feat(paper): add world, display_name, channel_id and role chat placeholders

Operators asked for more of the sender's context in chat formats than the
name alone. {world} covers direct messages and channel chat; the channel
details and the sender's display name and role only exist for channel
chat, so only that format accepts them.

A direct message from another server renders {world} empty: the relay does
not carry the sender's world, and adding it would need a protocol bump and
a coordinated Velocity release for one placeholder. The renderer now
accepts underscores so the snake_case names match as written.

Co-Authored-By: Claude <noreply@anthropic.com>

4 files changed, 12 insertions, 4 deletions

diff --git a/website/src/docs/configuration.md b/website/src/docs/configuration.md
index 4b46b55..35e7599 100644
--- a/website/src/docs/configuration.md
+++ b/website/src/docs/configuration.md
@@ -172,8 +172,8 @@ proxy logs for everyone else.
 
 | Key | Default | Available Placeholders |
 |-----|---------|----------------------|
-| `directMessageFormat` | `§7[§e{sender} §7>> §e{recipient}§7] §f{message}` | `{sender}`, `{recipient}`, `{message}` |
-| `channelMessageFormat` | `§7[§b#{channel}§7] §e{sender}: §f{message}` | `{sender}`, `{message}`, `{channel}` |
+| `directMessageFormat` | `§7[§e{sender} §7>> §e{recipient}§7] §f{message}` | `{sender}`, `{recipient}`, `{message}`, `{world}` |
+| `channelMessageFormat` | `§7[§b#{channel}§7] §e{sender}: §f{message}` | `{sender}`, `{message}`, `{channel}`, `{channel_id}`, `{display_name}`, `{world}`, `{role}` |
 | `crossServerGlobalChatFormat` | `§7[§6{server}§7] §e{sender}: §f{message}` | `{sender}`, `{message}`, `{server}` |
 
 ## Data Files
diff --git a/website/src/docs/reference/message-format.md b/website/src/docs/reference/message-format.md
index 68fee84..b0976fa 100644
--- a/website/src/docs/reference/message-format.md
+++ b/website/src/docs/reference/message-format.md
@@ -17,6 +17,10 @@ These are the only settings `/lc reload` <Badge type="tip" text="v1.4.0~" /> app
 | `{message}` | Message content | All |
 | `{channel}` | Channel name | `channelMessageFormat` |
 | `{server}` | Server name | `crossServerGlobalChatFormat` |
+| `{world}` <Badge type="tip" text="v1.5.0~" /> | World the sender is in. Empty for a direct message from another server | `directMessageFormat`, `channelMessageFormat` |
+| `{display_name}` <Badge type="tip" text="v1.5.0~" /> | Display name of the sender, including colors set by other plugins | `channelMessageFormat` |
+| `{channel_id}` <Badge type="tip" text="v1.5.0~" /> | Channel ID | `channelMessageFormat` |
+| `{role}` <Badge type="tip" text="v1.5.0~" /> | Sender's role in the channel (Owner / Moderator / Member) | `channelMessageFormat` |
 
 ## Format List
 
diff --git a/website/src/ja/docs/configuration.md b/website/src/ja/docs/configuration.md
index 59d0c73..a5c211a 100644
--- a/website/src/ja/docs/configuration.md
+++ b/website/src/ja/docs/configuration.md
@@ -167,8 +167,8 @@ LUNATICCHAT_DEBUG=velocity,protocol
 
 | キー | デフォルト | 利用可能なプレースホルダー |
 |------|------------|--------------------------|
-| `directMessageFormat` | `§7[§e{sender} §7>> §e{recipient}§7] §f{message}` | `{sender}`, `{recipient}`, `{message}` |
-| `channelMessageFormat` | `§7[§b#{channel}§7] §e{sender}: §f{message}` | `{sender}`, `{message}`, `{channel}` |
+| `directMessageFormat` | `§7[§e{sender} §7>> §e{recipient}§7] §f{message}` | `{sender}`, `{recipient}`, `{message}`, `{world}` |
+| `channelMessageFormat` | `§7[§b#{channel}§7] §e{sender}: §f{message}` | `{sender}`, `{message}`, `{channel}`, `{channel_id}`, `{display_name}`, `{world}`, `{role}` |
 | `crossServerGlobalChatFormat` | `§7[§6{server}§7] §e{sender}: §f{message}` | `{sender}`, `{message}`, `{server}` |
 
 ## データファイル
diff --git a/website/src/ja/docs/reference/message-format.md b/website/src/ja/docs/reference/message-format.md
index 3eddd1a..79c6745 100644
--- a/website/src/ja/docs/reference/message-format.md
+++ b/website/src/ja/docs/reference/message-format.md
@@ -17,6 +17,10 @@ layout: doc
 | `{message}` | メッセージの内容 | すべて |
 | `{channel}` | チャンネル名 | `channelMessageFormat` |
 | `{server}` | サーバー名 | `crossServerGlobalChatFormat` |
+| `{world}` <Badge type="tip" text="v1.5.0~" /> | 送信者がいるワールド名．別サーバーから届いたダイレクトメッセージでは空になります | `directMessageFormat`, `channelMessageFormat` |
+| `{display_name}` <Badge type="tip" text="v1.5.0~" /> | 送信者の表示名．他のプラグインが設定した色も含みます | `channelMessageFormat` |
+| `{channel_id}` <Badge type="tip" text="v1.5.0~" /> | チャンネル ID | `channelMessageFormat` |
+| `{role}` <Badge type="tip" text="v1.5.0~" /> | チャンネル内での送信者の役割 (オーナー / モデレーター / メンバー) | `channelMessageFormat` |
 
 ## フォーマット一覧