ci: Serve firmware from runner for OTA deployment

Instead of having ESP devices download from Gitea (TLS cert issues),
the runner now serves firmware via local HTTP server and triggers
OTA with the local URL.

.gitea/workflows/lint.yml

@@ -106,30 +106,39 @@ jobs:
             -F "attachment=@get-started/csi_recv_router/build/csi_recv_router.bin" \
             "$API_URL/repos/$REPO/releases/$RELEASE_ID/assets?name=csi_recv_router.bin"
 
-          # Store release URL for OTA
-          FIRMWARE_URL="https://git.mymx.me/$REPO/releases/download/$TAG/csi_recv_router.bin"
-          echo "Firmware URL: $FIRMWARE_URL"
-          echo "$FIRMWARE_URL" > /tmp/firmware_url.txt
-
       - name: Deploy via OTA
         run: |
-          FIRMWARE_URL=$(cat /tmp/firmware_url.txt)
-          echo "Using firmware URL: $FIRMWARE_URL"
+          SENSORS="muddy-storm:192.168.129.29 amber-maple:192.168.129.30 hollow-acorn:192.168.129.31"
+          FIRMWARE_PATH="get-started/csi_recv_router/build/csi_recv_router.bin"
+          OTA_PORT=8899
 
-          # Deploy to muddy-storm
-          echo "=== Deploying to muddy-storm (192.168.129.29) ==="
-          echo "OTA $FIRMWARE_URL" | nc -u -w 2 192.168.129.29 5501 || true
-          sleep 30
+          # Get runner IP (first non-loopback interface)
+          RUNNER_IP=$(hostname -I | awk '{print $1}')
+          echo "Runner IP: $RUNNER_IP"
 
-          # Deploy to amber-maple
-          echo "=== Deploying to amber-maple (192.168.129.30) ==="
-          echo "OTA $FIRMWARE_URL" | nc -u -w 2 192.168.129.30 5501 || true
-          sleep 30
+          # Start HTTP server to serve firmware
+          cd get-started/csi_recv_router/build
+          python3 -m http.server $OTA_PORT &
+          HTTP_PID=$!
+          sleep 2
 
-          # Deploy to hollow-acorn
-          echo "=== Deploying to hollow-acorn (192.168.129.31) ==="
-          echo "OTA $FIRMWARE_URL" | nc -u -w 2 192.168.129.31 5501 || true
-          sleep 30
+          FIRMWARE_URL="http://${RUNNER_IP}:${OTA_PORT}/csi_recv_router.bin"
+          echo "Firmware URL: $FIRMWARE_URL"
+
+          # Verify server is running
+          curl -sI "http://localhost:${OTA_PORT}/csi_recv_router.bin" | head -1
+
+          # Deploy to each sensor
+          for entry in $SENSORS; do
+            NAME="${entry%%:*}"
+            IP="${entry##*:}"
+            echo "=== Deploying to $NAME ($IP) ==="
+            echo "OTA $FIRMWARE_URL" | nc -u -w 2 "$IP" 5501 || true
+            sleep 45
+          done
+
+          # Stop HTTP server
+          kill $HTTP_PID 2>/dev/null || true
 
           echo "=== Deployment complete ==="