refactor: remove KI-Orakel from history page and backend

Drop oracle UI, API endpoint, scheduled generation, and related docs.

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

server/ai.py

@@ -21,12 +21,6 @@ MOTIVATION_SYSTEM = (
     "Genau ein Satz auf Deutsch, max 25 Wörter. Keine Anführungszeichen um den Spruch."
 )
 
-ORACLE_SYSTEM = (
-    "Du bist das tägliche KI-Orakel einer ADHS-Medikamenten-App. "
-    "Passiv-aggressiv, trocken, max 4 Sätze auf Deutsch. Keine medizinischen Ratschläge."
-)
-
-
 async def _get_cache(db: aiosqlite.Connection, key: str) -> str | None:
     cur = await db.execute("SELECT content FROM ai_cache WHERE key = ?", (key,))
     row = await cur.fetchone()
@@ -93,18 +87,6 @@ def _motivation_key(day: str) -> str:
     return f"motivation:v2:{day}"
 
 
-def _oracle_key(day: str) -> str:
-    return f"oracle:v3:{day}"
-
-
-async def _cached_oracle(db: aiosqlite.Connection, day: str) -> str | None:
-    cached = await _get_cache(db, _oracle_key(day))
-    if cached:
-        return cached
-    week = datetime.strptime(day, "%Y-%m-%d").strftime("%Y-W%W")
-    return await _get_cache(db, f"oracle:v2:{week}")
-
-
 async def _cached_motivation(db: aiosqlite.Connection, day: str) -> str | None:
     cached = await _get_cache(db, _motivation_key(day))
     if cached:
@@ -154,68 +136,3 @@ async def get_daily_motivation(db: aiosqlite.Connection, tz: ZoneInfo) -> dict[s
 
 async def get_roast_of_the_day(db: aiosqlite.Connection, tz: ZoneInfo) -> dict[str, Any]:
     return await get_daily_motivation(db, tz)
-
-
-async def generate_oracle(
-    db: aiosqlite.Connection,
-    tz: ZoneInfo,
-    day: str | None = None,
-    *,
-    force: bool = False,
-) -> dict[str, Any]:
-    day = day or datetime.now(tz).strftime("%Y-%m-%d")
-    key = _oracle_key(day)
-    if not force:
-        cached = await _cached_oracle(db, day)
-        if cached:
-            return {"text": cached, "source": "cache", "day": day}
-
-    stats = await compute_stats(db)
-    days_active = stats["days_active"]
-    window = stats["compliance_window_days"]
-    young_app = days_active < 90
-    context = (
-        f"App aktiv seit {days_active} Tag(en), erste Einnahme am {stats['first_day']}. "
-        if young_app
-        else ""
-    )
-    caveat = (
-        "Die App ist noch jung — lange Streaks oder 90-Tage-Compliance sind noch nicht realistisch erreichbar. "
-        "Bewerte nur die verfügbaren Daten, sei fair aber sarkastisch. "
-        if young_app
-        else ""
-    )
-    prompt = (
-        f"Täglicher Orakel-Report für heute. {context}{caveat}"
-        f"Streak: {stats['streak']} Tage. "
-        f"Compliance über {window} Tag(e): {stats['compliance_percent']}%. "
-        f"Genommen gesamt: {stats['total_taken']}."
-    )
-    text = await _call_openrouter(prompt, system=ORACLE_SYSTEM)
-    if not text:
-        if young_app:
-            text = (
-                f"Tag {days_active} deiner Medis-Karriere. "
-                f"Streak: {stats['streak']}. Compliance ({window} Tage): {stats['compliance_percent']}%. "
-                "Das Orakel ist beeindruckt — oder gelangweilt. Grenzwertig."
-            )
-        else:
-            text = pick("streak", streak=stats["streak"]) + f" Compliance: {stats['compliance_percent']}%."
-        source = "fallback"
-    else:
-        source = "ai"
-    await _set_cache(db, key, text)
-    logger.info("Generated daily oracle for %s (%s)", day, source)
-    return {"text": text, "source": source, "day": day}
-
-
-async def get_oracle(db: aiosqlite.Connection, tz: ZoneInfo) -> dict[str, Any]:
-    day = datetime.now(tz).strftime("%Y-%m-%d")
-    cached = await _cached_oracle(db, day)
-    if cached:
-        return {"text": cached, "source": "cache", "day": day}
-    return {
-        "text": "Das Orakel bereitet sich vor. Schau später nochmal rein.",
-        "source": "pending",
-        "day": day,
-    }