Add user profile and persistent AI memory system with configurable importance threshold

[Copilot]

Implements user self-description field and AI memory system with threshold-based filtering (0.1-10.0) to enable personalized, context-aware conversations.

Core Components

Memory Model (Memory.cs, MemoryManager.cs)

• JSON-backed persistence with CRUD operations, search, and category filtering
• Relevance scoring: score = importance + recency_decay(30d) + access_frequency
• Auto-cleanup at 1000 memory limit, removing least relevant entries
• Duplicate detection on import

Automatic Memory Creation (OllamaClient.cs)

• Heuristic-based importance scoring from conversation analysis:
  • Personal info ("I am...", "my name"): 8.0
  • Preferences ("I like...", "I prefer..."): 7.0
  • Explicit markers ("remember...", "important"): 9.0
  • Recurring topics: 6.0
  • Long messages (>100 chars): 5.5
• Only memories exceeding configured threshold are persisted
• Top 10 relevant memories injected into AI system prompt

UI Integration (MemoryManagerForm.cs, SettingsForm.cs)

• Memory management dialog: grid view, search, category filter, import/export
• Settings controls: user description text field, enable toggle, threshold slider (0.1-10.0)
• "Manage Memories..." menu item in system tray

Example Usage

// User describes themselves in Settings
settings.UserDescription = "Software developer interested in ML and hiking";
settings.EnableMemories = true;
settings.MemoryThreshold = 5.0; // Moderate filtering

// During chat, AI automatically creates memory:
// "User preference: I like hiking" (importance: 7.0) ✓ saved
// "User mentioned coffee" (importance: 3.0) ✗ below threshold

// Next conversation includes top memories in context:
// RELEVANT MEMORIES:
// - Software developer interested in ML and hiking
// - User preference: I like hiking

Storage

Memories: %APPDATA%/MSAgentAI/memories.json
Settings: %APPDATA%/MSAgentAI/settings.json

Categories: user_info, preference, important, recurring, conversation, general

Original prompt

Add user prompting, so the user can describe themselves.
Add memories so the AI can remember things in any conversation, with a threshold (0.1 to 10) of how easily it would be to create a memorable event. Memories should also be editable, addable, removable, and optional.

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