feat: engineering measurement architecture in 3D demo

- Stepper motor length measurement (step counting)
- Laser rangefinder height measurement
- Stereo camera width/shape analysis
- PLC decision logic with C-priority
- Actuator pusher animation
- Full measurement overlay with live data

scripts/test_measurement_system.py

@@ -0,0 +1,107 @@
+#!/usr/bin/env python3
+"""Browser QA for measurement system on production."""
+
+import asyncio
+from playwright.async_api import async_playwright
+import os
+
+BASE_URL = "https://arhipovdan.ru"
+SCREENSHOT_DIR = "/opt/arhipovdan/app/docs/measurement_system_screenshots"
+
+async def main():
+    os.makedirs(SCREENSHOT_DIR, exist_ok=True)
+    
+    async with async_playwright() as p:
+        browser = await p.chromium.launch(headless=True)
+        context = await browser.new_context(
+            viewport={"width": 1920, "height": 1080},
+            device_scale_factor=1.5,
+        )
+        page = await context.new_page()
+        
+        print(f"Opening {BASE_URL}...")
+        await page.goto(BASE_URL, wait_until="networkidle", timeout=30000)
+        await asyncio.sleep(2)
+        
+        # Click Play
+        play_btn = page.locator("button.play-button")
+        if await play_btn.count() > 0:
+            print("Clicking Play...")
+            await play_btn.click()
+            await asyncio.sleep(2)
+        
+        # Screenshot 1: Stepper counting (detection phase)
+        print("Screenshot 1: Stepper counting...")
+        await page.screenshot(path=f"{SCREENSHOT_DIR}/stepper_counting.png", full_page=False)
+        
+        # Wait for measurement phase
+        await asyncio.sleep(2)
+        
+        # Screenshot 2: Laser height measurement
+        print("Screenshot 2: Laser height measurement...")
+        await page.screenshot(path=f"{SCREENSHOT_DIR}/laser_height_measurement.png", full_page=False)
+        
+        # Wait for classification
+        await asyncio.sleep(2)
+        
+        # Screenshot 3: Stereo shape measurement
+        print("Screenshot 3: Stereo shape measurement...")
+        await page.screenshot(path=f"{SCREENSHOT_DIR}/stereo_shape_measurement.png", full_page=False)
+        
+        # Let demo run to routing phase
+        await asyncio.sleep(3)
+        
+        # Screenshot 4: Route command sent
+        print("Screenshot 4: Route command sent...")
+        await page.screenshot(path=f"{SCREENSHOT_DIR}/route_command_sent.png", full_page=False)
+        
+        # Wait for C-priority case (case 7)
+        print("Waiting for C-priority case...")
+        for _ in range(30):
+            await asyncio.sleep(1)
+            content = await page.content()
+            if "C priority" in content or "c_priority" in content.lower():
+                break
+        
+        # Screenshot 5: C-priority decision
+        print("Screenshot 5: C-priority decision...")
+        await page.screenshot(path=f"{SCREENSHOT_DIR}/c_priority_decision.png", full_page=False)
+        
+        # Test mobile view
+        print("Testing mobile view...")
+        await page.set_viewport_size({"width": 390, "height": 844})
+        await asyncio.sleep(1)
+        
+        # Screenshot 6: Mobile compact overlay
+        print("Screenshot 6: Mobile compact overlay...")
+        await page.screenshot(path=f"{SCREENSHOT_DIR}/mobile_compact_overlay.png", full_page=False)
+        
+        # Reset to desktop and check /details
+        await page.set_viewport_size({"width": 1920, "height": 1080})
+        print(f"\nOpening {BASE_URL}/details...")
+        await page.goto(f"{BASE_URL}/details", wait_until="networkidle", timeout=30000)
+        await asyncio.sleep(2)
+        
+        # Check for errors
+        errors = []
+        page.on("console", lambda msg: errors.append(msg.text) if msg.type == "error" else None)
+        await page.goto(BASE_URL, wait_until="networkidle", timeout=30000)
+        await asyncio.sleep(2)
+        
+        print("\n=== QA Results ===")
+        print(f"Screenshots saved to: {SCREENSHOT_DIR}/")
+        for f in sorted(os.listdir(SCREENSHOT_DIR)):
+            print(f"  - {f}")
+        
+        if errors:
+            print(f"\nConsole errors: {len(errors)}")
+            for e in errors[:5]:
+                print(f"  - {e[:100]}")
+        else:
+            print("\nNo console errors detected.")
+        
+        await browser.close()
+        print("\nBrowser QA complete!")
+
+if __name__ == "__main__":
+    asyncio.run(main())