feat: Agent Dreaming Mode — idle-time session replay and rule synthesis

Fixes #1019

- DreamingEngine in src/timmy/dreaming.py selects past chat sessions when idle,
  calls the LLM to simulate alternative agent responses, extracts proposed rules,
  and persists them to data/dreams.db (SQLite)
- Background scheduler in app.py triggers dream cycles every dreaming_cycle_seconds
- /dreaming/partial HTMX endpoint renders DREAMING / IDLE / STANDBY status with
  recent proposed rules
- 4 new pydantic-settings fields: dreaming_enabled, dreaming_idle_threshold_minutes,
  dreaming_cycle_seconds, dreaming_timeout_seconds
- 15 unit tests — all pass

Fix pytestmark and IF NOT EXISTS in test fixture to make tests runnable.

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

src/dashboard/app.py

@@ -35,6 +35,7 @@ from dashboard.routes.chat_api_v1 import router as chat_api_v1_router
 from dashboard.routes.daily_run import router as daily_run_router
 from dashboard.routes.db_explorer import router as db_explorer_router
 from dashboard.routes.discord import router as discord_router
+from dashboard.routes.dreaming import router as dreaming_router
 from dashboard.routes.experiments import router as experiments_router
 from dashboard.routes.grok import router as grok_router
 from dashboard.routes.health import router as health_router
@@ -54,7 +55,6 @@ from dashboard.routes.thinking import router as thinking_router
 from dashboard.routes.tools import router as tools_router
 from dashboard.routes.tower import router as tower_router
 from dashboard.routes.voice import router as voice_router
-from dashboard.routes.dreaming import router as dreaming_router
 from dashboard.routes.work_orders import router as work_orders_router
 from dashboard.routes.world import matrix_router
 from dashboard.routes.world import router as world_router

src/dashboard/routes/dreaming.py

@@ -49,6 +49,7 @@ async def dreaming_trigger():
     Useful for testing and manual inspection. Forces idle state temporarily.
     """
     from datetime import UTC, datetime, timedelta
+
     from config import settings
 
     # Temporarily back-date last activity to appear idle

src/timmy/dreaming.py

@@ -19,7 +19,6 @@ Usage::
     status = dreaming_engine.get_status()
 """
 
-import json
 import logging
 import re
 import sqlite3
@@ -290,7 +289,7 @@ class DreamingEngine:
         sessions: list[list[dict]] = []
         current: list[dict] = [rows[0]]
 
-        for prev, curr in zip(rows, rows[1:]):
+        for prev, curr in zip(rows, rows[1:], strict=False):
             try:
                 t_prev = datetime.fromisoformat(prev["timestamp"].replace("Z", "+00:00"))
                 t_curr = datetime.fromisoformat(curr["timestamp"].replace("Z", "+00:00"))

tests/unit/test_dreaming.py

@@ -3,13 +3,13 @@
 import sqlite3
 from contextlib import closing
 from datetime import UTC, datetime, timedelta
-from pathlib import Path
-from unittest.mock import AsyncMock, MagicMock, patch
+from unittest.mock import AsyncMock, patch
 
 import pytest
 
-from timmy.dreaming import DreamingEngine, DreamRecord, _SESSION_GAP_SECONDS
+from timmy.dreaming import _SESSION_GAP_SECONDS, DreamingEngine, DreamRecord
 
+pytestmark = pytest.mark.unit
 
 # ── Fixtures ──────────────────────────────────────────────────────────────────
 
@@ -32,7 +32,7 @@ def chat_db(tmp_path):
     db_path = tmp_path / "chat.db"
     with closing(sqlite3.connect(str(db_path))) as conn:
         conn.execute("""
-            CREATE TABLE chat_messages (
+            CREATE TABLE IF NOT EXISTS chat_messages (
                 id INTEGER PRIMARY KEY AUTOINCREMENT,
                 role TEXT NOT NULL,
                 content TEXT NOT NULL,