fix(syntax): reject bare apis-container bodies and cross-mode duplicate api names

Bare bodies inside apis {} silently discarded their text with no error,
producing a do-nothing block. They now throw a ParseError naming the entry
and pointing at the response {} section. Duplicate-name detection for
dataApis moved from an incremental, order-dependent check (only saw prior
entries in the array) to a single post-parse pass over the whole ast.dataApis,
so it catches cross-mode duplicates (apis {} vs ssr { api }) regardless of
declaration order.

Co-Authored-By: Claude Opus 5 <noreply@anthropic.com>

editors/vscode/src/language-server.cjs

@@ -1,5 +1,5 @@
 #!/usr/bin/env node
-// WRN editor language server source hash: a5d091c01e106fd98dba6ef8bda030e821bf1f04ebeb63a6d12cc2d0783e93e2
+// WRN editor language server source hash: 7084da58f35fcb02c387b392d78660fa3b59f2060c765c3e982dd1918edab78a
 // WRN editor language server generator hash: f593a44aaf05495b789ce7a3086bee1eebb951b884d41c0e017bbcfe5f547e72
 // @bun @bun-cjs
 (function(exports, require, module, __filename, __dirname) {var __create = Object.create;
@@ -170869,7 +170869,6 @@ function parseApiSections(source) {
 function hasRequestSection(source) {
   return scanTopLevelBlocks(source, SECTION_NAMES).has("request");
 }
-var emptySections = { parameters: [], body: [], response: "", error: "" };
 function parseApiEntries(source) {
   const entries = [];
   const lx = new Lexer(source);
@@ -170884,13 +170883,17 @@ function parseApiEntries(source) {
     }
     const path = lx.readPath();
     const entryBody = lx.readBalancedBraces();
+    const sections = parseApiSections(entryBody);
+    if (sections === null) {
+      throw new LexError(`Api entry "${nameToken.value}" has a bare body; declare a "response { }" section instead`);
+    }
     entries.push({
       mode: "any",
       name: nameToken.value,
       method: methodToken.value.toUpperCase(),
       path,
       body: "",
-      sections: parseApiSections(entryBody) ?? emptySections
+      sections
     });
   }
   return entries;
@@ -171910,12 +171913,7 @@ function parse(source) {
         case "apis": {
           lx.next();
           const body = lx.readBalancedBraces();
-          for (const entry of parseApiEntries(body)) {
-            if (dataApis.some((block) => block.name === entry.name)) {
-              throw new ParseError(`Duplicate api entry "${entry.name}" in apis block`);
-            }
-            dataApis.push(entry);
-          }
+          dataApis.push(...parseApiEntries(body));
           break;
         }
         default:
@@ -171987,6 +171985,13 @@ function parse(source) {
     };
     for (const name2 of namedLoads.keys())
       visitLoad(name2);
+    const seenApiNames = new Set;
+    for (const block of dataApis) {
+      if (seenApiNames.has(block.name)) {
+        throw new ParseError(`Duplicate api entry "${block.name}"`, "WRN-API-DUPLICATE");
+      }
+      seenApiNames.add(block.name);
+    }
     return {
       type: "page",
       imports,