refactor: consolidate block processing logic

Introduce a centralized `block-processor` and `block-scanner` to
handle markdown fenced code blocks. This replaces the previous
`inline-blocks.ts` and individual completion sources with a unified
approach that handles block stripping, directive replacement, and
metadata extraction (stats, templates, and spark tables) in a single
pass.

src/cli/commands/serve.ts

@@ -11,7 +11,10 @@ import {
   scanCompletions,
   type CompletionsPayload,
 } from "../completions/index.js";
-import { extractInlineBlocks } from "../inline-blocks.js";
+import {
+  processBlocks,
+  type ProcessedBlocks,
+} from "../completions/block-processor.js";
 
 interface ContentIndex {
   [path: string]: string;
@@ -83,8 +86,16 @@ function getBestIP(): string {
 /**
  * 扫描目录内的 .md 文件，生成索引
  */
-export function scanDirectory(dir: string): ContentIndex {
+export function scanDirectory(dir: string): {
+  index: ContentIndex;
+  blocks: ProcessedBlocks;
+} {
   const index: ContentIndex = {};
+  const blocks: ProcessedBlocks = {
+    stats: [],
+    statTemplates: [],
+    sparkTables: [],
+  };
 
   function scan(currentPath: string, relativePath: string) {
     const entries = readdirSync(currentPath);
@@ -107,12 +118,11 @@ export function scanDirectory(dir: string): ContentIndex {
         try {
           const content = readFileSync(fullPath, "utf-8");
           if (entry.endsWith(".md")) {
-            const stripped = extractInlineBlocks(
-              content,
-              normalizedRelPath,
-              index,
-            );
-            index[normalizedRelPath] = stripped;
+            const result = processBlocks(content, normalizedRelPath, index);
+            index[normalizedRelPath] = result.stripped;
+            blocks.stats.push(...result.blocks.stats);
+            blocks.statTemplates.push(...result.blocks.statTemplates);
+            blocks.sparkTables.push(...result.blocks.sparkTables);
           } else {
             index[normalizedRelPath] = content;
           }
@@ -124,7 +134,7 @@ export function scanDirectory(dir: string): ContentIndex {
   }
 
   scan(dir, "");
-  return index;
+  return { index, blocks };
 }
 
 /**
@@ -267,6 +277,11 @@ export function createContentServer(
   host: string = "0.0.0.0",
 ): ContentServer {
   let contentIndex: ContentIndex = {};
+  let collectedBlocks: ProcessedBlocks = {
+    stats: [],
+    statTemplates: [],
+    sparkTables: [],
+  };
   let completionsIndex: CompletionsPayload = {
     dice: [],
     links: [],
@@ -275,9 +290,9 @@ export function createContentServer(
     statTemplates: [],
   };
 
-  /** Re-scan completions from current content index (cached) */
+  /** Re-scan completions from current content index and collected blocks */
   function recomputeCompletions(): void {
-    completionsIndex = scanCompletions(contentIndex);
+    completionsIndex = scanCompletions(contentIndex, collectedBlocks);
     console.log(
       `[completions] dice=${completionsIndex.dice.length} links=${completionsIndex.links.length} sparkTables=${completionsIndex.sparkTables.length} stats=${completionsIndex.stats.length} templates=${completionsIndex.statTemplates.length}`,
     );
@@ -285,7 +300,9 @@ export function createContentServer(
 
   // 扫描内容目录生成索引
   console.log("扫描内容目录...");
-  contentIndex = scanDirectory(contentDir);
+  const scanResult = scanDirectory(contentDir);
+  contentIndex = scanResult.index;
+  collectedBlocks = scanResult.blocks;
   console.log(`已索引 ${Object.keys(contentIndex).length} 个文件`);
   recomputeCompletions();
 
@@ -308,12 +325,11 @@ export function createContentServer(
           const content = readFileSync(path, "utf-8");
           const relPath = "/" + relative(contentDir, path).split(sep).join("/");
           if (relPath.endsWith(".md")) {
-            const stripped = extractInlineBlocks(
-              content,
-              relPath,
-              contentIndex,
-            );
-            contentIndex[relPath] = stripped;
+            const result = processBlocks(content, relPath, contentIndex);
+            contentIndex[relPath] = result.stripped;
+            // Re-scan to get fresh blocks (simpler than per-file merge)
+            const rescan = scanDirectory(contentDir);
+            collectedBlocks = rescan.blocks;
             recomputeCompletions();
           } else {
             contentIndex[relPath] = content;
@@ -334,12 +350,10 @@ export function createContentServer(
           const content = readFileSync(path, "utf-8");
           const relPath = "/" + relative(contentDir, path).split(sep).join("/");
           if (relPath.endsWith(".md")) {
-            const stripped = extractInlineBlocks(
-              content,
-              relPath,
-              contentIndex,
-            );
-            contentIndex[relPath] = stripped;
+            const result = processBlocks(content, relPath, contentIndex);
+            contentIndex[relPath] = result.stripped;
+            const rescan = scanDirectory(contentDir);
+            collectedBlocks = rescan.blocks;
             recomputeCompletions();
           } else {
             contentIndex[relPath] = content;
@@ -359,7 +373,11 @@ export function createContentServer(
         const relPath = "/" + relative(contentDir, path).split(sep).join("/");
         delete contentIndex[relPath];
         console.log(`[删除] ${relPath}`);
-        if (relPath.endsWith(".md")) recomputeCompletions();
+        if (relPath.endsWith(".md")) {
+          const rescan = scanDirectory(contentDir);
+          collectedBlocks = rescan.blocks;
+          recomputeCompletions();
+        }
       }
     });