Add TKMind platform extensions, H5/MindSpace stack, and deployment tooling.

Fork goose with custom MCP widgets, platform extensions (aider, git, web, search),
MindSpace H5 backend/frontend, Plaza/Ops UIs, and deploy scripts for tkmind.cn.

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

ui/h5/sse-billing.mjs

@@ -0,0 +1,67 @@
+import { Transform } from 'node:stream';
+
+function parseSseChunk(chunk) {
+  const events = [];
+  const blocks = chunk.split('\n\n');
+  for (const block of blocks) {
+    if (!block.trim()) continue;
+    let data;
+    for (const line of block.split('\n')) {
+      if (line.startsWith('data:')) {
+        data = line.slice(5).trim();
+      }
+    }
+    if (!data) continue;
+    try {
+      events.push(JSON.parse(data));
+    } catch {
+      // ignore malformed frames
+    }
+  }
+  return events;
+}
+
+export function createSseBillingTransform({ onFinish }) {
+  let buffer = '';
+
+  return new Transform({
+    transform(chunk, _encoding, callback) {
+      buffer += chunk.toString('utf8');
+      const parts = buffer.split('\n\n');
+      buffer = parts.pop() ?? '';
+
+      for (const block of parts) {
+        if (!block.trim()) continue;
+        let dataLine;
+        for (const line of block.split('\n')) {
+          if (line.startsWith('data:')) dataLine = line.slice(5).trim();
+        }
+        if (!dataLine) continue;
+        try {
+          const event = JSON.parse(dataLine);
+          if (event?.type === 'Finish' && event.token_state) {
+            void onFinish(event).catch(() => {});
+          }
+        } catch {
+          // ignore
+        }
+      }
+
+      callback(null, chunk);
+    },
+    flush(callback) {
+      if (buffer.trim()) {
+        for (const event of parseSseChunk(`${buffer}\n\n`)) {
+          if (event?.type === 'Finish' && event.token_state) {
+            void onFinish(event).catch(() => {});
+          }
+        }
+      }
+      callback();
+    },
+  });
+}
+
+export function appendBalanceEvent(balanceCents) {
+  return `event: balance\ndata: ${JSON.stringify({ balanceCents })}\n\n`;
+}