fix: validate Managing Miscellania coffers deposit and withdraw amounts

Clamp a deposit to the coins held as well as the coffer space, and ignore a withdraw count of 0 or less. Listed in server/PATCHES.md until LostCity ships its own fix.

server/PATCHES.md

@@ -373,6 +373,10 @@ Upgrade hazards:
 - [ ] **`scripts/login_logout/login.rs2`** — random-event timer gated on `map_random_events`.
 - [ ] **`scripts/macro events/scripts/macro_events.rs2`** — macro events disabled when off.
 - [ ] **`scripts/shop/configs/shop.varp`** — `transmit=yes` on shop varps (bot shop state).
+- [ ] **`scripts/minigames/game_managing_miscellania/scripts/managing_miscellania.rs2`** — coffers
+      deposit clamps to `min(requested, coffer space, coins held)`; withdraw returns on a count of
+      0 or less. Reported upstream to LostCity; drop this patch once their 289 branch carries a fix.
+      Verify: `grep -n "withdraw_amt <= 0" scripts/minigames/game_managing_miscellania/scripts/managing_miscellania.rs2`
 - [x] **README art** — moved out of the vendored tree to `docs/media/` (promo.gif, discord.svg,
       hiscores.svg, task_length.svg); nothing in `content/title/` is locally modified anymore.
 - [ ] Smithing arrowheads + telegrab + nails fixes live in content history; they're additive

server/content/scripts/minigames/game_managing_miscellania/scripts/managing_miscellania.rs2

@@ -98,13 +98,7 @@ def_int $requested_deposit = last_int;
 if_close;
 p_delay(0);
 def_int $coffer_space = sub(5000000, %misc_coffers);
-def_int $deposit_amt = $requested_deposit;
-
-if ($deposit_amt > $coffer_space) {
-    $deposit_amt = $coffer_space;
-} else if($deposit_amt > $inv_coins) {
-    $deposit_amt = $inv_coins;
-}
+def_int $deposit_amt = min($requested_deposit, min($coffer_space, $inv_coins));
 
 if ($deposit_amt > 0) {
     inv_del(inv, coins, $deposit_amt);
@@ -132,6 +126,10 @@ p_countdialog;
 def_int $withdraw_amt = last_int;
 if_close;
 p_delay(0);
+if ($withdraw_amt <= 0) {
+    ~open_manage_miscellania_interface;
+    return;
+}
 if ($withdraw_amt > %misc_coffers) {
     $withdraw_amt = %misc_coffers;
 }