Clear channel name on new channel tab swap

frontend/AGENTS.md

@@ -236,6 +236,12 @@ When touching cross-layer contracts, also run backend tests from repo root:
 PYTHONPATH=. uv run pytest tests/ -v
 ```
 
+## Errata & Known Non-Issues
+
+### RawPacketList always scrolls to bottom
+
+`RawPacketList` unconditionally scrolls to the latest packet on every update. This is intentional — the packet feed is a live status display, not an interactive log meant for lingering or long-term analysis. Users watching it want to see the newest packet, not hold a scroll position.
+
 ## Editing Checklist
 
 1. If API/WS payloads change, update `types.ts`, handlers, and tests.

frontend/src/components/NewMessageModal.tsx

@@ -133,7 +133,15 @@ export function NewMessageModal({
           </DialogDescription>
         </DialogHeader>
 
-        <Tabs value={tab} onValueChange={(v) => setTab(v as Tab)} className="w-full">
+        <Tabs
+          value={tab}
+          onValueChange={(v) => {
+            setTab(v as Tab);
+            setName('');
+            setError('');
+          }}
+          className="w-full"
+        >
           <TabsList className="grid w-full grid-cols-4">
             <TabsTrigger value="existing">Existing</TabsTrigger>
             <TabsTrigger value="new-contact">Contact</TabsTrigger>