✨feature: Scan progress and timing features

app/main.py

@@ -37,10 +37,12 @@ def home() -> FileResponse:
 
 @app.get("/api/health")
 def health() -> dict[str, Any]:
+    progress = scan_state.snapshot()
     return {
         "status": "ok",
-        "scan_running": scan_state.running,
-        "current_scan_id": scan_state.current_scan_id,
+        "scan_running": progress["running"],
+        "current_scan_id": progress["scan_id"],
+        "scan_progress": progress,
     }
 
 
@@ -66,7 +68,7 @@ def api_scans(limit: int = 20) -> list[dict]:
 def run_scan(subnet: str | None = None) -> dict[str, Any]:
     subnet = subnet or DEFAULT_SUBNET
     scan_id = create_scan(subnet)
-    if not scan_state.start(scan_id):
+    if not scan_state.start(scan_id, subnet):
         complete_scan(scan_id, "cancelled", 0, notes="Another scan was already running")
         raise HTTPException(status_code=409, detail="Scan already running")
 
@@ -74,9 +76,13 @@ def run_scan(subnet: str | None = None) -> dict[str, Any]:
         host_count = 0
         try:
             discovered = discover_hosts(subnet)
-            for host in discovered:
+            scan_state.set_total_hosts(len(discovered))
+
+            for idx, host in enumerate(discovered, start=1):
+                scan_state.set_current_host(host["ip"])
                 detailed = scan_host(host["ip"])
                 if not detailed:
+                    scan_state.update_progress(idx, host_count)
                     continue
                 host_count += 1
                 if not detailed.hostname and host.get("hostname"):
@@ -87,6 +93,7 @@ def run_scan(subnet: str | None = None) -> dict[str, Any]:
                     detailed.vendor = host["vendor"]
 
                 upsert_host(scan_id, detailed)
+                scan_state.update_progress(idx, host_count)
 
             mark_missing_devices(scan_id)
             complete_scan(scan_id, "completed", host_count)