feat(fonts): 字体三轨预分片自托管接入

- lxgw-wenkai-screen-webfont + @fontsource/noto-sans-sc(400/500/700)
  + @fontsource/jetbrains-mono(400/700)，均 OFL
- unicode-range 按需加载 + font-display swap；家族名与 tokens 栈首一致
- 教训：包 css 不能经 .css 文件 ESM import，须组件 frontmatter 持有

验证: pnpm astro build exit 0；dist woff2 分片 399 个（>50 门槛）

Spec: 2026-10-24_add-blog-skeleton
Co-authored-by: GLM-5.3

pnpm-lock.yaml

@@ -8,9 +8,18 @@ importers:
 
   .:
     dependencies:
+      '@fontsource/jetbrains-mono':
+        specifier: ^5.3.0
+        version: 5.3.0
+      '@fontsource/noto-sans-sc':
+        specifier: ^5.3.1
+        version: 5.3.1
       astro:
         specifier: ^7.3.8
         version: 7.3.8(yaml@2.9.1)
+      lxgw-wenkai-screen-webfont:
+        specifier: ^1.7.0
+        version: 1.7.0
 
 packages:
 
@@ -195,6 +204,12 @@ packages:
   '@emnapi/wasi-threads@1.2.3':
     resolution: {integrity: sha512-ELEBe8PsLvvJ6QMr0zLt8ffvOHW/dc1m3CEzNMg7aJUv3bMaoDtw2TXyDAwkYBuroxxuHEwhRTLJSe5sya547g==}
 
+  '@fontsource/jetbrains-mono@5.3.0':
+    resolution: {integrity: sha512-fqDfB5I9f1p1TV486aUgB9t8zP84P0O1FtQR5Ol9vjwPy+S+EIGlVYm1cvj2W5shcZMTg2nZFdVMoH5wFu8a1A==}
+
+  '@fontsource/noto-sans-sc@5.3.1':
+    resolution: {integrity: sha512-YxZ/VWAWo9FWzH08Q6fGTzIW6vYNP2TMhUFCnfhlimbhdXnWrxJLrzX3KWt2FKnV0s8XiM5vjpGHQiyFRlTj0w==}
+
   '@img/colour@1.1.0':
     resolution: {integrity: sha512-Td76q7j57o/tLVdgS746cYARfSyxk8iEfRxewL9h4OMzYhbW4TAcppl0mT4eyqXddh6L/jwoM75mo7ixa/pCeQ==}
     engines: {node: '>=18'}
@@ -830,6 +845,9 @@ packages:
     resolution: {integrity: sha512-U4N8FgzmWxc8k1VH8Kr6lQg18U7Fjvby6wXHVRX/ZZ7IwWbRMgrRbP0Wrb5q5NVinryp4SQampHKdvtecItxUg==}
     engines: {node: 20 || >=22}
 
+  lxgw-wenkai-screen-webfont@1.7.0:
+    resolution: {integrity: sha512-xvfF4V26Mb335xKg3uxljz+V2nq4F5ek0ku9pmyKgT0Dzo/d2rHi7WpnqgvM9mlXAcAKOrxrcDmUZiIs/ZQ9bQ==}
+
   magic-string@1.4.3:
     resolution: {integrity: sha512-z12OxmaPGE0F4xlpGdjuAUckipLpQlTAuAmyGhNoD7ODpYUzvDfvtxUbjM/jwznyP178oju/KDdyi220wNJ0RQ==}
 
@@ -1400,6 +1418,10 @@ snapshots:
       tslib: 2.8.1
     optional: true
 
+  '@fontsource/jetbrains-mono@5.3.0': {}
+
+  '@fontsource/noto-sans-sc@5.3.1': {}
+
   '@img/colour@1.1.0':
     optional: true
 
@@ -1973,6 +1995,8 @@ snapshots:
 
   lru-cache@11.5.3: {}
 
+  lxgw-wenkai-screen-webfont@1.7.0: {}
+
   magic-string@1.4.3:
     dependencies:
       '@jridgewell/sourcemap-codec': 1.6.0