feat(CalendarView): merge recurring training slots and enhance event filtering

- Implemented a new method to merge recurring training slots with identical weekdays and time windows, improving calendar event management.
- Updated event filtering logic to exclude cancelled training sessions, ensuring only relevant training events are displayed.
- Enhanced the loading process to handle source errors more effectively, improving user experience in the CalendarView.

mobile-app/shared/src/commonMain/kotlin/de/tt_tagebuch/shared/api/ClickTtAccountApi.kt

@@ -0,0 +1,49 @@
+package de.tt_tagebuch.shared.api
+
+import de.tt_tagebuch.shared.api.http.AuthedHttpClient
+import de.tt_tagebuch.shared.api.models.ClickTtAccountEnvelope
+import de.tt_tagebuch.shared.api.models.ClickTtAccountSaveResponse
+import de.tt_tagebuch.shared.api.models.ClickTtAccountStatusDto
+import de.tt_tagebuch.shared.api.models.ClickTtAccountUpsertBody
+import de.tt_tagebuch.shared.api.models.ClickTtVerifyBody
+import de.tt_tagebuch.shared.api.models.ClickTtVerifyResponseDto
+import io.ktor.client.call.body
+import io.ktor.client.request.delete
+import io.ktor.client.request.get
+import io.ktor.client.request.post
+import io.ktor.client.request.setBody
+import io.ktor.http.ContentType
+import io.ktor.http.contentType
+import kotlinx.serialization.json.JsonObject
+
+class ClickTtAccountApi(
+    private val client: AuthedHttpClient,
+) {
+    suspend fun getAccount(): ClickTtAccountEnvelope =
+        client.http.get("/api/clicktt-account/account").body()
+
+    suspend fun getStatus(): ClickTtAccountStatusDto =
+        client.http.get("/api/clicktt-account/status").body()
+
+    suspend fun upsertAccount(body: ClickTtAccountUpsertBody): ClickTtAccountSaveResponse =
+        client.http.post("/api/clicktt-account/account") {
+            contentType(ContentType.Application.Json)
+            setBody(body)
+        }.body()
+
+    suspend fun verifyLogin(password: String? = null): ClickTtVerifyResponseDto =
+        client.http.post("/api/clicktt-account/verify") {
+            contentType(ContentType.Application.Json)
+            setBody(
+                if (password != null) {
+                    ClickTtVerifyBody(password = password)
+                } else {
+                    JsonObject(emptyMap())
+                },
+            )
+        }.body()
+
+    suspend fun deleteAccount() {
+        client.http.delete("/api/clicktt-account/account")
+    }
+}

mobile-app/shared/src/commonMain/kotlin/de/tt_tagebuch/shared/api/MyTischtennisApi.kt

@@ -0,0 +1,49 @@
+package de.tt_tagebuch.shared.api
+
+import de.tt_tagebuch.shared.api.http.AuthedHttpClient
+import de.tt_tagebuch.shared.api.models.MyTischtennisAccountEnvelope
+import de.tt_tagebuch.shared.api.models.MyTischtennisAccountSaveResponse
+import de.tt_tagebuch.shared.api.models.MyTischtennisAccountUpsertBody
+import de.tt_tagebuch.shared.api.models.MyTischtennisStatusDto
+import de.tt_tagebuch.shared.api.models.MyTischtennisVerifyBody
+import de.tt_tagebuch.shared.api.models.MyTischtennisVerifyResponseDto
+import io.ktor.client.call.body
+import io.ktor.client.request.delete
+import io.ktor.client.request.get
+import io.ktor.client.request.post
+import io.ktor.client.request.setBody
+import io.ktor.http.ContentType
+import io.ktor.http.contentType
+import kotlinx.serialization.json.JsonObject
+
+class MyTischtennisApi(
+    private val client: AuthedHttpClient,
+) {
+    suspend fun getAccount(): MyTischtennisAccountEnvelope =
+        client.http.get("/api/mytischtennis/account").body()
+
+    suspend fun getStatus(): MyTischtennisStatusDto =
+        client.http.get("/api/mytischtennis/status").body()
+
+    suspend fun upsertAccount(body: MyTischtennisAccountUpsertBody): MyTischtennisAccountSaveResponse =
+        client.http.post("/api/mytischtennis/account") {
+            contentType(ContentType.Application.Json)
+            setBody(body)
+        }.body()
+
+    suspend fun verifyLogin(password: String? = null): MyTischtennisVerifyResponseDto =
+        client.http.post("/api/mytischtennis/verify") {
+            contentType(ContentType.Application.Json)
+            setBody(
+                if (password != null) {
+                    MyTischtennisVerifyBody(password = password)
+                } else {
+                    JsonObject(emptyMap())
+                },
+            )
+        }.body()
+
+    suspend fun deleteAccount() {
+        client.http.delete("/api/mytischtennis/account")
+    }
+}

mobile-app/shared/src/commonMain/kotlin/de/tt_tagebuch/shared/api/models/IntegrationAccountDtos.kt

@@ -0,0 +1,118 @@
+package de.tt_tagebuch.shared.api.models
+
+import kotlinx.serialization.Serializable
+
+@Serializable
+data class MyTischtennisAccountDto(
+    val id: Int? = null,
+    val userId: Int? = null,
+    val email: String? = null,
+    val savePassword: Boolean? = null,
+    val autoUpdateRatings: Boolean? = null,
+    val lastLoginAttempt: String? = null,
+    val lastLoginSuccess: String? = null,
+    val lastUpdateRatings: String? = null,
+    val expiresAt: Long? = null,
+    val clubId: String? = null,
+    val clubName: String? = null,
+    val fedNickname: String? = null,
+    val createdAt: String? = null,
+    val updatedAt: String? = null,
+)
+
+@Serializable
+data class MyTischtennisAccountEnvelope(
+    val account: MyTischtennisAccountDto? = null,
+)
+
+@Serializable
+data class MyTischtennisStatusDto(
+    val exists: Boolean = false,
+    val hasEmail: Boolean = false,
+    val hasPassword: Boolean = false,
+    val hasValidSession: Boolean = false,
+    val needsConfiguration: Boolean = false,
+    val needsPassword: Boolean = false,
+)
+
+@Serializable
+data class MyTischtennisAccountUpsertBody(
+    val email: String,
+    val password: String? = null,
+    val savePassword: Boolean = false,
+    val autoUpdateRatings: Boolean = false,
+    val userPassword: String? = null,
+)
+
+@Serializable
+data class MyTischtennisVerifyBody(
+    val password: String? = null,
+)
+
+@Serializable
+data class MyTischtennisVerifyResponseDto(
+    val message: String? = null,
+    val success: Boolean? = null,
+    val accessToken: String? = null,
+    val expiresAt: Long? = null,
+    val clubId: String? = null,
+    val clubName: String? = null,
+)
+
+@Serializable
+data class MyTischtennisAccountSaveResponse(
+    val message: String? = null,
+    val account: MyTischtennisAccountDto? = null,
+)
+
+@Serializable
+data class ClickTtAccountDto(
+    val id: Int? = null,
+    val userId: Int? = null,
+    val username: String? = null,
+    val savePassword: Boolean? = null,
+    val lastLoginAttempt: String? = null,
+    val lastLoginSuccess: String? = null,
+    val createdAt: String? = null,
+    val updatedAt: String? = null,
+)
+
+@Serializable
+data class ClickTtAccountEnvelope(
+    val account: ClickTtAccountDto? = null,
+)
+
+@Serializable
+data class ClickTtAccountStatusDto(
+    val exists: Boolean = false,
+    val hasUsername: Boolean = false,
+    val hasPassword: Boolean = false,
+    val hasValidSession: Boolean = false,
+    val needsConfiguration: Boolean = false,
+    val needsPassword: Boolean = false,
+)
+
+@Serializable
+data class ClickTtAccountUpsertBody(
+    val username: String,
+    val password: String? = null,
+    val savePassword: Boolean = false,
+    val userPassword: String? = null,
+)
+
+@Serializable
+data class ClickTtVerifyBody(
+    val password: String? = null,
+)
+
+@Serializable
+data class ClickTtAccountSaveResponse(
+    val message: String? = null,
+    val account: ClickTtAccountDto? = null,
+)
+
+@Serializable
+data class ClickTtVerifyResponseDto(
+    val success: Boolean? = null,
+    val message: String? = null,
+)