refactor(channelserver): split repo_guild.go into domain-focused files

The 1004-line monolith covered 11 game subsystems across 62 methods.
Split into 7 files by domain (RP, posts, alliances, adventures, hunts,
cooking) while keeping core CRUD/membership/scouts in the original.
Same package, receiver, and interface — no behavior changes.

server/channelserver/repo_guild_posts.go

@@ -0,0 +1,89 @@
+package channelserver
+
+import (
+	"context"
+	"time"
+)
+
+// ListPosts returns active guild posts of the given type, ordered by newest first.
+func (r *GuildRepository) ListPosts(guildID uint32, postType int) ([]*MessageBoardPost, error) {
+	rows, err := r.db.Queryx(
+		`SELECT id, stamp_id, title, body, author_id, created_at, liked_by
+		 FROM guild_posts WHERE guild_id = $1 AND post_type = $2 AND deleted = false
+		 ORDER BY created_at DESC`, guildID, postType)
+	if err != nil {
+		return nil, err
+	}
+	defer func() { _ = rows.Close() }()
+	var posts []*MessageBoardPost
+	for rows.Next() {
+		post := &MessageBoardPost{}
+		if err := rows.StructScan(post); err != nil {
+			continue
+		}
+		posts = append(posts, post)
+	}
+	return posts, nil
+}
+
+// CreatePost inserts a new guild post and soft-deletes excess posts beyond maxPosts.
+func (r *GuildRepository) CreatePost(guildID, authorID, stampID uint32, postType int, title, body string, maxPosts int) error {
+	tx, err := r.db.BeginTxx(context.Background(), nil)
+	if err != nil {
+		return err
+	}
+	defer func() { _ = tx.Rollback() }()
+
+	if _, err := tx.Exec(
+		`INSERT INTO guild_posts (guild_id, author_id, stamp_id, post_type, title, body) VALUES ($1, $2, $3, $4, $5, $6)`,
+		guildID, authorID, stampID, postType, title, body); err != nil {
+		return err
+	}
+	if _, err := tx.Exec(`UPDATE guild_posts SET deleted = true WHERE id IN (
+		SELECT id FROM guild_posts WHERE guild_id = $1 AND post_type = $2 AND deleted = false
+		ORDER BY created_at DESC OFFSET $3
+	)`, guildID, postType, maxPosts); err != nil {
+		return err
+	}
+	return tx.Commit()
+}
+
+// DeletePost soft-deletes a guild post by ID.
+func (r *GuildRepository) DeletePost(postID uint32) error {
+	_, err := r.db.Exec("UPDATE guild_posts SET deleted = true WHERE id = $1", postID)
+	return err
+}
+
+// UpdatePost updates the title and body of a guild post.
+func (r *GuildRepository) UpdatePost(postID uint32, title, body string) error {
+	_, err := r.db.Exec("UPDATE guild_posts SET title = $1, body = $2 WHERE id = $3", title, body, postID)
+	return err
+}
+
+// UpdatePostStamp updates the stamp of a guild post.
+func (r *GuildRepository) UpdatePostStamp(postID, stampID uint32) error {
+	_, err := r.db.Exec("UPDATE guild_posts SET stamp_id = $1 WHERE id = $2", stampID, postID)
+	return err
+}
+
+// GetPostLikedBy returns the liked_by CSV string for a guild post.
+func (r *GuildRepository) GetPostLikedBy(postID uint32) (string, error) {
+	var likedBy string
+	err := r.db.QueryRow("SELECT liked_by FROM guild_posts WHERE id = $1", postID).Scan(&likedBy)
+	return likedBy, err
+}
+
+// SetPostLikedBy updates the liked_by CSV string for a guild post.
+func (r *GuildRepository) SetPostLikedBy(postID uint32, likedBy string) error {
+	_, err := r.db.Exec("UPDATE guild_posts SET liked_by = $1 WHERE id = $2", likedBy, postID)
+	return err
+}
+
+// CountNewPosts returns the count of non-deleted posts created after the given time.
+func (r *GuildRepository) CountNewPosts(guildID uint32, since time.Time) (int, error) {
+	var count int
+	err := r.db.QueryRow(
+		`SELECT COUNT(*) FROM guild_posts WHERE guild_id = $1 AND deleted = false AND (EXTRACT(epoch FROM created_at)::int) > $2`,
+		guildID, since.Unix()).Scan(&count)
+	return count, err
+}