diff --git a/composeApp/src/commonMain/kotlin/ch/parano/myice/auth/AuthSettings.kt b/composeApp/src/commonMain/kotlin/ch/parano/myice/auth/AuthSettings.kt
new file mode 100644
index 0000000..e0af931
--- /dev/null
+++ b/composeApp/src/commonMain/kotlin/ch/parano/myice/auth/AuthSettings.kt
@@ -0,0 +1,35 @@
+package ch.parano.myice.auth
+
+import ch.parano.myice.network.AuthTokenHolder
+import com.russhwolf.settings.Settings
+
+class AuthSettings(private val settings: Settings) {
+
+    companion object {
+        private const val TOKEN_KEY = "access_token"
+        private const val ACCOUNT_KEY = "selected_account"
+    }
+
+    fun getStoredToken(): String? = settings.getStringOrNull(TOKEN_KEY)
+
+    fun setToken(token: String?) {
+        if (token != null) {
+            settings.putString(TOKEN_KEY, token)
+        } else {
+            settings.remove(TOKEN_KEY)
+        }
+        AuthTokenHolder.token = token
+    }
+
+    fun getStoredAccount(): String? = settings.getStringOrNull(ACCOUNT_KEY)
+
+    fun setAccount(account: String) {
+        settings.putString(ACCOUNT_KEY, account)
+    }
+
+    fun clear() {
+        settings.remove(TOKEN_KEY)
+        settings.remove(ACCOUNT_KEY)
+        AuthTokenHolder.token = null
+    }
+}
diff --git a/composeApp/src/commonMain/kotlin/ch/parano/myice/auth/OAuthClient.kt b/composeApp/src/commonMain/kotlin/ch/parano/myice/auth/OAuthClient.kt
new file mode 100644
index 0000000..07c311f
--- /dev/null
+++ b/composeApp/src/commonMain/kotlin/ch/parano/myice/auth/OAuthClient.kt
@@ -0,0 +1,5 @@
+package ch.parano.myice.auth
+
+interface OAuthClient {
+    suspend fun authenticate(loginUrl: String): String?
+}
diff --git a/composeApp/src/commonMain/kotlin/ch/parano/myice/filter/EventFilter.kt b/composeApp/src/commonMain/kotlin/ch/parano/myice/filter/EventFilter.kt
new file mode 100644
index 0000000..466bc12
--- /dev/null
+++ b/composeApp/src/commonMain/kotlin/ch/parano/myice/filter/EventFilter.kt
@@ -0,0 +1,37 @@
+package ch.parano.myice.filter
+
+import ch.parano.myice.models.Event
+
+fun extractSubgroup(name: String): String {
+    val parts = name.split(" - ")
+    return if (parts.size > 1) parts.dropLast(1).joinToString(" - ") else name
+}
+
+fun filterEvents(
+    events: List<Event>,
+    agegroup: String?,
+    subgroup: String?,
+    typeFilter: TypeFilter,
+): List<Event> = events.filter { event ->
+    val typeMatches = when (typeFilter) {
+        TypeFilter.ALL -> true
+        TypeFilter.GAMES -> event.eventType == "Jeu"
+        TypeFilter.PRACTICES -> event.eventType != "Jeu"
+    }
+    if (!typeMatches) return@filter false
+
+    if (agegroup != null && event.agegroup != agegroup) return@filter false
+
+    if (subgroup != null) {
+        val eventSubgroup = extractSubgroup(event.name)
+        if (eventSubgroup != subgroup) return@filter false
+    }
+
+    true
+}
+
+fun List<Event>.distinctAgegroups(): List<String> =
+    map { it.agegroup }.toSet().sorted()
+
+fun List<Event>.distinctSubgroups(): List<String> =
+    map { extractSubgroup(it.name) }.toSet().sorted()
diff --git a/composeApp/src/commonMain/kotlin/ch/parano/myice/filter/TypeFilter.kt b/composeApp/src/commonMain/kotlin/ch/parano/myice/filter/TypeFilter.kt
new file mode 100644
index 0000000..62d2e2d
--- /dev/null
+++ b/composeApp/src/commonMain/kotlin/ch/parano/myice/filter/TypeFilter.kt
@@ -0,0 +1,9 @@
+package ch.parano.myice.filter
+
+enum class TypeFilter {
+    ALL, GAMES, PRACTICES;
+
+    companion object {
+        val DEFAULT = GAMES
+    }
+}
diff --git a/composeApp/src/commonTest/kotlin/ch/parano/myice/filter/EventFilterTest.kt b/composeApp/src/commonTest/kotlin/ch/parano/myice/filter/EventFilterTest.kt
new file mode 100644
index 0000000..e5606bd
--- /dev/null
+++ b/composeApp/src/commonTest/kotlin/ch/parano/myice/filter/EventFilterTest.kt
@@ -0,0 +1,157 @@
+package ch.parano.myice.filter
+
+import ch.parano.myice.models.Event
+import kotlin.test.Test
+import kotlin.test.assertEquals
+
+class EventFilterTest {
+
+    private fun event(
+        id: String = "1",
+        agegroup: String = "U13 (Elite)",
+        name: String = "U13 Elite - HC Ajoie",
+        eventType: String = "Jeu",
+    ) = Event(
+        idEvent = id,
+        agegroup = agegroup,
+        name = name,
+        title = "Title",
+        opponent = "Opp",
+        place = "Place",
+        start = "2024-11-10T14:00:00",
+        end = "2024-11-10T16:15:00",
+        color = "#e4222e",
+        eventType = eventType,
+    )
+
+    @Test
+    fun testExtractSubgroupWithSeparator() {
+        assertEquals("U13 Elite", extractSubgroup("U13 Elite - HC Ajoie"))
+    }
+
+    @Test
+    fun testExtractSubgroupMultipleSeparators() {
+        assertEquals("U13 Elite - Group A", extractSubgroup("U13 Elite - Group A - HC Ajoie"))
+    }
+
+    @Test
+    fun testExtractSubgroupNoSeparator() {
+        assertEquals("U13 Elite", extractSubgroup("U13 Elite"))
+    }
+
+    @Test
+    fun testExtractSubgroupEmptyString() {
+        assertEquals("", extractSubgroup(""))
+    }
+
+    @Test
+    fun testFilterGamesOnly() {
+        val events = listOf(
+            event(id = "1", eventType = "Jeu"),
+            event(id = "2", eventType = ""),
+            event(id = "3", eventType = "Jeu"),
+        )
+        val result = filterEvents(events, agegroup = null, subgroup = null, typeFilter = TypeFilter.GAMES)
+        assertEquals(2, result.size)
+        assertEquals("1", result[0].idEvent)
+        assertEquals("3", result[1].idEvent)
+    }
+
+    @Test
+    fun testFilterPracticesOnly() {
+        val events = listOf(
+            event(id = "1", eventType = "Jeu"),
+            event(id = "2", eventType = ""),
+            event(id = "3", eventType = ""),
+        )
+        val result = filterEvents(events, agegroup = null, subgroup = null, typeFilter = TypeFilter.PRACTICES)
+        assertEquals(2, result.size)
+        assertEquals("2", result[0].idEvent)
+        assertEquals("3", result[1].idEvent)
+    }
+
+    @Test
+    fun testFilterAll() {
+        val events = listOf(
+            event(id = "1", eventType = "Jeu"),
+            event(id = "2", eventType = ""),
+        )
+        val result = filterEvents(events, agegroup = null, subgroup = null, typeFilter = TypeFilter.ALL)
+        assertEquals(2, result.size)
+    }
+
+    @Test
+    fun testFilterByAgegroup() {
+        val events = listOf(
+            event(id = "1", agegroup = "U13 (Elite)"),
+            event(id = "2", agegroup = "U15"),
+            event(id = "3", agegroup = "U13 (Elite)"),
+        )
+        val result = filterEvents(events, agegroup = "U13 (Elite)", subgroup = null, typeFilter = TypeFilter.ALL)
+        assertEquals(2, result.size)
+        assertEquals("1", result[0].idEvent)
+    }
+
+    @Test
+    fun testFilterBySubgroup() {
+        val events = listOf(
+            event(id = "1", name = "U13 Elite - HC Ajoie"),
+            event(id = "2", name = "U13 Top - HC Geneva"),
+            event(id = "3", name = "U13 Elite - HC Lausanne"),
+        )
+        val result = filterEvents(events, agegroup = null, subgroup = "U13 Elite", typeFilter = TypeFilter.ALL)
+        assertEquals(2, result.size)
+        assertEquals("1", result[0].idEvent)
+        assertEquals("3", result[1].idEvent)
+    }
+
+    @Test
+    fun testFilterCombinedAgegroupAndSubgroup() {
+        val events = listOf(
+            event(id = "1", agegroup = "U13 (Elite)", name = "U13 Elite - HC Ajoie"),
+            event(id = "2", agegroup = "U13 (Elite)", name = "U13 Top - HC Geneva"),
+            event(id = "3", agegroup = "U15", name = "U13 Elite - HC Lausanne"),
+        )
+        val result = filterEvents(events, agegroup = "U13 (Elite)", subgroup = "U13 Elite", typeFilter = TypeFilter.ALL)
+        assertEquals(1, result.size)
+        assertEquals("1", result[0].idEvent)
+    }
+
+    @Test
+    fun testFilterGamesAndAgegroup() {
+        val events = listOf(
+            event(id = "1", agegroup = "U13 (Elite)", eventType = "Jeu"),
+            event(id = "2", agegroup = "U13 (Elite)", eventType = ""),
+            event(id = "3", agegroup = "U15", eventType = "Jeu"),
+        )
+        val result = filterEvents(events, agegroup = "U13 (Elite)", subgroup = null, typeFilter = TypeFilter.GAMES)
+        assertEquals(1, result.size)
+        assertEquals("1", result[0].idEvent)
+    }
+
+    @Test
+    fun testDistinctAgegroups() {
+        val events = listOf(
+            event(agegroup = "U15"),
+            event(agegroup = "U13 (Elite)"),
+            event(agegroup = "U15"),
+        )
+        val result = events.distinctAgegroups()
+        assertEquals(2, result.size)
+        assertEquals("U13 (Elite)", result[0])
+        assertEquals("U15", result[1])
+    }
+
+    @Test
+    fun testDistinctSubgroups() {
+        val events = listOf(
+            event(name = "U13 Elite - HC Ajoie"),
+            event(name = "U13 Top - HC Geneva"),
+            event(name = "U13 Elite - HC Lausanne"),
+        )
+        val result = events.distinctSubgroups()
+        assertEquals(2, result.size)
+        assertEquals("U13 Elite", result[0])
+        assertEquals("U13 Top", result[1])
+    }
+}