fix(energy): deliver prototype-aligned hydrogen board and acceptance fixes

Co-authored-by: HiFox Agent <agents-noreply@hifox.com>

src/server/hydrogen-read-only.test.ts

@@ -0,0 +1,18 @@
+import assert from 'node:assert/strict';
+import test from 'node:test';
+import { assertHydrogenReadOnlySql } from './hydrogen-read-only.js';
+
+test('只读模式允许查询语句', () => {
+  for (const sql of ['SELECT 1', ' SHOW TABLES', 'WITH rows AS (SELECT 1) SELECT * FROM rows', 'EXPLAIN SELECT 1']) {
+    assert.doesNotThrow(() => assertHydrogenReadOnlySql(sql, true));
+  }
+});
+
+test('只读模式拒绝数据库写入语句', () => {
+  for (const sql of ['INSERT INTO ledger VALUES (1)', 'UPDATE ledger SET value = 1', 'DELETE FROM ledger', 'ALTER TABLE ledger ADD value INT']) {
+    assert.throws(
+      () => assertHydrogenReadOnlySql(sql, true),
+      /HYDROGEN_DB_READ_ONLY blocks non-read SQL/,
+    );
+  }
+});