feat(mindspace): add page quota grace write and local delivery guardrails.

Centralize page HTML quota checks with grace-write semantics across page
services and workspace tools, keep localhost MindSpace links clickable in
chat display, and expand Page Data/static-page skill plus local dev docs
for quota, delivery URLs, and native Aider/OpenHands tooling.

Co-authored-by: Cursor <cursoragent@cursor.com>

mindspace-workspace-sync.mjs

@@ -11,6 +11,7 @@ import { resolveAssetWorkspaceRelativePath } from './mindspace-workspace-path.mj
 import { assetInternals } from './mindspace-assets.mjs';
 import { runBasicFileScan } from './mindspace-scan.mjs';
 import { buildWorkspaceStorageKey } from './workspace-storage.mjs';
+import { assertPageWriteQuota } from './mindspace-space-quota.mjs';
 
 const SKIP_FILENAMES = new Set(['index.html', '.tkmindhints', '.goosehints', '.ls_output']);
 const SKIP_ZONE_DIR_NAMES = new Set([
@@ -186,10 +187,13 @@ export function createWorkspaceAssetSync({
       if (!space || space.status !== 'active') {
         throw Object.assign(new Error('用户空间不可用'), { code: 'space_unavailable' });
       }
-      const available =
-        asNumber(space.quota_bytes) - asNumber(space.used_bytes) - asNumber(space.reserved_bytes);
-      if (available < buffer.length) {
-        throw Object.assign(new Error('剩余空间不足'), { code: 'quota_exceeded' });
+      try {
+        assertPageWriteQuota(space, buffer.length);
+      } catch (error) {
+        throw Object.assign(new Error(error.message), {
+          code: error.code ?? 'quota_exceeded',
+          details: error.details,
+        });
       }
 
       const detectedMimeType = assetInternals.detectMimeType(buffer, file.filename);
@@ -346,10 +350,15 @@ export function createWorkspaceAssetSync({
         };
       }
       const sizeDelta = buffer.length - asNumber(currentAsset.size_bytes);
-      const available =
-        asNumber(space.quota_bytes) - asNumber(space.used_bytes) - asNumber(space.reserved_bytes);
-      if (sizeDelta > 0 && available < sizeDelta) {
-        throw Object.assign(new Error('剩余空间不足'), { code: 'quota_exceeded' });
+      if (sizeDelta > 0) {
+        try {
+          assertPageWriteQuota(space, sizeDelta);
+        } catch (error) {
+          throw Object.assign(new Error(error.message), {
+            code: error.code ?? 'quota_exceeded',
+            details: error.details,
+          });
+        }
       }
       const versionId = currentAsset.current_version_id;
       if (!versionId) {