feat: restore roast-of-the-day with 14-day prompt history

Separate roast generation from motivation again and pass cached roasts
from the last 14 days into the OpenRouter prompt to reduce repetition.

Co-authored-by: Cursor <cursoragent@cursor.com>

server/app.py

@@ -11,7 +11,7 @@ from fastapi import Depends, FastAPI, HTTPException, Request
 from fastapi.responses import FileResponse, JSONResponse
 from fastapi.staticfiles import StaticFiles
 
-from server.ai import generate_daily_motivation, get_roast_of_the_day
+from server.ai import generate_daily_motivation, generate_roast_of_the_day, get_roast_of_the_day
 from server.auth import create_token, require_auth, verify_pin
 from server.config_loader import load_meds_config, slot_to_dict, today_str
 from server.db import ensure_schema, get_db, new_id, utc_now_iso
@@ -40,13 +40,14 @@ _configure_logging()
 logger = logging.getLogger(__name__)
 
 
-async def _ensure_today_motivation() -> None:
+async def _ensure_today_ai_texts() -> None:
     config = load_meds_config()
     db = await get_db()
     try:
         await generate_daily_motivation(db, config.timezone)
+        await generate_roast_of_the_day(db, config.timezone)
     except Exception:
-        logger.exception("Startup motivation generation failed")
+        logger.exception("Startup AI text generation failed")
     finally:
         await db.close()
 
@@ -57,7 +58,7 @@ async def lifespan(app: FastAPI):
     await ensure_schema(db)
     await db.close()
     start_scheduler()
-    asyncio.create_task(_ensure_today_motivation())
+    asyncio.create_task(_ensure_today_ai_texts())
     yield