all saved tools
+as cards. The filled bookmark on a card removes the tool from the list.
+
+## Where is the watchlist stored?
+
+The watchlist is a list of tool IDs in your **user preferences**. This way it
+is linked to your account across devices.
+
+API reference: [`GET /auth/me/watchlist`](/docs/reference/endpoints/auth#getMeWatchlist).