ui: add lightweight frontend build pipeline

TASKS.md

@@ -2,20 +2,18 @@
 
 ## Current
 
-### `feat/frontend-build-pipeline`
+### `feat/frontend-css-state-cleanup`
 
 Status: in_progress
 
 DoD:
-- UI assets are bundled through a lightweight pipeline suitable for the current stack
-- local source files remain readable, but shipped JS is no longer served as dozens of unbundled scripts
-- vendor dependencies move under package-managed installation where practical
-- Docker UI image builds the frontend assets before packaging them into nginx
-- existing UI e2e coverage stays green after the build change
+- button and control state visuals move from inline `element.style` mutations into CSS classes
+- wizard navigation and similar interactive UI use semantic state classes instead of manual style strings
+- existing UI e2e coverage stays green after the CSS-state cleanup
 
 ## Next
 
-- `feat/frontend-css-state-cleanup`
+- `feat/frontend-performance-polish`
 
 ## Backlog
 
@@ -27,7 +25,6 @@ DoD:
 - `feat/frontend-template-safety-cleanup`
 - `feat/frontend-shell-unification`
 - `feat/frontend-wizard-modularization`
-- `feat/frontend-build-pipeline`
 - `feat/frontend-css-state-cleanup`
 - `feat/frontend-performance-polish`
 - `feat/frontend-observability-and-testability`