Align docs with ESP32-S3 dashboard architecture

docs/API.md

@@ -264,7 +264,7 @@ Design limits:
 - No large assets
 - No heavy JavaScript framework
 
-The embedded dashboard is intended as a convenient phone view, not a replacement for the physical Pico dashboard.
+The embedded dashboard is intended as a convenient phone view and setup interface. It does not replace the planned Waveshare ESP32-S3 physical dashboard.
 
 ---
 
@@ -637,11 +637,15 @@ Request:
     {
       "id": "relay_1",
       "state": true
-    }\n\n### Weather temperature sensor flag
+    }
+
+### Weather temperature sensor flag
 
 Temperature sensor config entries now include `weather: true`.
 
-When a configured temp sensor has `weather: true`, the WebUI may show it as the outside/weather temperature badge. The `/status` temp objects also include this flag so HTTP, UART, USB serial, and future Pico clients can identify the selected outside-air sensor without guessing from the sensor name.\n\n\n### Clear temperature assignments
+When a configured temp sensor has `weather: true`, the WebUI may show it as the outside/weather temperature badge. The `/status` temp objects also include this flag so HTTP, UART, USB serial, and dashboard clients can identify the selected outside-air sensor without guessing from the sensor name.
+
+### Clear temperature assignments
 
 `POST /temps/clear`
 
@@ -651,4 +655,4 @@ Request body options:
 - `{ "slot": 1 }` clears one logical temp slot by number.
 - Empty POST body clears all temp assignments.
 
-Clearing removes the stored DS18B20 address, disables the slot, clears the weather flag, resets cached temperature state, and persists config.\n
+Clearing removes the stored DS18B20 address, disables the slot, clears the weather flag, resets cached temperature state, and persists config.