feat: 添加编译时模块开关配置

通过 sdkconfig.defaults 选择性启用/禁用模块，减少固件体积：

新增模块开关：
- CONFIG_MIMI_CHAN_TELEGRAM (默认 n)
- CONFIG_MIMI_CHAN_FEISHU (默认 y)
- CONFIG_MIMI_TOOL_WEB_SEARCH (默认 y)
- CONFIG_MIMI_TOOL_GPIO (默认 n)
- CONFIG_MIMI_WS_SERVER (默认 y)
- CONFIG_MIMI_WIFI_ONBOARD (默认 y)
- CONFIG_MIMI_OTA (默认 n)

技术实现：
- CMakeLists.txt 条件编译源文件
- 头文件使用 static inline stub
- CLI 命令和工具注册也支持条件编译

消除 Telegram 未配置时的 5 秒轮询警告日志

main/CMakeLists.txt

@@ -1,34 +1,65 @@
+# MimiClaw - CMake build configuration
+# This file is processed by ESP-IDF's CMake build system
+
+# ─── Core modules (always compiled) ────────────────────────────────────────
+set(core_srcs
+    "mimi.c"
+    "bus/message_bus.c"
+    "wifi/wifi_manager.c"
+    "llm/llm_proxy.c"
+    "llm/llm_provider.c"
+    "agent/agent_loop.c"
+    "agent/context_builder.c"
+    "memory/memory_store.c"
+    "memory/session_mgr.c"
+    "cli/serial_cli.c"
+    "proxy/http_proxy.c"
+    "cron/cron_service.c"
+    "heartbeat/heartbeat.c"
+    "tools/tool_registry.c"
+    "tools/tool_cron.c"
+    "tools/tool_get_time.c"
+    "tools/tool_set_timezone.c"
+    "tools/tool_files.c"
+    "skills/skill_loader.c"
+)
+
+# ─── Channel modules ───────────────────────────────────────────────────────
+if(CONFIG_MIMI_CHAN_TELEGRAM)
+    list(APPEND core_srcs "channels/telegram/telegram_bot.c")
+endif()
+
+if(CONFIG_MIMI_CHAN_FEISHU)
+    list(APPEND core_srcs "channels/feishu/feishu_bot.c")
+endif()
+
+# ─── Optional modules ───────────────────────────────────────────────────────
+if(CONFIG_MIMI_WS_SERVER)
+    list(APPEND core_srcs "gateway/ws_server.c")
+endif()
+
+if(CONFIG_MIMI_WIFI_ONBOARD)
+    list(APPEND core_srcs "onboard/wifi_onboard.c")
+endif()
+
+if(CONFIG_MIMI_OTA)
+    list(APPEND core_srcs "ota/ota_manager.c")
+endif()
+
+# ─── Tool modules ──────────────────────────────────────────────────────────
+if(CONFIG_MIMI_TOOL_WEB_SEARCH)
+    list(APPEND core_srcs "tools/tool_web_search.c")
+endif()
+
+if(CONFIG_MIMI_TOOL_GPIO)
+    list(APPEND core_srcs "tools/tool_gpio.c")
+    list(APPEND core_srcs "tools/gpio_policy.c")
+endif()
+
+# ─── Register component ───────────────────────────────────────────────────
 idf_component_register(
-    SRCS
-        "mimi.c"
-        "bus/message_bus.c"
-        "wifi/wifi_manager.c"
-        "channels/telegram/telegram_bot.c"
-        "channels/feishu/feishu_bot.c"
-        "llm/llm_proxy.c"
-        "llm/llm_provider.c"
-        "agent/agent_loop.c"
-        "agent/context_builder.c"
-        "memory/memory_store.c"
-        "memory/session_mgr.c"
-        "gateway/ws_server.c"
-        "cli/serial_cli.c"
-        "proxy/http_proxy.c"
-        "cron/cron_service.c"
-        "heartbeat/heartbeat.c"
-        "tools/tool_registry.c"
-        "tools/tool_cron.c"
-        "tools/tool_web_search.c"
-        "tools/tool_get_time.c"
-        "tools/tool_set_timezone.c"
-        "tools/tool_files.c"
-        "tools/tool_gpio.c"
-        "tools/gpio_policy.c"
-        "skills/skill_loader.c"
-        "onboard/wifi_onboard.c"
-        "ota/ota_manager.c"
-    INCLUDE_DIRS
-        "."
+    SRCS ${core_srcs}
+    INCLUDE_DIRS "."
     REQUIRES
         nvs_flash esp_wifi esp_netif esp_http_client esp_http_server
         esp_https_ota esp_event cjson spiffs console vfs app_update esp-tls