style(frontend): unify styling on semantic design tokens and drop legacy src/components zone
- Replace raw Tailwind colors, hex arbitrary values, inline color styles and
undefined CSS vars with semantic tokens from tailwind.config.js across
routes and lib/components (modal backdrops -> bg-surface-overlay, sky-* ->
info family, dark log console -> terminal/log tokens, etc.)
- Rewrite unstyled AgentRunPanel/DraftArtifactList on $lib/ui atoms
(Button/Badge) and align MarkdownRenderer fallbacks with the token palette
- Extend audit-frontend-style.mjs gate: missing palettes, hex-arbitrary,
inline style color/var checks, routes/*.svelte + lib/components .ts scan;
fix quadratic inline-style regex and duplicate bg-white rule
- Remove legacy src/components zone: $components aliases (svelte/vitest
configs), LEGACY_COMPONENTS walk, stale prompt rules in .kilo/.agents
busya
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