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/v0.9.2.en.md

@@ -0,0 +1,27 @@
+# v0.9.2 — Release Notes
+
+**Date:** 2026-08-05 · **Tag:** [`v0.9.2`](https://git.kubebase.de/admin/tool-evaluator/releases/tag/v0.9.2)
+
+## Fixes & Polish
+
+- **Compare:** The limit for comparing tools side-by-side was raised from 8 to
+  **9 tools** — enforced both server-side and in the client. Attempting to add
+  a tool beyond the limit no longer adds it and now shows a notice (previously
+  it wrongly showed the "nothing to compare" page).
+
+## API Changes
+
+- `GET /compare`: now accepts up to 9 `ids` (previously 8).
+
+## Operations / Upgrade
+
+- **Migration:** none. **Breaking Changes:** none.
+
+## Known Limitations
+
+- None within the scope of this release.
+
+## Links
+
+- Commit: [`<short-sha>`](https://git.kubebase.de/admin/tool-evaluator/commit/<short-sha>)
+- Tag: [`v0.9.2`](https://git.kubebase.de/admin/tool-evaluator/releases/tag/v0.9.2)