Changelog

All notable changes made during this working session (March 1, 2026).

Added src/prompt.js to centralize prompt construction (buildPrompt) and reduce repeated prompt-building logic.
Added a short-lived in-memory context cache in src/bot.js to reuse prepared context across the continuation loop and normal replies.
Reduced default memory/prompt sizes in src/config.js:
- shortTermLimit: 10 -> 6
- summaryTriggerChars: 3000 -> 2200
- relevantMemoryCount: 5 -> 3
- Added longTermFetchLimit (default 120)
Limited long-term memory retrieval to a recent window before similarity scoring in src/memory.js (uses longTermFetchLimit).
Summarized live web-search intel before injecting it into the prompt (keeps the payload shorter) in src/bot.js.
Debounced memory DB persistence in src/memory.js to batch multiple writes (instead of exporting/writing on every mutation).

Revamped the dashboard UI layout + styling in src/public/index.html.
Added long-term memory create/edit support:
- API: POST /api/users/:id/long in src/dashboard.js
- Store: upsertLongTerm() in src/memory.js
Added long-term memory pagination:
- API: GET /api/users/:id/long?page=&per= returns { rows, total, page, per, totalPages } via getLongTermMemoriesPage() in src/memory.js
- UI: paging controls; long-term list shows 15 per page (LONG_TERM_PER_PAGE = 15)
Added "search preview" UX in the dashboard to quickly reuse a similar memory result as an edit/create starting point ("Use this memory").
Added a simple recall timeline:
- API: GET /api/users/:id/timeline?days= in src/dashboard.js
- Store: getMemoryTimeline() in src/memory.js
- UI: lightweight bar chart in src/public/index.html

Fixed dashboard long-term pagination wiring (getLongTermMemoriesPage import/usage) in src/dashboard.js.
Fixed dashboard long-term "Edit" button behavior by wiring row handlers in src/public/index.html.
Prevented button interactions from crashing the bot on late/invalid updates by deferring updates and editing the message in src/bot.js.

Added a memory-aware reaction badge: bot reacts with 🧠 when long-term memories were injected into the prompt (src/bot.js).
Added a lightweight blackjack mini-game:
- Start via text trigger /blackjack (not a registered slash command).
- Single-embed game UI with button components for actions (Hit / Stand; Split is present as a placeholder).
- Improved interaction handling to avoid "Unknown interaction" crashes by deferring updates and editing the message (src/bot.js).

Relaxed the "empty response" guard in src/openai.js:
- Still throws when the provider returns no choices.
- If choices exist but content is blank, returns an empty string instead of forcing fallback (reduces noisy false-positive failures).

Added useGlobalMemories to buildPrompt, allowing long-term retrieval across every stored user_id without losing the current user's short-term history.
Long-term results now carry their user_id so the prompt can label each snippet (e.g., - [userId] ...) and the retrieval scoring still ranks by cosine similarity plus importance.