Try 4

_site/index.html

@@ -0,0 +1,12 @@
+<script
+  type="module"
+  src="https://unpkg.com/esp-web-tools@9/dist/web/install-button.js?module"
+></script>
+
+<esp-web-install-button
+  manifest="https://firmware.esphome.io/esphome-web/manifest.json"
+></esp-web-install-button>
+
+<esp-web-install-button
+  manifest="https://firmware.esphome.io/esphome-web/manifest.json"
+></esp-web-install-button>

_site/manifest.json

@@ -0,0 +1,27 @@
+{
+    "name": "CYD-Klipper-Display",
+    "new_install_prompt_erase": false,
+    "builds": [
+        {
+            "chipFamily": "ESP32",
+            "parts": [
+                {
+                    "path": "output/bootloader.bin",
+                    "offset": 4096
+                },
+                {
+                    "path": "output/partitions.bin",
+                    "offset": 32768
+                },
+                {
+                    "path": "output/boot_app0.bin",
+                    "offset": 57344
+                },
+                {
+                    "path": "output/firmware.bin",
+                    "offset": 65536
+                }
+            ]
+        }
+    ]
+}

_site/manifest_wipe.json

@@ -0,0 +1,10 @@
+{
+    "name": "CYD-Klipper-Display",
+    "new_install_prompt_erase": false,
+    "builds": [
+        {
+            "path": "output/merged-firmware.bin",
+            "offset": 0
+        }
+    ]
+}