Expand model tag support: add GLM-5.1, simplify Anthropic IDs, scan tags anywhere in message

- Flink update_bars debouncing
- update_bars subscription idempotency bugfix
- Price decimal correction bugfix of previous commit
- Add GLM-5.1 model tag alongside renamed GLM-5
- Use short Anthropic model IDs (sonnet/haiku/opus) instead of full version strings
- Allow @tags anywhere in message content, not just at start
- Return hasOtherContent flag instead of trimmed rest string
- Only trigger greeting stream when tag has no other content
- Update workspace knowledge base references to platform/workspace and platform/shapes
- Hierarchical knowledge base catalog
- 151 Trading Strategies knowledge base articles
- Shapes knowledge base article
- MutateShapes tool instead of workspace patch

web/src/components/ChatPanel.vue

@@ -191,8 +191,8 @@ const handleMessage = (data: WebSocketMessage) => {
 
     const newMessages: any[] = [systemMsg]
 
-    // Re-add the user's first message (content after the @Tag)
-    const userContent: string = pendingModelSwitchContent || data.rest || ''
+    // Re-add the user's first message if there was content beyond the @Tag
+    const userContent: string = (data.hasOtherContent && pendingModelSwitchContent) ? pendingModelSwitchContent : ''
     if (userContent) {
       const userMsgId = generateMessageId()
       lastSentMessageId = userMsgId
@@ -494,9 +494,9 @@ const sendMessage = async (event: any) => {
   }
 
   if (modelSwitchUser) {
-    // Model switch: store content-after-tag for model_switched handler to re-insert.
+    // Model switch: store full message content for model_switched handler to re-insert as user bubble.
     // Don't add a user message bubble now — model_switched will set up the full initial state.
-    pendingModelSwitchContent = content.replace(`@${modelSwitchUser.username}`, '').trim()
+    pendingModelSwitchContent = content
     wsManager.send(wsMessage)
     isAgentProcessing.value = true
     return