refactor(tor): extract TorSettings, TorType, TorPresetType to commons/commonMain

Move core Tor data models and preset logic to shared commons module:
- TorSettings data class, TorType enum, TorPresetType enum
- parseTorType, parseTorPresetType, isPreset, whichPreset functions
- All preset constants (torOnlyWhenNeededPreset, etc.)

R.string resource IDs removed from enums in commons. Android retains
resourceId/explainerId as extension properties in ui.tor package.

15 Android files updated to import from commons.tor. All 69 tests pass.

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

commons/src/commonMain/kotlin/com/vitorpamplona/amethyst/commons/tor/TorSettings.kt

@@ -0,0 +1,153 @@
+/*
+ * Copyright (c) 2025 Vitor Pamplona
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a copy of
+ * this software and associated documentation files (the "Software"), to deal in
+ * the Software without restriction, including without limitation the rights to use,
+ * copy, modify, merge, publish, distribute, sublicense, and/or sell copies of the
+ * Software, and to permit persons to whom the Software is furnished to do so,
+ * subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in all
+ * copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS
+ * FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR
+ * COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN
+ * AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
+ * WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
+ */
+package com.vitorpamplona.amethyst.commons.tor
+
+data class TorSettings(
+    val torType: TorType = TorType.INTERNAL,
+    val externalSocksPort: Int = 9050,
+    val onionRelaysViaTor: Boolean = true,
+    val dmRelaysViaTor: Boolean = true,
+    val newRelaysViaTor: Boolean = true,
+    val trustedRelaysViaTor: Boolean = false,
+    val urlPreviewsViaTor: Boolean = false,
+    val profilePicsViaTor: Boolean = false,
+    val imagesViaTor: Boolean = false,
+    val videosViaTor: Boolean = false,
+    val moneyOperationsViaTor: Boolean = false,
+    val nip05VerificationsViaTor: Boolean = false,
+    val mediaUploadsViaTor: Boolean = false,
+)
+
+enum class TorType(
+    val screenCode: Int,
+) {
+    OFF(0),
+    INTERNAL(1),
+    EXTERNAL(2),
+}
+
+fun parseTorType(code: Int?): TorType =
+    when (code) {
+        TorType.OFF.screenCode -> TorType.OFF
+        TorType.INTERNAL.screenCode -> TorType.INTERNAL
+        TorType.EXTERNAL.screenCode -> TorType.EXTERNAL
+        else -> TorType.INTERNAL
+    }
+
+enum class TorPresetType(
+    val screenCode: Int,
+) {
+    ONLY_WHEN_NEEDED(0),
+    DEFAULT(1),
+    SMALL_PAYLOADS(2),
+    FULL_PRIVACY(3),
+    CUSTOM(4),
+}
+
+fun parseTorPresetType(code: Int?): TorPresetType =
+    when (code) {
+        TorPresetType.ONLY_WHEN_NEEDED.screenCode -> TorPresetType.ONLY_WHEN_NEEDED
+        TorPresetType.DEFAULT.screenCode -> TorPresetType.DEFAULT
+        TorPresetType.SMALL_PAYLOADS.screenCode -> TorPresetType.SMALL_PAYLOADS
+        TorPresetType.FULL_PRIVACY.screenCode -> TorPresetType.FULL_PRIVACY
+        else -> TorPresetType.CUSTOM
+    }
+
+fun isPreset(
+    torSettings: TorSettings,
+    preset: TorSettings,
+): Boolean =
+    torSettings.onionRelaysViaTor == preset.onionRelaysViaTor &&
+        torSettings.dmRelaysViaTor == preset.dmRelaysViaTor &&
+        torSettings.newRelaysViaTor == preset.newRelaysViaTor &&
+        torSettings.trustedRelaysViaTor == preset.trustedRelaysViaTor &&
+        torSettings.urlPreviewsViaTor == preset.urlPreviewsViaTor &&
+        // torSettings.profilePicsViaTor == preset.profilePicsViaTor &&
+        torSettings.imagesViaTor == preset.imagesViaTor &&
+        torSettings.videosViaTor == preset.videosViaTor &&
+        torSettings.moneyOperationsViaTor == preset.moneyOperationsViaTor &&
+        torSettings.nip05VerificationsViaTor == preset.nip05VerificationsViaTor &&
+        torSettings.mediaUploadsViaTor == preset.mediaUploadsViaTor
+
+fun whichPreset(torSettings: TorSettings): TorPresetType {
+    if (isPreset(torSettings, torOnlyWhenNeededPreset)) return TorPresetType.ONLY_WHEN_NEEDED
+    if (isPreset(torSettings, torDefaultPreset)) return TorPresetType.DEFAULT
+    if (isPreset(torSettings, torSmallPayloadsPreset)) return TorPresetType.SMALL_PAYLOADS
+    if (isPreset(torSettings, torFullyPrivate)) return TorPresetType.FULL_PRIVACY
+    return TorPresetType.CUSTOM
+}
+
+val torOnlyWhenNeededPreset =
+    TorSettings(
+        onionRelaysViaTor = true,
+        dmRelaysViaTor = false,
+        newRelaysViaTor = false,
+        trustedRelaysViaTor = false,
+        urlPreviewsViaTor = false,
+        profilePicsViaTor = false,
+        imagesViaTor = false,
+        videosViaTor = false,
+        moneyOperationsViaTor = false,
+        nip05VerificationsViaTor = false,
+        mediaUploadsViaTor = false,
+    )
+val torDefaultPreset =
+    TorSettings(
+        onionRelaysViaTor = true,
+        dmRelaysViaTor = true,
+        newRelaysViaTor = true,
+        trustedRelaysViaTor = false,
+        urlPreviewsViaTor = false,
+        profilePicsViaTor = false,
+        imagesViaTor = false,
+        videosViaTor = false,
+        moneyOperationsViaTor = false,
+        nip05VerificationsViaTor = false,
+        mediaUploadsViaTor = false,
+    )
+val torSmallPayloadsPreset =
+    TorSettings(
+        onionRelaysViaTor = true,
+        dmRelaysViaTor = true,
+        newRelaysViaTor = true,
+        trustedRelaysViaTor = true,
+        urlPreviewsViaTor = true,
+        profilePicsViaTor = true,
+        imagesViaTor = false,
+        videosViaTor = false,
+        moneyOperationsViaTor = true,
+        nip05VerificationsViaTor = true,
+        mediaUploadsViaTor = false,
+    )
+val torFullyPrivate =
+    TorSettings(
+        onionRelaysViaTor = true,
+        dmRelaysViaTor = true,
+        newRelaysViaTor = true,
+        trustedRelaysViaTor = true,
+        urlPreviewsViaTor = true,
+        profilePicsViaTor = true,
+        imagesViaTor = true,
+        videosViaTor = true,
+        moneyOperationsViaTor = true,
+        nip05VerificationsViaTor = true,
+        mediaUploadsViaTor = true,
+    )