provision: show output on screen via qt_shell, capture stderr

- on_start.sh runs provision through qt_shell for on-screen display
- provision_wrapper.sh redirects stderr to stdout so errors are visible
- provision.sh: SSH setup before WiFi wait, verbose echo output,
  sleep on failure so messages are readable

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

system/clearpilot/on_start.sh

@@ -7,20 +7,5 @@ bash /data/openpilot/system/clearpilot/startup_logo/set_logo.sh
 nmcli radio wifi on 2>/dev/null
 
 if [ ! -f /data/quick_boot ]; then
-    # No quick_boot flag — wait for internet connectivity (up to 30s)
-    echo "Waiting for internet connectivity (up to 30s)..."
-    for i in $(seq 1 30); do
-        if nmcli networking connectivity check 2>/dev/null | grep -q "full"; then
-            echo "Internet connectivity detected after ${i}s"
-            break
-        fi
-        sleep 1
-    done
-
-    # If online, run provision
-    if nmcli networking connectivity check 2>/dev/null | grep -q "full"; then
-        bash /data/openpilot/system/clearpilot/provision.sh
-    else
-        echo "No internet connectivity after 30s, skipping provision"
-    fi
+    /data/openpilot/system/clearpilot/tools/qt_shell "/data/openpilot/system/clearpilot/provision_wrapper.sh" --title="ClearPilot Provision"
 fi