refactor(ui): remove local .btn duplicates in Lifecycle/ContextPreview/Consolidate — use ui/Button (restores :active press feedback, kills transition:all)

[ajianaz]

Problem

Three components define a local copy of the .btn styles instead of using the shared ui/Button.svelte:

• src/lib/components/LifecycleView.svelte:389–423
• src/lib/components/ContextPreviewPanel.svelte (.btn { block, line ~250s)
• src/lib/components/ConsolidatePanel.svelte (.btn styles)

The local copies lost two things the shared button has:

1. :active { transform: scale(0.97) } — press feedback (buttons feel dead on these pages)
2. Explicit transition properties — local copies use transition: all 0.15s ease (LayoutView:395, ContextPreviewPanel:260)

Also MemoryDetail.svelte:452 uses transition: all.

Fix

• Delete local .btn* blocks; rely on ui/Button classes (btn, btn-sm, btn-primary, btn-secondary are already global via ui/)
• Where markup uses class="btn btn-primary" it should just work once local overrides are gone — verify paddings still fit
• Replace transition: all in MemoryDetail:452 with explicit properties

Resolves: press feedback (mobile-UX P24/P38), transition: all (miifb #14), design-system duplication.

Source

Full-app UI audit. Related: hit-area issue (btn-sm sizing).