Implement complete collection persistence with database-backed survival across server restarts

• Add full multi-table schema for collections with normalized design (collections, collection_templates, collection_items, collection_item_versions)
• Implement collection detection and processing in enhancement pipeline for .insertr-add elements
• Add template extraction and storage from existing HTML children with multi-variant support
• Enable collection reconstruction from database on server restart with proper DOM rebuilding
• Extend ContentClient interface with collection operations and full database integration
• Update enhance command to use engine.DatabaseClient for collection persistence support

internal/db/sqlite/collections.sql.go

@@ -0,0 +1,199 @@
+// Code generated by sqlc. DO NOT EDIT.
+// versions:
+//   sqlc v1.30.0
+// source: collections.sql
+
+package sqlite
+
+import (
+	"context"
+)
+
+const createCollection = `-- name: CreateCollection :one
+INSERT INTO collections (id, site_id, container_html, last_edited_by)
+VALUES (?1, ?2, ?3, ?4)
+RETURNING id, site_id, container_html, created_at, updated_at, last_edited_by
+`
+
+type CreateCollectionParams struct {
+	ID            string `json:"id"`
+	SiteID        string `json:"site_id"`
+	ContainerHtml string `json:"container_html"`
+	LastEditedBy  string `json:"last_edited_by"`
+}
+
+func (q *Queries) CreateCollection(ctx context.Context, arg CreateCollectionParams) (Collection, error) {
+	row := q.db.QueryRowContext(ctx, createCollection,
+		arg.ID,
+		arg.SiteID,
+		arg.ContainerHtml,
+		arg.LastEditedBy,
+	)
+	var i Collection
+	err := row.Scan(
+		&i.ID,
+		&i.SiteID,
+		&i.ContainerHtml,
+		&i.CreatedAt,
+		&i.UpdatedAt,
+		&i.LastEditedBy,
+	)
+	return i, err
+}
+
+const deleteAllSiteCollections = `-- name: DeleteAllSiteCollections :exec
+DELETE FROM collections 
+WHERE site_id = ?1
+`
+
+func (q *Queries) DeleteAllSiteCollections(ctx context.Context, siteID string) error {
+	_, err := q.db.ExecContext(ctx, deleteAllSiteCollections, siteID)
+	return err
+}
+
+const deleteCollection = `-- name: DeleteCollection :exec
+DELETE FROM collections 
+WHERE id = ?1 AND site_id = ?2
+`
+
+type DeleteCollectionParams struct {
+	ID     string `json:"id"`
+	SiteID string `json:"site_id"`
+}
+
+func (q *Queries) DeleteCollection(ctx context.Context, arg DeleteCollectionParams) error {
+	_, err := q.db.ExecContext(ctx, deleteCollection, arg.ID, arg.SiteID)
+	return err
+}
+
+const getAllCollections = `-- name: GetAllCollections :many
+SELECT id, site_id, container_html, created_at, updated_at, last_edited_by
+FROM collections 
+WHERE site_id = ?1
+ORDER BY updated_at DESC
+`
+
+func (q *Queries) GetAllCollections(ctx context.Context, siteID string) ([]Collection, error) {
+	rows, err := q.db.QueryContext(ctx, getAllCollections, siteID)
+	if err != nil {
+		return nil, err
+	}
+	defer rows.Close()
+	var items []Collection
+	for rows.Next() {
+		var i Collection
+		if err := rows.Scan(
+			&i.ID,
+			&i.SiteID,
+			&i.ContainerHtml,
+			&i.CreatedAt,
+			&i.UpdatedAt,
+			&i.LastEditedBy,
+		); err != nil {
+			return nil, err
+		}
+		items = append(items, i)
+	}
+	if err := rows.Close(); err != nil {
+		return nil, err
+	}
+	if err := rows.Err(); err != nil {
+		return nil, err
+	}
+	return items, nil
+}
+
+const getCollection = `-- name: GetCollection :one
+
+SELECT id, site_id, container_html, created_at, updated_at, last_edited_by
+FROM collections 
+WHERE id = ?1 AND site_id = ?2
+`
+
+type GetCollectionParams struct {
+	ID     string `json:"id"`
+	SiteID string `json:"site_id"`
+}
+
+// Collections table queries
+func (q *Queries) GetCollection(ctx context.Context, arg GetCollectionParams) (Collection, error) {
+	row := q.db.QueryRowContext(ctx, getCollection, arg.ID, arg.SiteID)
+	var i Collection
+	err := row.Scan(
+		&i.ID,
+		&i.SiteID,
+		&i.ContainerHtml,
+		&i.CreatedAt,
+		&i.UpdatedAt,
+		&i.LastEditedBy,
+	)
+	return i, err
+}
+
+const updateCollection = `-- name: UpdateCollection :one
+UPDATE collections 
+SET container_html = ?1, last_edited_by = ?2
+WHERE id = ?3 AND site_id = ?4
+RETURNING id, site_id, container_html, created_at, updated_at, last_edited_by
+`
+
+type UpdateCollectionParams struct {
+	ContainerHtml string `json:"container_html"`
+	LastEditedBy  string `json:"last_edited_by"`
+	ID            string `json:"id"`
+	SiteID        string `json:"site_id"`
+}
+
+func (q *Queries) UpdateCollection(ctx context.Context, arg UpdateCollectionParams) (Collection, error) {
+	row := q.db.QueryRowContext(ctx, updateCollection,
+		arg.ContainerHtml,
+		arg.LastEditedBy,
+		arg.ID,
+		arg.SiteID,
+	)
+	var i Collection
+	err := row.Scan(
+		&i.ID,
+		&i.SiteID,
+		&i.ContainerHtml,
+		&i.CreatedAt,
+		&i.UpdatedAt,
+		&i.LastEditedBy,
+	)
+	return i, err
+}
+
+const upsertCollection = `-- name: UpsertCollection :one
+INSERT INTO collections (id, site_id, container_html, last_edited_by)
+VALUES (?1, ?2, ?3, ?4)
+ON CONFLICT(id, site_id) DO UPDATE SET
+    container_html = EXCLUDED.container_html,
+    last_edited_by = EXCLUDED.last_edited_by
+RETURNING id, site_id, container_html, created_at, updated_at, last_edited_by
+`
+
+type UpsertCollectionParams struct {
+	ID            string `json:"id"`
+	SiteID        string `json:"site_id"`
+	ContainerHtml string `json:"container_html"`
+	LastEditedBy  string `json:"last_edited_by"`
+}
+
+func (q *Queries) UpsertCollection(ctx context.Context, arg UpsertCollectionParams) (Collection, error) {
+	row := q.db.QueryRowContext(ctx, upsertCollection,
+		arg.ID,
+		arg.SiteID,
+		arg.ContainerHtml,
+		arg.LastEditedBy,
+	)
+	var i Collection
+	err := row.Scan(
+		&i.ID,
+		&i.SiteID,
+		&i.ContainerHtml,
+		&i.CreatedAt,
+		&i.UpdatedAt,
+		&i.LastEditedBy,
+	)
+	return i, err
+}