Epic: Phase 3 - Chat and Structure Expansion

[mjkatgithub]

Goal

Deliver Phase 3 as small, shippable feature slices managed through one board.

Scope

• E2EE Decryption Foundation
• Room Categories (Subspaces) with Drag and Drop
• Space Grouping in Space Rail with Drag and Drop
• Image Message Rendering
• Message Reactions
• Message Replies
• Message Threads
• Favorites for Spaces and Rooms
• Space Creation Flow (from UI stub to real create)
• Space Settings and Structure Management

Definition of Done

• All feature issues are created and linked as sub-issues of this epic
• All feature issues are assigned to milestone "Phase 3"
• All feature issues are added to project "decentra" (Feature: Image message rendering #7)
• Each feature issue has acceptance criteria and a test checklist
• Each feature is developed on its own branch using feature/<feature>