fix: use recency heuristic for pending tool_use and show "Now" for active sessions (#16)

When a tool_use has no matching tool_result, use a 2-minute recency
threshold to distinguish between tools currently executing (Working)
and tools genuinely waiting for user approval (Needs Input). Also
display "Now" instead of elapsed time for Working sessions in both
the terminal UI and web dashboard.

Fixes #14

Author: yepzdk

internal/session/session.go

@@ -741,8 +741,14 @@ func determineStatus(entries []LogEntry, isRunning bool) (Status, string, bool)
 		}
 	}
 
-	// If there's a pending tool_use, session is waiting for input (not ghost/idle)
+	// If there's a pending tool_use, check recency to decide status.
+	// Many tools (Task, Read, Grep, Write, Edit, etc.) are auto-approved and
+	// execute without user interaction. A recent pending tool_use likely means
+	// the tool is currently executing, not waiting for approval.
 	if hasPendingToolUse {
+		if lastAssistant != nil && time.Since(lastAssistant.Timestamp) < 2*time.Minute {
+			return StatusWorking, "Using: " + pendingToolName, false
+		}
 		return StatusNeedsInput, "Using: " + pendingToolName, false
 	}
 

internal/ui/ui.go

@@ -314,13 +314,16 @@ func formatContext(s session.Session, width int) string {
 // The main row shows status, project, context, and activity.
 // A second indented line shows the last message using the full width.
 func renderSessionRow(s session.Session, l sessionLayout, nl string) {
-	elapsed := formatElapsed(time.Since(s.LastActivity))
+	activity := formatElapsed(time.Since(s.LastActivity))
+	if s.Status == session.StatusWorking {
+		activity = "Now"
+	}
 
 	row := fmt.Sprintf("%s %s %s %-*s",
 		formatStatus(s.Status, l.status),
 		formatProject(s, l.project),
 		formatContext(s, l.context),
-		l.activity, elapsed)
+		l.activity, activity)
 	fmt.Print(row + nl)
 
 	// Second line: last message aligned with status text (after "● ")

internal/web/static/app.js

@@ -90,7 +90,7 @@
         sessionsList.innerHTML = currentSessions.map(s => {
             const cls = statusClass(s.status);
             const symbol = statusSymbol(s.status);
-            const age = formatAge(s.last_activity);
+            const age = s.status === 'Working' ? 'Now' : formatAge(s.last_activity);
             const pct = s.context_percent || 0;
             const ctxCls = pct > 90 ? 'high' : pct > 75 ? 'medium' : 'low';