chore: docker, config, delivery sinks, dialogue, and agent docs

- Dockerfile: multi-stage build with CGO_ENABLED=0, embedder model copy,
  non-root user, healthcheck, and /data volume.
- docker-compose.yml: mavend + mavweb services with shared volume, health
  checks, and restart policy.
- .gitignore: ignore models/llm/*.gguf, deploy/telegram.env, tmp artifacts.
- deploy/mavend.json: add LLM, phraser, voice sections (embedder, model
  paths, wake sensitivity). Add telegram token env-var expansion.
- deploy/telegram.env.example: template for telegram bot token.
- internal/config/config.go: add LLM config struct, voice config struct
  (embedder, llama, wake sensitivity), telegram token loading.
- telegramsink: add chat intent delivery support alongside existing types.
- voicesink: skip empty payloads in delivery.
- dialogue/session: add chat intent to anaphora resolution, test coverage.
- AGENTS.md: update with LLM embedder, LFM model download/configure steps,
  new UI conventions.
- REARCH.md: architecture research document.
- cmd/mavend/main.go: wire LLM config, phraser, embedder, telegram config,
  WebAuthn, IPC event/routine handlers, and reactive notes.

internal/dialogue/session.go

@@ -13,6 +13,7 @@ const (
 	IntentFact     Intent = "fact"
 	IntentNote     Intent = "note"
 	IntentQuery    Intent = "query"
+	IntentChat     Intent = "chat"
 	IntentSystem   Intent = "system"
 )
 

internal/dialogue/session_test.go

@@ -54,6 +54,24 @@ func TestSessionStoreDefaultTTL(t *testing.T) {
 	}
 }
 
+func TestSessionStoreCustomTTL(t *testing.T) {
+	// A session with an explicit TTL should use that instead of the default.
+	now := time.Date(2026, 7, 6, 12, 0, 0, 0, time.UTC)
+	store := NewSessionStore(2 * time.Minute)
+
+	sess := &Session{Intent: IntentQuery, Timestamp: now, TTL: 15 * time.Minute}
+	store.Put("chatty", sess)
+
+	// Should still be alive at 10 minutes (past the 2m default).
+	if s := store.Get("chatty", now.Add(10*time.Minute)); s == nil {
+		t.Error("chat session with 15m TTL expired at 10m — custom TTL not applied")
+	}
+	// Should be expired after 20 minutes.
+	if s := store.Get("chatty", now.Add(20*time.Minute)); s != nil {
+		t.Error("chat session with 15m TTL should be expired at 20m")
+	}
+}
+
 func TestInheritSlots(t *testing.T) {
 	now := time.Date(2026, 7, 6, 0, 0, 0, 0, time.UTC)