fix: complete traces on idle, improve dashboard span/event/analytics views

packages/opencode-plugin/src/state.ts

@@ -111,11 +111,16 @@ export class SessionState {
       metadata: safeJsonValue({ ...toolMeta, rawMetadata: metadata }),
     });
 
+    const reasoningText =
+      title !== call.tool && title
+        ? `Selected ${call.tool}: ${title}`
+        : `Selected tool: ${call.tool}`;
+
     trace.addDecision({
       type: DecisionType.TOOL_SELECTION,
       chosen: call.tool as JsonValue,
       alternatives: [],
-      reasoning: title,
+      reasoning: reasoningText,
       durationMs,
       parentSpanId: rootSpanId,
     });
@@ -186,17 +191,29 @@ export class SessionState {
     return Array.from(this.traces.keys());
   }
 
-  /**
-   * Send the current trace state without ending the session.
-   * This creates a snapshot so data isn't lost if the process exits unexpectedly.
-   */
   flushSession(sessionId: string): void {
     const trace = this.traces.get(sessionId);
     if (!trace) return;
 
+    const rootSpanId = this.rootSpans.get(sessionId);
+    if (rootSpanId) {
+      trace.addSpan({
+        id: rootSpanId,
+        name: "session",
+        type: SpanType.AGENT,
+        status: SpanStatus.COMPLETED,
+        endedAt: nowISO(),
+      });
+    }
+
+    trace.end({ status: "COMPLETED" });
+
     const transport = getClient();
     if (transport) {
       transport.add(trace.toPayload());
     }
+
+    this.traces.delete(sessionId);
+    this.rootSpans.delete(sessionId);
   }
 }