feat(workspace): tabula-rasa outliner architecture, SQLite blocks/block_tags schema & echo-protected live room sync

internal/domain/models.go

@@ -260,13 +260,47 @@ type SystemSettings struct {
 }
 
 type DocumentBlock struct {
-	ID        string `json:"id"`
-	Type      string `json:"type"` // h1 | h2 | h3 | paragraph | todo | bullet | code | callout | divider | table | progress
-	Content   string `json:"content"`
-	Checked   bool   `json:"checked,omitempty"`
-	Lang      string `json:"lang,omitempty"`
-	Level     int    `json:"level,omitempty"`
-	Collapsed bool   `json:"collapsed,omitempty"`
+	ID         string  `json:"id"`
+	DocumentID string  `json:"documentId,omitempty"`
+	Type       string  `json:"type"` // h1 | h2 | h3 | paragraph | todo | bullet | code | callout | divider | table | progress
+	Content    string  `json:"content"`
+	Checked    bool    `json:"checked,omitempty"`
+	Lang       string  `json:"lang,omitempty"`
+	Level      int     `json:"level"`
+	Position   float64 `json:"position"`
+	Collapsed  bool    `json:"collapsed,omitempty"`
+}
+
+func CompileBlocksToMarkdown(blocks []DocumentBlock) string {
+	var sb strings.Builder
+	for _, b := range blocks {
+		lvl := b.Level
+		if lvl < 0 {
+			lvl = 0
+		}
+		indent := strings.Repeat("  ", lvl)
+		switch b.Type {
+		case "h1":
+			sb.WriteString(indent + "- # " + b.Content + "\n")
+		case "h2":
+			sb.WriteString(indent + "- ## " + b.Content + "\n")
+		case "h3":
+			sb.WriteString(indent + "- ### " + b.Content + "\n")
+		case "todo":
+			mark := "[ ]"
+			if b.Checked {
+				mark = "[x]"
+			}
+			sb.WriteString(indent + "- " + mark + " " + b.Content + "\n")
+		case "code":
+			sb.WriteString(indent + "- ```" + b.Lang + "\n" + b.Content + "\n" + indent + "  ```\n")
+		case "divider":
+			sb.WriteString(indent + "- ---\n")
+		default:
+			sb.WriteString(indent + "- " + b.Content + "\n")
+		}
+	}
+	return sb.String()
 }
 
 type DocBlocksPatchRequest struct {
@@ -310,19 +344,21 @@ type DocLockInfo struct {
 }
 
 type Document struct {
-	ID         string          `json:"id"`
-	UserID     string          `json:"userId"`
-	SpaceID    string          `json:"spaceId,omitempty"`
-	Title      string          `json:"title"`
-	Icon       string          `json:"icon"`
-	Content    string          `json:"content"`
-	Blocks     []DocumentBlock `json:"blocks"`
-	Tags       []string        `json:"tags"`
-	FolderPath string          `json:"folderPath,omitempty"`
-	IsPinned   bool            `json:"isPinned"`
-	IsArchived bool            `json:"isArchived"`
-	CreatedAt  string          `json:"createdAt"`
-	UpdatedAt  string          `json:"updatedAt"`
+	ID            string          `json:"id"`
+	UserID        string          `json:"userId"`
+	SpaceID       string          `json:"spaceId,omitempty"`
+	Title         string          `json:"title"`
+	Icon          string          `json:"icon"`
+	Content       string          `json:"content"`
+	MarkdownCache string          `json:"markdownCache,omitempty"`
+	Blocks        []DocumentBlock `json:"blocks"`
+	Tags          []string        `json:"tags"`
+	FolderID      string          `json:"folderId,omitempty"`
+	FolderPath    string          `json:"folderPath,omitempty"`
+	IsPinned      bool            `json:"isPinned"`
+	IsArchived    bool            `json:"isArchived"`
+	CreatedAt     string          `json:"createdAt"`
+	UpdatedAt     string          `json:"updatedAt"`
 
 	// Collaboration & Permissions
 	Permission       string     `json:"permission"` // owner | write | read