docs: README/site 全量同步 v0.6.1（版本徽章/套件数/残留 IndexedDB 描述清理/OPFSEngine 列移除/v0.6.1 里程碑/级联环与原子事务特性）
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<!-- Hero -->
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<section class="hero">
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<div class="container">
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<div class="badge" style="margin-bottom:24px;"><span class="dot"></span> v0.6.0 完全移除 IndexedDB — 1049测试 64套件 · 自研 KVStore 事务引擎 · 多 key 原子写 · 崩溃恢复 · 旧库一键迁移</div>
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<div class="badge" style="margin-bottom:24px;"><span class="dot"></span> v0.6.1 生产可用性硬化 — 1049测试 65套件 · 自研 KVStore 事务引擎 · 多 key 原子写 · 级联环保护 · 崩溃恢复 · 旧库一键迁移</div>
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<h1>前端的 <span class="gradient-text">SQL 数据库</span></h1>
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<p>TypeScript 原生构建，5 种存储引擎，支持完整 SQL 查询。<br>零运行时依赖，开箱即用。AriaEngine 自研引擎：LSM-Tree + WAL 同步 + MVCC。</p>
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<div class="actions">
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@@ -234,7 +234,7 @@ npm install @metona-team/metona-sqlark
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<div class="feature-card">
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<div class="icon">🧠</div>
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<h3>5 种存储引擎</h3>
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<p>Memory / IndexedDB / OPFS / Hybrid / <strong>AriaEngine</strong>。Aria 是自研 LSM-Tree 页面式引擎，支持 WAL 同步崩溃恢复和 MVCC 事务隔离。</p>
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<p>Memory / KVStore / OPFS / Hybrid / <strong>AriaEngine</strong>。Aria 是自研 LSM-Tree 页面式引擎，支持 WAL 同步崩溃恢复和 MVCC 事务隔离。</p>
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</div>
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<div class="feature-card">
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<div class="icon">⚡</div>
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@@ -243,13 +243,13 @@ npm install @metona-team/metona-sqlark
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</div>
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<div class="feature-card">
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<div class="icon">🌲</div>
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<h3>AriaEngine <span style="font-size:0.65rem;color:var(--accent);vertical-align:super;">v0.6.0</span></h3>
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<h3>AriaEngine <span style="font-size:0.65rem;color:var(--accent);vertical-align:super;">v0.6.1</span></h3>
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<p>自研 LSM-Tree 存储引擎：SSTable 4KB 页面化物理存储（BufferPool LRU）、WAL 分片文件原子写入、全库 AES-GCM 透明加密、标准 CRC-32 完整性校验、MVCC 快照隔离、二级索引跨重启恢复、ON UPDATE/DELETE 外键级联、崩溃恢复自愈。</p>
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</div>
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<div class="feature-card">
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<div class="icon">🔒</div>
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<h3>事务回滚 + MVCC</h3>
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<p>beginTransaction / commitTransaction / rollbackTransaction 三件套。失败自动回滚，Memory 快照 + IndexedDB 延迟写入 + Aria MVCC 版本链。</p>
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<p>beginTransaction / commitTransaction / rollbackTransaction 三件套。失败自动回滚，Memory 快照 + KVStore 原子日志 + Aria MVCC 版本链。</p>
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</div>
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<div class="feature-card">
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<div class="icon">🔍</div>
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@@ -269,7 +269,7 @@ npm install @metona-team/metona-sqlark
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<div class="feature-card">
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<div class="icon">🏊</div>
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<h3>连接池 + 性能优化</h3>
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<p>MetonaSqlark.connect() 单例复用。SSTableReader 二分查找统一、IndexedDB 索引利用、crypto 实例化。</p>
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<p>MetonaSqlark.connect() 单例复用。SSTableReader 二分查找统一、KVStore 内存热路径 O(1) 读、crypto 实例化。</p>
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</div>
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<div class="feature-card">
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<div class="icon">🧩</div>
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@@ -342,7 +342,7 @@ npm install @metona-team/metona-sqlark
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├──────────────────────────────────────────────────────────┤
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│ <span style="color:#34d399;">IStorageEngine</span> Interface │
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├──────────┬──────────┬──────────┬──────────┬──────────────┤
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│ <span style="color:#fbbf24;">Memory </span>│ <span style="color:#fbbf24;">IndexedDB </span>│ <span style="color:#fbbf24;">OPFS </span>│ <span style="color:#fbbf24;">Hybrid </span>│ <span style="color:#ec4899;font-weight:bold;">AriaEngine 🆕</span> │
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│ <span style="color:#fbbf24;">Memory </span>│ <span style="color:#fbbf24;">KVStore </span>│ <span style="color:#fbbf24;">OPFS </span>│ <span style="color:#fbbf24;">Hybrid </span>│ <span style="color:#ec4899;font-weight:bold;">AriaEngine 🆕</span> │
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│ Engine │ Engine │ Engine │ Engine │ LSM-Tree │
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│ (Map) │ (IDB) │ (File) │ (W-Thru) │ WAL + MVCC │
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└──────────┴──────────┴──────────┴──────────┴──────────────┘
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<span class="keyword">await</span> db.<span class="func">query</span>(<span class="string">`SELECT * FROM users
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WHERE id IN (SELECT user_id FROM orders WHERE amount > 100)`</span>);
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<span class="comment">// 连接池 — 单例复用，避免重复打开 IndexedDB</span>
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<span class="comment">// 连接池 — 单例复用，避免重复打开底层存储</span>
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<span class="keyword">const</span> db1 = <span class="keyword">await</span> <span class="func">MetonaSqlark.connect</span>({ name: <span class="string">'my-app'</span> });
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<span class="keyword">const</span> db2 = <span class="keyword">await</span> <span class="func">MetonaSqlark.connect</span>({ name: <span class="string">'my-app'</span> });
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<span class="comment">// db1 === db2（复用已有实例）</span>
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@@ -419,7 +419,7 @@ npm install @metona-team/metona-sqlark
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<div class="stat-card"><div class="num">~27KB</div><div class="label">gzip 体积</div></div>
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<div class="stat-card"><div class="num">5</div><div class="label">存储引擎</div></div>
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<div class="stat-card"><div class="num">72</div><div class="label">SQL 关键字</div></div>
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<div class="stat-card"><div class="num">64</div><div class="label">测试套件</div></div>
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<div class="stat-card"><div class="num">65</div><div class="label">测试套件</div></div>
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</div>
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</div>
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</section>
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