Replace DaisyUI utilities with Singlestage design tokens in input.css

[Copilot]

After removing the DaisyUI plugin in commit a508f89, input.css.backup still referenced ~102 DaisyUI-only utilities and CSS variables (e.g., bg-base-200, text-base-content, var(--bc), badge, btn, alert) causing Tailwind compilation to fail with undefined class errors.

Changes

Utility replacements:

• Color backgrounds: bg-base-100 → bg-card, bg-base-200 → bg-muted, bg-base-300 → bg-accent
• Text colors: text-base-content → text-foreground
• Borders: border-base-300 → border-border
• CSS variables: var(--bc) → var(--foreground), var(--p) → var(--primary), var(--s) → var(--secondary)

Component class implementations:
Replaced DaisyUI component classes (badge, btn, alert, input) with inline implementations using Tailwind utilities and custom CSS properties.

Alert/status colors:
Added missing CSS variables to :root and dark theme:

--info: 198.6 88.7% 48.4%;
--info-foreground: 210 40% 98%;
--warning: 47.9 95.8% 53.1%;
--warning-foreground: 26 83.3% 14.1%;
--error: 0 84.2% 60.2%;
--error-foreground: 210 40% 98%;
--success: 142.1 76.2% 36.3%;
--success-foreground: 355.7 100% 97.3%;

Tailwind v4 compatibility:
Added @theme directive to expose CSS custom properties as utilities:

@theme {
  --color-muted: hsl(var(--muted));
  --color-foreground: hsl(var(--foreground));
  /* ... */
}

Updated tailwind.config.js to include info/warning/error/success color definitions.

Created active style/input.css from fixed backup and updated .gitignore to track it.

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