docs: fix Chat and Tools section accuracy in HELP.md

- Copy button appears on all messages (user + assistant), not just assistant
- Delete requires a confirm step — clarified in description
- Model tag position is below-left for assistant messages, not bottom-right
- Tool calls render as expandable per-call cards, not a single ⚡ N summary note
- help.html: default-open sections updated to Getting Started / Chat / Sessions / Model Registry

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

cortex/static/HELP.md

@@ -55,11 +55,11 @@ All settings persist in `localStorage` across page refreshes.
 - **Send:** `Ctrl+Enter` by default. Click `⌃↵` in the input controls to toggle to plain `Enter` mode.
 - **Stop:** Click **Stop** to cancel an in-progress response at any time.
 - **Edit a message:** Hover over any message → click **edit**. `Ctrl+Enter` saves, `Esc` cancels.
-- **Delete a message:** Hover over any message → click **del**. Removes from session history.
-- **Copy a response:** Hover over any assistant message → click **copy**.
+- **Delete a message:** Hover over any message → click **del**, then **confirm delete**.
+- **Copy:** Hover over any message → click **copy**.
 - **New line while typing:** `Shift+Enter` (in `Ctrl+Enter` mode) or `Shift+Enter` / Enter (in Enter mode).
 
-Each assistant response shows a small **model tag** in the bottom-right corner identifying which model and host responded.
+Each assistant response shows a small **model tag** below the message identifying which model and host responded.
 
 ---
 
@@ -72,7 +72,7 @@ The orchestrator runs a multi-step tool loop:
 1. The **orchestrator model** reasons about the request and calls tools as needed
 2. It produces an enriched summary of what it found
 3. The **responder model** (set by the active Role) receives that context and writes the final user-facing reply
-4. A `⚡ N tool calls: …` note appears below the response listing what was used
+4. Expandable tool-call cards appear above the response — click any card to see the arguments sent and the result returned
 
 The ⚡ toggle is **independent of the Role selector** — you can use any role (chat, coder, research, etc.) with or without tools. The orchestrator model is configured in **Account → Model Registry → Role Assignments → Orchestrator**.
 

cortex/static/help.html

@@ -198,7 +198,7 @@
     }
 
     // ── Load all three tabs in parallel ─────────────────────────────
-    const UI_OPEN = new Set(['Header Controls', 'Chat', 'Sessions', 'Notes']);
+    const UI_OPEN = new Set(['Getting Started', 'Chat', 'Sessions', 'Model Registry']);
 
     async function loadAll() {
       // UI Guide