Add Serial Terminal App & WebUi Theme

README.md

@@ -9,6 +9,7 @@ A modular embedded micro-OS for the ABrobot ESP32-C3 board with a 0.42" monochro
 - OLED-based app launcher and system UI
 - Single-button input handling with click, double-click, hold, and home gestures
 - USB serial/JTAG CLI for runtime system control
+- Hardware UART Serial Console bridge (TX: GPIO 21, RX: GPIO 20) with Web Terminal UI at `/serial`
 - Wi‑Fi station mode with automatic fallback to SoftAP provisioning
 - Wi‑Fi network scanning from the setup page
 - Persistent NVS Wi‑Fi credentials
@@ -24,7 +25,7 @@ d:/Projects/ESP32C3/OS/
 ├── components/
 │   ├── sys_app/             # App lifecycle and app registry
 │   ├── sys_cli/             # USB serial / JTAG shell commands
-│   ├── sys_core/            # Global status and event plumbing
+│   ├── sys_core/            # Global status, event plumbing & sys_uart driver
 │   ├── sys_gfx/             # OLED display, fonts, UI compositor, widgets
 │   ├── sys_input/           # Button input handling and gestures
 │   ├── sys_wifi/            # Wi‑Fi initialization, station/AP logic, NVS credentials
@@ -34,7 +35,8 @@ d:/Projects/ESP32C3/OS/
 │       │   └── web_server_pages.h
 │       ├── pages/
 │       │   ├── wifi.c        # Root configuration and /scan /configure handlers
-│       │   └── ota.c         # /ota firmware upload page and OTA logic
+│       │   ├── ota.c         # /ota firmware upload page and OTA logic
+│       │   └── serial.c      # /serial Web Serial Terminal and /serial/data REST API
 │       └── web_server.c      # Starts the HTTP server and registers pages
 ├── main/
 │   ├── apps/
@@ -42,6 +44,7 @@ d:/Projects/ESP32C3/OS/
 │   │   ├── app_game.c
 │   │   ├── app_settings.c
 │   │   ├── app_sysmon.c
+│   │   ├── app_serial.c
 │   │   └── apps.h
 │   ├── CMakeLists.txt
 │   ├── font_5x7.h
@@ -98,6 +101,20 @@ The web server is also started while the board is connected to Wi‑Fi so the sa
 - `/scan` — JSON network scan results
 - `/configure` — save station credentials and connect
 - `/ota` — OTA upload page and firmware update endpoint
+- `/serial` — Web Serial Terminal interface
+- `/serial/data` — Real-time streaming JSON endpoint for RX/TX delta bytes
+- `/serial/tx` — POST endpoint to transmit text or bytes over UART TX (GPIO 21)
+- `/serial/baud` — POST endpoint to dynamically change UART baud rate
+- `/serial/clear` — POST endpoint to clear the RX ring buffer
+
+---
+
+## Web Serial Terminal
+
+Connect over Wi-Fi and open `http://192.168.4.1/serial` (in SoftAP mode) or `http://<board-ip>/serial` (in station mode) to access the interactive web-based serial console:
+
+- **Pins**: TX on `GPIO 21`, RX on `GPIO 20`
+- **Features**: Live streaming terminal, color-coded RX/TX logs, auto-scroll toggle, command history (Up/Down arrow navigation), dynamic baud rate switching (9600 to 921600), macro shortcuts (`PING`, `AT`, `HELP`, etc.), and log file exporting.
 
 ---
 
@@ -169,6 +186,7 @@ esp32c3-os> help
   free        Display system heap and RAM status
   app         App management (list, launch <id>, home)
   input       Simulate button input (click, double, long, home)
+  uart        Hardware UART control (send, baud, stats, clear)
   contrast    Set OLED contrast (0-255)
   reboot      Reboot the MCU
 ```