fix(be): Update imports and remove unused dependencies

- Fix wildcard imports in AiChatController
- Update WeatherApiClientTest imports
- Remove unused WeatherService dependency from AiChatController

🤖 Generated with [Claude Code](https://claude.com/claude-code)

Co-Authored-By: Claude <[email protected]>

Author: JIWONKIMS

src/main/kotlin/com/back/koreaTravelGuide/domain/ai/aiChat/controller/AiChatController.kt

@@ -8,7 +8,6 @@ import com.back.koreaTravelGuide.domain.ai.aiChat.dto.SessionsResponse
 import com.back.koreaTravelGuide.domain.ai.aiChat.dto.UpdateSessionTitleRequest
 import com.back.koreaTravelGuide.domain.ai.aiChat.dto.UpdateSessionTitleResponse
 import com.back.koreaTravelGuide.domain.ai.aiChat.service.AiChatService
-import com.back.koreaTravelGuide.domain.ai.weather.service.WeatherService
 import org.springframework.http.ResponseEntity
 import org.springframework.web.bind.annotation.DeleteMapping
 import org.springframework.web.bind.annotation.GetMapping
@@ -24,7 +23,6 @@ import org.springframework.web.bind.annotation.RestController
 @RequestMapping("/api/aichat")
 class AiChatController(
     private val aiChatService: AiChatService,
-    private val weatherService: WeatherService,
 ) {
     @GetMapping("/sessions")
     fun getSessions(

src/test/kotlin/com/back/koreaTravelGuide/domain/ai/weather/client/WeatherApiClientTest.kt

@@ -1,6 +1,5 @@
-package com.back.koreaTravelGuide.domain.ai.weather.client
-
 import com.back.koreaTravelGuide.KoreaTravelGuideApplication
+import com.back.koreaTravelGuide.domain.ai.weather.client.WeatherApiClient
 import org.assertj.core.api.Assertions.assertThat
 import org.junit.jupiter.api.Assumptions.assumeTrue
 import org.junit.jupiter.api.DisplayName