fix: correct Task tool description extraction for subagent window titles

- Add parseTaskDescriptionsFromTerminalData() to parse raw terminal data in
  interactive sessions (not just one-shot mode)
- Strip ANSI codes before regex matching since terminal output has embedded
  codes like [1mExplore[0m
- Fix getTaskDescriptionForSubagent() to check ALL sessions with matching
  project hash (not just the first one found) since multiple sessions can
  share the same working directory
- Add tool_result event forwarding for subagent SSE broadcasts

The pattern Explore(Description) in terminal output is now correctly parsed
and used as the subagent window title instead of extracting from the prompt.

Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>

src/web/public/styles.css

@@ -3971,6 +3971,98 @@ kbd {
   color: var(--text);
 }
 
+/* Model badges */
+.subagent-model-badge {
+  font-size: 0.55rem;
+  padding: 0.1rem 0.35rem;
+  border-radius: 4px;
+  font-weight: 600;
+  text-transform: uppercase;
+  letter-spacing: 0.3px;
+}
+
+.subagent-model-badge.haiku {
+  background: #4ade80;
+  color: #052e16;
+}
+
+.subagent-model-badge.sonnet {
+  background: #60a5fa;
+  color: #1e3a5f;
+}
+
+.subagent-model-badge.opus {
+  background: #c084fc;
+  color: #3b0764;
+}
+
+/* Hook events */
+.subagent-activity.progress.hook .icon {
+  color: #f59e0b;
+}
+
+.activity-line.hook-line .tool-icon {
+  color: #f59e0b;
+}
+
+/* Tool result activity */
+.subagent-activity.tool-result .icon {
+  color: var(--success);
+}
+
+.subagent-activity.tool-result.error .icon {
+  color: var(--red);
+}
+
+.activity-line.result-line .tool-icon {
+  color: var(--success);
+}
+
+.activity-line.result-line.error .tool-icon {
+  color: var(--red);
+}
+
+.activity-line.result-line .tool-detail {
+  color: var(--text-dim);
+  font-style: italic;
+}
+
+/* Tool params expansion */
+.tool-expand-btn {
+  background: transparent;
+  border: 1px solid var(--border);
+  border-radius: 3px;
+  color: var(--text-muted);
+  cursor: pointer;
+  font-size: 0.6rem;
+  padding: 0.1rem 0.3rem;
+  margin-left: 0.3rem;
+  transition: all 0.15s;
+}
+
+.tool-expand-btn:hover {
+  background: var(--bg-hover);
+  color: var(--text);
+}
+
+.tool-params-expanded {
+  background: var(--bg-dark);
+  border-left: 2px solid var(--accent);
+  margin: 0.3rem 0 0.3rem 2rem;
+  padding: 0.4rem 0.6rem;
+  border-radius: 0 4px 4px 0;
+  font-size: 0.65rem;
+  max-height: 150px;
+  overflow-y: auto;
+}
+
+.tool-params-expanded pre {
+  margin: 0;
+  white-space: pre-wrap;
+  word-break: break-all;
+  color: var(--text-dim);
+}
+
 /* ========== Subagent Windows (Floating) ========== */
 
 .subagent-window {