v0.5.0: NomadArch - Binary-Free Mode Release

Features:
- Binary-Free Mode: No OpenCode binary required
- NomadArch Native mode with free Zen models
- Native session management
- Provider routing (Zen, Qwen, Z.AI)
- Fixed MCP connection with explicit connectAll()
- Updated installers and launchers for all platforms
- UI binary selector with Native option

Free Models Available:
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- Grok Code Fast 1 (256K context)
- GLM-4.7 (205K context)
- Doubao Seed Code (256K context)
- Big Pickle (200K context)

tasks/done/049-unified-picker-refactor.md

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+# Task 049 - Unified & File Picker Tailwind Refactor
+
+## Goal
+Replace the hardcoded gray/blue class stacks in `UnifiedPicker` and `FilePicker` with token-based Tailwind utilities and shared dropdown helpers.
+
+## Prerequisites
+- Tasks 041-048 complete (tokens, message components, tabs, prompt input refactored).
+
+## Acceptance Criteria
+- [ ] `src/components/unified-picker.tsx` and `src/components/file-picker.tsx` reference token-backed utility classes for surfaces, borders, typography, and states.
+- [ ] A shared dropdown utility block lives in `src/styles/components.css` (e.g., `.dropdown-surface`, `.dropdown-item`, `.dropdown-highlight`).
+- [ ] Legacy class strings using `bg-white`, `bg-gray-*`, `dark:bg-gray-*`, etc., are removed from both components.
+- [ ] Loading/empty states, highlights, and diff chips preserve their current behavior in light/dark themes.
+
+## Steps
+1. Inventory all className usages in the two picker components.
+2. Add reusable dropdown utilities to `components.css`, powered by the existing tokens.
+3. Update component markup to use the new helpers and Tailwind utilities with `var(--token)` references for color.
+4. Smoke test: open the picker, filter results, confirm loading/empty states and diff counts.
+
+## Testing Checklist
+- [ ] Run `npm run build`.
+- [ ] In dev mode, trigger the picker from prompt input (file mention) and ensure keyboard navigation/hover states look correct.
+
+## Dependencies
+- Blocks further cleanup of selector components and modals.
+
+## Estimated Time
+0.75 hours
+
+## Notes
+- Branch name suggestion: `feature/task-049-unified-picker-refactor`.
+- Include before/after light & dark screenshots in the PR description if any visual tweaks occur.