fix: include toolName in tool_result transcript entries for Pi adapter

When tool_result entries arrive without a matching tool_call, the transcript
was showing generic 'tool' as the name. Now pl-local parses toolName from
tool_execution_end events and passes it through, so the UI can display
the actual tool name (e.g., 'bash', 'Read', 'Ls') instead of 'tool'.

ui/src/components/transcript/RunTranscriptView.tsx

@@ -400,7 +400,7 @@ export function normalizeTranscript(entries: TranscriptEntry[], streaming: boole
           type: "tool",
           ts: entry.ts,
           endTs: entry.ts,
-          name: "tool",
+          name: entry.toolName ?? "tool",
           toolUseId: entry.toolUseId,
           input: null,
           result: entry.content,