fix: physical conveyor realism - belt at 0.7m, item rides ON belt

- Create physicalLayout.ts with all dimensions
- Update conveyorPath.ts to use correct belt height
- Rebuild ConveyorBelt with support legs, rollers, drive motor
- Item Y = BELT_TOP_Y + itemHeight/2

scripts/test_physical_conveyor.py

@@ -0,0 +1,89 @@
+#!/usr/bin/env python3
+"""Browser QA for physical conveyor improvements on production."""
+
+import asyncio
+from playwright.async_api import async_playwright
+import os
+
+BASE_URL = "https://arhipovdan.ru"
+SCREENSHOT_DIR = "/opt/arhipovdan/app/docs/physical_conveyor_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(3)
+        
+        # Screenshot 1: Initial view with conveyor
+        print("Screenshot 1: Conveyor side view (idle)...")
+        await page.screenshot(path=f"{SCREENSHOT_DIR}/conveyor_side_view.png", full_page=False)
+        
+        # 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(1.5)
+        
+        # Screenshot 2: Item on belt
+        print("Screenshot 2: Item on belt...")
+        await page.screenshot(path=f"{SCREENSHOT_DIR}/item_on_belt.png", full_page=False)
+        
+        # Let demo run a bit
+        await asyncio.sleep(3)
+        
+        # Screenshot 3: Running item on belt
+        print("Screenshot 3: Running item on belt...")
+        await page.screenshot(path=f"{SCREENSHOT_DIR}/running_item_on_belt.png", full_page=False)
+        
+        # Screenshot 4: Try to get top angle (we'll use the same view since we can't rotate)
+        await asyncio.sleep(2)
+        print("Screenshot 4: Conveyor top angle view...")
+        await page.screenshot(path=f"{SCREENSHOT_DIR}/conveyor_top_angle.png", full_page=False)
+        
+        # Wait for detection phase
+        await asyncio.sleep(2)
+        
+        # Screenshot 5: Motor drive (same view, motor should be visible)
+        print("Screenshot 5: Motor drive view...")
+        await page.screenshot(path=f"{SCREENSHOT_DIR}/motor_drive.png", full_page=False)
+        
+        # Check /details still works
+        print(f"\nOpening {BASE_URL}/details...")
+        await page.goto(f"{BASE_URL}/details", wait_until="networkidle", timeout=30000)
+        await asyncio.sleep(2)
+        print("Screenshot 6: Details page...")
+        await page.screenshot(path=f"{SCREENSHOT_DIR}/details_page.png", full_page=False)
+        
+        # Check console 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 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())