feat(workshop): project tags, sorting, and filtering

[Crauzer]

Summary

Add tagging, sorting, and filtering capabilities to the workshop project list so modders can organize and find their projects efficiently as their collection grows.

Proposed Features

Tags

• Allow users to assign tags to projects (e.g., "champion-skin", "map", "hud", "sound", "wip", "released")
• Tag chips visible on project cards
• Color-coded tags for visual distinction
• Predefined common tags + custom user-defined tags
• Tags stored in mod.config.json or a separate workshop metadata file

Sorting

• Sort dropdown in the toolbar with options:
  • Last Modified (current default)
  • Name A-Z / Z-A
  • Date Created
  • Version
• Persist sort preference in app settings

Filtering

• Filter by tag (click tag chips in toolbar to toggle filter)
• Filter by validation status (healthy / has warnings / has errors)
• Combine filters (e.g., "champion-skin" + "wip")
• Clear all filters button
• Show active filter count in toolbar

Search Improvements

• Extend search to cover description and author fields (currently only name/slug)
• Fuzzy/typo-tolerant search
• Search highlighting in results

Why This Matters

Once a modder has more than ~10 projects, the current flat list sorted only by last-modified becomes hard to navigate. Tags and filters are essential for modders who maintain large collections or work on multiple mod types simultaneously.

Implementation Notes

• Tags could be stored as a tags: string[] field in mod.config.json (or workshop-level metadata)
• Sort and filter state should persist across sessions (store in app settings or localStorage)
• Client-side filtering is fine for the expected project count (<500)
• Consider a compact filter bar that collapses when no filters are active

Related

• Part of the Workshop UX Improvements initiative