Release v0.13

[Rarmash]

This PR adds a persistent collection layer to the simulator and connects it across opening flows, glossary screens, and source browsing.

Highlights:

• Persistent My Collection inventory with saved dropped items
• Recent Activity screen for opening and Trade-Up history
• Collection-aware glossary and detail screens with per-item Collected counts
• Collection progress overview by item type
• Per-source stats and progress across container and collection screens
• Tapping collection entries now opens the matching glossary detail page

What’s included:

• Save results from container openings, collection rewards, Trade-Ups, terminal reveals, and collectible openings
• Group inventory entries with filters, sorting, and collection progress breakdown
• Show collected counts across skins, stickers, pins, music kits, agents, graffiti, patches, and charms
• Add source-level Opened, Collected, and Progress stats to:
  • container open pages
  • collection open pages
  • container list cards
  • collection list cards
• Update home navigation and README to reflect the new collection layer

Notes:

• This release focuses on giving the simulator memory and collection persistence, rather than adding a new content domain
• The roadmap now positions v0.14 around test coverage, collection analytics, and overall polish