fix(tui): add ProgressTracker to execute_scan_ports for Metrics/Network Graph

Root cause: execute_scan_ports() never published ProgressUpdate events during
the actual port scanning loop. Only ScanStarted/ScanCompleted were published,
leaving Metrics dashboard and Network Graph without real-time data.

Changes:
- Add ProgressTracker to execute_scan_ports() for real-time progress updates
- Publish ProgressUpdate events every 250ms during port scanning
- Track completed port count and calculate accurate throughput
- Enable Network Graph to receive ThroughputSamples for visualization
- Enable Metrics dashboard to show current throughput and completed count

This is Part 3 of the comprehensive TUI event flow fix series:
- Part 1: Event aggregation and progress tracking (cdad62c)
- Part 2: EventBus attachment to TCP scanner (2a051ad)
- Part 2b: Service detection, duration, Network Graph (b3776e7)
- Part 3: ProgressUpdate in execute_scan_ports (this commit)

Testing: All 276 prtip-tui tests pass, clean clippy

🤖 Generated with [Claude Code](https://claude.com/claude-code)

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

Author: doublegate

CHANGELOG.md

@@ -22,6 +22,8 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
   - **Fix:** Track scan_start_time in ScanState, set on ScanStarted event for duration calculation
   - **Fix:** Add TCP Connect scan progress tracking (was only SYN/UDP/Stealth before)
   - **Fix:** Improve Network Graph data calculations (packets_received, ports_per_second)
+  - **Root Cause 6:** execute_scan_ports() never published ProgressUpdate events during scan
+  - **Fix:** Add ProgressTracker to execute_scan_ports() for real-time Metrics/Network Graph updates
   - **Impact:** All TUI tabs now display real-time data (Port Table, Service Table, Metrics, Network Graph)
 
 ## [0.5.8] - 2025-11-27

crates/prtip-scanner/src/scheduler.rs

@@ -794,13 +794,14 @@ impl ScanScheduler {
             ports.count()
         );
 
+        // Generate scan_id for this scan (used by events and progress tracker)
+        let scan_id = Uuid::new_v4();
+
         // Publish ScanStarted event for TUI
         if let Some(ref event_bus) = self.config.scan.event_bus {
             use prtip_core::events::{ScanEvent, ScanStage};
             use std::time::SystemTime;
-            use uuid::Uuid;
 
-            let scan_id = Uuid::new_v4();
             let timestamp = SystemTime::now();
 
             event_bus
@@ -867,6 +868,10 @@ impl ScanScheduler {
         // (must be before the loop where total_ports gets shadowed)
         let total_scan_ports = total_ports;
 
+        // Create progress tracker for TUI updates (Sprint 6.8 fix)
+        // Uses same scan_id as ScanStarted event
+        let mut progress_tracker = ProgressTracker::new(scan_id, total_ports);
+
         for target in targets {
             let original_hosts = target.expand_hosts();
 
@@ -985,6 +990,13 @@ impl ScanScheduler {
                         // Wait for progress bridge to finish
                         let _ = bridge_handle.await;
 
+                        // Update progress tracker for TUI (Sprint 6.8 fix)
+                        for _ in 0..ports_vec.len() {
+                            progress_tracker
+                                .increment(&self.config.scan.event_bus)
+                                .await;
+                        }
+
                         // Push results to lock-free aggregator (zero contention!)
                         for result in results.iter() {
                             // Try to push result
@@ -1176,13 +1188,15 @@ impl ScanScheduler {
         // Complete progress bar
         progress.finish("Scan complete");
 
+        // Publish final ProgressUpdate event to ensure 100% completion (Sprint 6.8 fix)
+        progress_tracker.publish(&self.config.scan.event_bus).await;
+
         // Publish ScanCompleted event for TUI
         if let Some(ref event_bus) = self.config.scan.event_bus {
             use prtip_core::events::{ScanEvent, ScanStage};
             use std::time::{Duration, SystemTime};
-            use uuid::Uuid;
 
-            let scan_id = Uuid::new_v4();
+            // Use same scan_id as ScanStarted/ProgressUpdate events
             let timestamp = SystemTime::now();
 
             // Calculate port counts