feat(economy): add /consumables shop of repeatable, expiring boosts

The economy had many coin faucets but almost no sinks: the /shop is
one-time ownership, and gambling/rob fines route to the house (which
players drain back via jackpots and heists), so they recirculate rather
than destroy coins. Result: steady inflation.

Add a consumables shop as a true recurring sink - buying destroys the
coins and grants a temporary boost, so there's always something to spend
on after gear is maxed:

  - Energiajook XL (500) - 1h of 2x earnings on /work, /beg, /crime
  - XP jook (500)        - 1h of 2x EXP
  - Kohv (300)           - instantly clears all cooldowns

Timed buffs live in a new active_buffs field ({kind: expiry_iso}), pruned
on read; rebuying extends the timer. Effects hook where they belong:
earn_mult in income.do_work/do_beg/do_crime, exp_buff_mult in
levels.award_exp; kohv is self-contained. New /consumables command browses
the menu (with active buffs) or buys a boost. Covered by 9 tests.

Note: active_buffs is a new PocketBase field - run
scripts/sync_pb_schema.py before deploying or buffs won't persist.

Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>

core/economy/__init__.py

@@ -18,6 +18,7 @@ from .house import *
 from .house import _credit_house, _house_record_id
 from .levels import *
 from .shop import *
+from .consumables import *
 from .fishing import *
 from .quests import *
 from .quests import _ensure_quests, _pick_quests, _quest_view
@@ -30,6 +31,6 @@ from .heist import *
 from .admin import *
 
 from . import (  # noqa: E402  (submodules addressable as economy.store etc.)
-    admin, fishing, gambling, heist, house, income, jail, leaderboards,
-    levels, prestige, quests, shop, store,
+    admin, consumables, fishing, gambling, heist, house, income, jail,
+    leaderboards, levels, prestige, quests, shop, store,
 )

core/economy/consumables.py

@@ -0,0 +1,146 @@
+"""Consumables: repeatable, expiring boosts - a recurring coin sink.
+
+Unlike SHOP items (permanent, bought once), consumables are bought over and
+over. Buying either activates a timed buff (stored in user["active_buffs"] as
+{kind: expiry_iso}) or applies an instant effect, and the coins are destroyed -
+so this keeps the shop relevant, and the economy draining, after a player has
+maxed out permanent gear.
+
+Effect hooks live where the effect belongs:
+  - "earn" buff  -> income.do_work / do_beg / do_crime (via earn_mult)
+  - "exp"  buff  -> levels.award_exp             (via exp_buff_mult)
+  - instant kohv -> handled entirely here (wipes cooldown timestamps)
+"""
+
+from __future__ import annotations
+
+from datetime import timedelta
+from typing import TypedDict
+
+import strings
+
+from ..pb_client import DatabaseError
+from ..emoji import EMOJI as E
+from .store import _commit, _locked_by, _now, _parse_dt, _txn, get_user
+
+
+class Consumable(TypedDict):
+    name: str
+    emoji: str
+    cost: int
+    description: str
+    kind: str          # active_buffs key ("earn"/"exp"), or "instant"
+    duration_min: int  # buff lifetime in minutes (0 for instant effects)
+
+
+CONSUMABLES: dict[str, Consumable] = {
+    "energy_xl": {
+        "name": "Energiajook XL",
+        "emoji": E["TipiBULL"],
+        "cost": 500,
+        "description": strings.CONSUMABLE_DESCRIPTIONS["energy_xl"],
+        "kind": "earn",
+        "duration_min": 60,
+    },
+    "xp_potion": {
+        "name": "XP jook",
+        "emoji": "✨",
+        "cost": 500,
+        "description": strings.CONSUMABLE_DESCRIPTIONS["xp_potion"],
+        "kind": "exp",
+        "duration_min": 60,
+    },
+    "kohv": {
+        "name": "Kohv",
+        "emoji": "☕",
+        "cost": 300,
+        "description": strings.CONSUMABLE_DESCRIPTIONS["kohv"],
+        "kind": "instant",
+        "duration_min": 0,
+    },
+}
+
+# Multiplier granted while a buff of each kind is active.
+_BUFF_MULT: dict[str, float] = {"earn": 2.0, "exp": 2.0}
+
+# Cooldown timestamps an instant "kohv" clears.
+_COOLDOWN_FIELDS = ("last_work", "last_beg", "last_crime", "last_rob", "last_fish")
+
+
+# ---------------------------------------------------------------------------
+# Buff inspection helpers (pure - safe to call while holding a user lock)
+# ---------------------------------------------------------------------------
+def active_buffs(user) -> dict[str, str]:
+    """Return {kind: expiry_iso} for buffs that have not expired yet."""
+    buffs = user.get("active_buffs") or {}
+    now = _now()
+    out: dict[str, str] = {}
+    for kind, expiry in buffs.items():
+        dt = _parse_dt(expiry)
+        if dt is not None and dt > now:
+            out[kind] = expiry
+    return out
+
+
+def buff_remaining(user, kind: str) -> timedelta | None:
+    """Remaining time on a buff kind, or None if it is inactive."""
+    expiry = active_buffs(user).get(kind)
+    if expiry is None:
+        return None
+    return _parse_dt(expiry) - _now()
+
+
+def earn_mult(user) -> float:
+    """Earnings multiplier from an active 'earn' buff (1.0 if none)."""
+    return _BUFF_MULT["earn"] if "earn" in active_buffs(user) else 1.0
+
+
+def exp_buff_mult(user) -> float:
+    """EXP multiplier from an active 'exp' buff (1.0 if none)."""
+    return _BUFF_MULT["exp"] if "exp" in active_buffs(user) else 1.0
+
+
+# ---------------------------------------------------------------------------
+# /consumables purchase
+# ---------------------------------------------------------------------------
+@_locked_by(0)
+async def do_buy_consumable(user_id: int, cons_id: str) -> dict:
+    if cons_id not in CONSUMABLES:
+        return {"ok": False, "reason": "not_found"}
+    try:
+        user = await get_user(user_id)
+    except DatabaseError:
+        return {"ok": False, "reason": "db_error"}
+    if user.get("eco_banned"):
+        return {"ok": False, "reason": "banned"}
+
+    cons = CONSUMABLES[cons_id]
+    if user["balance"] < cons["cost"]:
+        return {"ok": False, "reason": "insufficient", "need": cons["cost"] - user["balance"]}
+
+    user["balance"] -= cons["cost"]
+
+    extended = False
+    if cons["kind"] == "instant":
+        for field in _COOLDOWN_FIELDS:
+            user[field] = None
+    else:
+        buffs = dict(user.get("active_buffs") or {})
+        current = _parse_dt(buffs.get(cons["kind"]))
+        # Stack: extend from the current expiry if still active, else from now.
+        extended = current is not None and current > _now()
+        start = current if extended else _now()
+        buffs[cons["kind"]] = (start + timedelta(minutes=cons["duration_min"])).isoformat()
+        user["active_buffs"] = buffs
+
+    await _commit(user_id, user)
+    _txn("BUY_CONSUMABLE", user=user_id, item=cons_id, cost=f"-{cons['cost']}", bal=user["balance"])
+
+    return {
+        "ok": True,
+        "consumable": cons,
+        "balance": user["balance"],
+        "instant": cons["kind"] == "instant",
+        "extended": extended,
+        "remaining": None if cons["kind"] == "instant" else buff_remaining(user, cons["kind"]),
+    }

core/economy/income.py

@@ -14,6 +14,7 @@ from .store import (
     _is_jailed, _locked_by, _log, _now, _prestige_mult, _txn, get_user,
 )
 from .house import _credit_house
+from .consumables import earn_mult
 
 
 # ---------------------------------------------------------------------------
@@ -126,7 +127,7 @@ async def do_work(user_id: int) -> dict:
     work_plus_level = (user.get("prestige_upgrades") or {}).get("work_plus", 0)
     work_plus_mult = 1.0 + work_plus_level * PRESTIGE_SHOP["work_plus"]["effect"]
     coin_mult, _ = _prestige_mult(user)
-    earned = int(base * job_mult * worker_mult * desk_mult * (3.0 if lucky else 1.0) * work_plus_mult * coin_mult)
+    earned = int(base * job_mult * worker_mult * desk_mult * (3.0 if lucky else 1.0) * work_plus_mult * coin_mult * earn_mult(user))
     user["balance"] += earned
     user["last_work"] = _now().isoformat()
     user["work_count"] = user.get("work_count", 0) + 1
@@ -169,7 +170,7 @@ async def do_beg(user_id: int) -> dict:
     jailed = bool(_is_jailed(user))
     beg_mult = 2 if "klaviatuur" in user["items"] else 1
     coin_mult, _ = _prestige_mult(user)
-    earned = int(random.randint(10, 40) * beg_mult * coin_mult)
+    earned = int(random.randint(10, 40) * beg_mult * coin_mult * earn_mult(user))
     user["balance"] += earned
     user["last_beg"] = _now().isoformat()
     user["beg_count"] = user.get("beg_count", 0) + 1
@@ -217,6 +218,7 @@ async def do_crime(user_id: int) -> dict:
         earned = random.randint(200, 500)
         if "mikrofon" in user["items"]:
             earned = int(earned * 1.3)
+        earned = int(earned * earn_mult(user))
         user["balance"] += earned
         user["crimes_succeeded"] = user.get("crimes_succeeded", 0) + 1
         user["lifetime_earned"] = user.get("lifetime_earned", 0) + earned

core/economy/levels.py

@@ -5,6 +5,7 @@ from __future__ import annotations
 import math
 
 from .store import _locked_by, _prestige_mult, get_user, _commit
+from .consumables import exp_buff_mult
 
 
 # ---------------------------------------------------------------------------
@@ -69,7 +70,7 @@ async def award_exp(user_id: int, amount: int) -> dict:
     """Add EXP to a user. Applies prestige exp_mult. Returns old_level, new_level, total exp."""
     user = await get_user(user_id)
     _, exp_mult = _prestige_mult(user)
-    gained = max(1, int(amount * exp_mult))
+    gained = max(1, int(amount * exp_mult * exp_buff_mult(user)))
     old_exp = user.get("exp", 0)
     new_exp = old_exp + gained
     old_level = get_level(old_exp)

core/economy/store.py

@@ -106,6 +106,7 @@ class UserData(TypedDict, total=False):
     last_streak_date: str | None   # ISO date "YYYY-MM-DD"
     items: list[str]
     item_uses: dict                 # {item_id: remaining_uses} for consumables
+    active_buffs: dict              # {buff_kind: expiry_iso} for timed consumable boosts
     jailed_until: str | None       # ISO datetime or None
     jailbreak_used: bool
     reminders: list[str]           # command names user wants DM reminders for
@@ -159,6 +160,7 @@ def _default_user() -> UserData:
         "last_streak_date": None,
         "items": [],
         "item_uses": {},
+        "active_buffs": {},
         "jailed_until": None,
         "jailbreak_used": False,
         "reminders": ["daily", "work", "beg", "crime", "rob"],