refactor: replace stat-parser with declare-parser

Replace the old stat-parser logic with a new declare-parser to handle
variable declarations and tag modifiers. This includes moving the
declare-parser logic to a shared location in cli/completions to avoid
duplication between the CLI and the journal component.

src/cli/commands/serve.ts

@@ -97,8 +97,8 @@ export function scanDirectory(dir: string): {
 } {
   const index: ContentIndex = {};
   const blocks: ProcessedBlocks = {
-    stats: [],
-    statTemplates: [],
+    declarations: [],
+    tagModifiers: [],
   };
   const directiveResults: DirectiveScanResult[] = [];
   const mdFiles: { content: string; relPath: string }[] = [];
@@ -127,8 +127,8 @@ export function scanDirectory(dir: string): {
           if (entry.endsWith(".md")) {
             const result = processBlocks(content, normalizedRelPath, index);
             index[normalizedRelPath] = result.stripped;
-            blocks.stats.push(...result.blocks.stats);
-            blocks.statTemplates.push(...result.blocks.statTemplates);
+            blocks.declarations.push(...result.blocks.declarations);
+            blocks.tagModifiers.push(...result.blocks.tagModifiers);
             mdFiles.push({ content: result.stripped, relPath: normalizedRelPath });
           } else {
             index[normalizedRelPath] = content;
@@ -310,23 +310,23 @@ export function createContentServer(
 ): ContentServer {
   let contentIndex: ContentIndex = {};
   let collectedBlocks: ProcessedBlocks = {
-    stats: [],
-    statTemplates: [],
+    declarations: [],
+    tagModifiers: [],
   };
   let directiveResults: DirectiveScanResult[] = [];
   let completionsIndex: CompletionsPayload = {
     dice: [],
     links: [],
     sparkTables: [],
-    stats: [],
-    statTemplates: [],
+    declarations: [],
+    tagModifiers: [],
   };
 
   /** 从当前内容索引和已收集的块重新扫描补全数据 */
   function recomputeCompletions(): void {
     completionsIndex = scanCompletions(contentIndex, collectedBlocks, directiveResults);
     console.log(
-      `[completions] dice=${completionsIndex.dice.length} links=${completionsIndex.links.length} sparkTables=${completionsIndex.sparkTables.length} stats=${completionsIndex.stats.length} templates=${completionsIndex.statTemplates.length}`,
+      `[completions] dice=${completionsIndex.dice.length} links=${completionsIndex.links.length} sparkTables=${completionsIndex.sparkTables.length} declarations=${completionsIndex.declarations.length} tagModifiers=${completionsIndex.tagModifiers.length}`,
     );
   }