Add suit-following variant for bomb policy

Expand BombPolicy from a simple on/off toggle to three options:
- NoBombs: bombs disabled (default)
- AllowBombs: bombs can be played regardless of suit
- AllowBombsSuitFollowing: bombs must follow suit (same suit as led,
  trump bombs always allowed, off-suit only when void in led suit)

This gives players the choice between house rules (any suit) and
standard Chinese rules (must follow suit) for bomb plays.

https://claude.ai/code/session_01E543mMXuFZfstF526sWFy1

Author: claude

core/src/message.rs

@@ -390,7 +390,8 @@ impl MessageVariant {
                 format!("{} required tractors to be at least {} cards wide by {} tuples long", n?, tractor_requirements.min_count, tractor_requirements.min_length),
             GameVisibilitySet { visibility: GameVisibility::Public} => format!("{} listed the game publicly", n?),
             GameVisibilitySet { visibility: GameVisibility::Unlisted} => format!("{} unlisted the game", n?),
-            BombPolicySet { bomb_policy: BombPolicy::AllowBombs } => format!("{} enabled bomb cards", n?),
+            BombPolicySet { bomb_policy: BombPolicy::AllowBombs } => format!("{} enabled bomb cards (any suit)", n?),
+            BombPolicySet { bomb_policy: BombPolicy::AllowBombsSuitFollowing } => format!("{} enabled bomb cards (must follow suit)", n?),
             BombPolicySet { bomb_policy: BombPolicy::NoBombs } => format!("{} disabled bomb cards", n?),
         })
     }

frontend/src/Initialize.tsx

@@ -587,7 +587,12 @@ const UncommonSettings = (props: IUncommonSettings): JSX.Element => {
               onChange={props.setBombPolicy}
             >
               <option value="NoBombs">Disabled</option>
-              <option value="AllowBombs">Enabled</option>
+              <option value="AllowBombs">
+                Enabled (any suit, no suit-following required)
+              </option>
+              <option value="AllowBombsSuitFollowing">
+                Enabled (must follow suit)
+              </option>
             </select>
           </label>
         </div>

frontend/src/gen-types.d.ts

@@ -1,4 +1,4 @@
-/* eslint-disable */
+ 
 /**
  * This file was automatically generated by json-schema-to-typescript.
  * DO NOT MODIFY IT BY HAND. Instead, modify the source JSONSchema file,
@@ -217,7 +217,7 @@ export type KittyTheftPolicy = "AllowKittyTheft" | "NoKittyTheft";
 export type GameShadowingPolicy = "AllowMultipleSessions" | "SingleSessionOnly";
 export type GameStartPolicy = "AllowAnyPlayer" | "AllowLandlordOnly";
 export type BackToTwoSetting = "Disabled" | "SingleJack";
-export type BombPolicy = "NoBombs" | "AllowBombs";
+export type BombPolicy = "NoBombs" | "AllowBombs" | "AllowBombsSuitFollowing";
 export type GameVisibility = "Public" | "Unlisted";
 export type Card = string;
 export type TrickUnit =

frontend/src/gen-types.schema.json

@@ -719,8 +719,22 @@
       "enum": ["AllowBidTakeback", "NoBidTakeback"]
     },
     "BombPolicy": {
-      "type": "string",
-      "enum": ["NoBombs", "AllowBombs"]
+      "oneOf": [
+        {
+          "type": "string",
+          "enum": ["NoBombs"]
+        },
+        {
+          "description": "Bombs allowed; a bomb can be played regardless of suit when following.",
+          "type": "string",
+          "enum": ["AllowBombs"]
+        },
+        {
+          "description": "Bombs allowed, but standard suit-following rules apply: a bomb must be in the led suit, or a trump bomb if the player is void in the led suit.",
+          "type": "string",
+          "enum": ["AllowBombsSuitFollowing"]
+        }
+      ]
     },
     "BonusLevelPolicy": {
       "type": "string",