App shell with sidebar and theme switch; attribute-set management; project rename; new pages for projects, runbooks and activity

Co-Authored-By: Claude Sonnet 5.5 <noreply@anthropic.com>

Assistant: claude-code
Assistant-Model: sonnet
Assistant-Process: 295952@bnt-lap001
Assistant-Session: e93f64ad-516c-46eb-9666-aad8d300c477

workplans/RBT-WP-0004-local-runbook-ui.md

@@ -230,6 +230,21 @@ can only be changed with an override and are recorded as `changed-after-use`, sa
 opened and downloaded, with safety rules; (f) run start, finish and duration, per-step duration, and the average duration of successful
 runs next to the score. Documented in `docs/run-spec.md` and `docs/maturity-and-projects.md`.
 
+## App shell, theme, attribute-set management and project editing
+
+```task
+id: RBT-WP-0004-T15
+status: done
+priority: high
+```
+
+Done 2026-09-29 from Bernd's feedback (no way to switch theme, no navigation to user settings or attribute sets): a sidebar shell on every
+page (Home, Projects, Runbooks, Attribute sets, Activity; you and a theme switch at the bottom; a top bar on narrow screens); a theme
+switch that cycles system, light and dark and remembers the choice (`?theme=dark` also sets it); dedicated Projects, Runbooks and Activity
+pages; attribute sets listed, inspected with their resolved values and sources, created and edited (values, requirement, note, extends;
+secrets, bad names, unknown and circular `extends` refused, a refused save changes nothing); the project name, description and goal
+editable from the project page. Bernd confirmed the theme and navigation. Not done: deleting an attribute set, editing templates.
+
 ## Acceptance Criteria
 
 - Bernd can complete the SSH tutorial pack in the UI without pasting outputs to an agent.