fix(fdroid): hide Play-only ToS gate and Privacy/Child-Safety links

F-Droid distributes Amethyst as MIT-licensed free software with no
acceptable-use terms layered on top — only the Play Store build needs
a ToS-acceptance checkbox at login/signup and links to the published
Child Safety Standards.

Gates added behind `BuildConfig.FLAVOR == "play"`:

- Settings → "About & Legal" section (Privacy Policy + Child Safety
  Standards) is now Play-only; F-Droid settings no longer link to
  PRIVACY.md.
- AcceptTerms checkbox in LoginScreen and SignUpScreen is now Play-only.
- LoginViewModel.load() / clear() and SignUpViewModel pre-accept
  `acceptedTerms` on F-Droid so the login/signup button isn't disabled.

The Play build is unchanged: first-time login still requires checking
the ToS box, and the About & Legal section still surfaces the published
Child Safety Standards link required by Google Play.

amethyst/src/main/java/com/vitorpamplona/amethyst/ui/screen/loggedIn/settings/AllSettingsScreen.kt

@@ -46,6 +46,7 @@ import androidx.compose.ui.platform.LocalUriHandler
 import androidx.compose.ui.text.style.TextAlign
 import androidx.compose.ui.tooling.preview.Preview
 import androidx.compose.ui.unit.dp
+import com.vitorpamplona.amethyst.BuildConfig
 import com.vitorpamplona.amethyst.R
 import com.vitorpamplona.amethyst.commons.icons.symbols.Icon
 import com.vitorpamplona.amethyst.commons.icons.symbols.MaterialSymbols
@@ -263,30 +264,32 @@ fun AllSettingsScreen(
                 )
             }
 
-            SettingsSection(R.string.about_legal) {
-                SettingsItem(
-                    title = R.string.privacy_policy,
-                    icon = MaterialSymbols.Lock,
-                    onClick = {
-                        runCatching {
-                            uriHandler.openUri(
-                                "https://github.com/vitorpamplona/amethyst/blob/main/PRIVACY.md",
-                            )
-                        }
-                    },
-                )
-                SettingsDivider()
-                SettingsItem(
-                    title = R.string.child_safety_standards,
-                    icon = MaterialSymbols.Shield,
-                    onClick = {
-                        runCatching {
-                            uriHandler.openUri(
-                                "https://github.com/vitorpamplona/amethyst/blob/main/PRIVACY.md#child-safety-standards",
-                            )
-                        }
-                    },
-                )
+            if (BuildConfig.FLAVOR == "play") {
+                SettingsSection(R.string.about_legal) {
+                    SettingsItem(
+                        title = R.string.privacy_policy,
+                        icon = MaterialSymbols.Lock,
+                        onClick = {
+                            runCatching {
+                                uriHandler.openUri(
+                                    "https://github.com/vitorpamplona/amethyst/blob/main/PRIVACY.md",
+                                )
+                            }
+                        },
+                    )
+                    SettingsDivider()
+                    SettingsItem(
+                        title = R.string.child_safety_standards,
+                        icon = MaterialSymbols.Shield,
+                        onClick = {
+                            runCatching {
+                                uriHandler.openUri(
+                                    "https://github.com/vitorpamplona/amethyst/blob/main/PRIVACY.md#child-safety-standards",
+                                )
+                            }
+                        },
+                    )
+                }
             }
 
             SettingsSection(R.string.danger_zone, isDanger = true) {

amethyst/src/main/java/com/vitorpamplona/amethyst/ui/screen/loggedOff/login/LoginScreen.kt

@@ -66,6 +66,7 @@ import androidx.compose.ui.tooling.preview.Preview
 import androidx.compose.ui.unit.dp
 import androidx.lifecycle.viewmodel.compose.viewModel
 import com.vitorpamplona.amethyst.Amethyst
+import com.vitorpamplona.amethyst.BuildConfig
 import com.vitorpamplona.amethyst.R
 import com.vitorpamplona.amethyst.commons.hashtags.Amethyst
 import com.vitorpamplona.amethyst.commons.hashtags.CustomHashTagIcons
@@ -196,7 +197,7 @@ fun LoginPage(
             )
         }
 
-        if (loginViewModel.isFirstLogin) {
+        if (loginViewModel.isFirstLogin && BuildConfig.FLAVOR == "play") {
             AcceptTerms(
                 checked = loginViewModel.acceptedTerms,
                 onCheckedChange = loginViewModel::updateAcceptedTerms,

amethyst/src/main/java/com/vitorpamplona/amethyst/ui/screen/loggedOff/login/LoginViewModel.kt

@@ -27,6 +27,7 @@ import androidx.compose.runtime.mutableStateOf
 import androidx.compose.runtime.setValue
 import androidx.compose.ui.text.input.TextFieldValue
 import androidx.lifecycle.ViewModel
+import com.vitorpamplona.amethyst.BuildConfig
 import com.vitorpamplona.amethyst.R
 import com.vitorpamplona.amethyst.ui.screen.AccountSessionManager
 import com.vitorpamplona.amethyst.ui.tor.TorSettingsFlow
@@ -68,7 +69,7 @@ class LoginViewModel : ViewModel() {
     ) {
         clear()
         this.isFirstLogin = isFirstLogin
-        acceptedTerms = !isFirstLogin
+        acceptedTerms = !isFirstLogin || BuildConfig.FLAVOR != "play"
         if (newAccountKey != null) {
             key = TextFieldValue(newAccountKey)
         }
@@ -79,7 +80,7 @@ class LoginViewModel : ViewModel() {
         password = TextFieldValue("")
 
         errorManager.clearErrors()
-        acceptedTerms = false
+        acceptedTerms = BuildConfig.FLAVOR != "play"
         processingLogin = false
         isTemporary = false
         offerTemporaryLogin = false

amethyst/src/main/java/com/vitorpamplona/amethyst/ui/screen/loggedOff/signup/SignUpScreen.kt

@@ -50,6 +50,7 @@ import androidx.compose.ui.tooling.preview.Preview
 import androidx.compose.ui.unit.dp
 import androidx.lifecycle.viewmodel.compose.viewModel
 import com.vitorpamplona.amethyst.Amethyst
+import com.vitorpamplona.amethyst.BuildConfig
 import com.vitorpamplona.amethyst.R
 import com.vitorpamplona.amethyst.commons.hashtags.Amethyst
 import com.vitorpamplona.amethyst.commons.hashtags.CustomHashTagIcons
@@ -187,17 +188,19 @@ fun SignUpPage(
             },
         )
 
-        AcceptTerms(
-            checked = signUpViewModel.acceptedTerms,
-            onCheckedChange = signUpViewModel::updateAcceptedTerms,
-        )
-
-        if (signUpViewModel.termsAcceptanceIsRequiredError) {
-            Text(
-                text = stringRes(R.string.acceptance_of_terms_is_required),
-                color = MaterialTheme.colorScheme.error,
-                style = MaterialTheme.typography.bodySmall,
+        if (BuildConfig.FLAVOR == "play") {
+            AcceptTerms(
+                checked = signUpViewModel.acceptedTerms,
+                onCheckedChange = signUpViewModel::updateAcceptedTerms,
             )
+
+            if (signUpViewModel.termsAcceptanceIsRequiredError) {
+                Text(
+                    text = stringRes(R.string.acceptance_of_terms_is_required),
+                    color = MaterialTheme.colorScheme.error,
+                    style = MaterialTheme.typography.bodySmall,
+                )
+            }
         }
 
         Spacer(modifier = Modifier.height(Size10dp))

amethyst/src/main/java/com/vitorpamplona/amethyst/ui/screen/loggedOff/signup/SignUpViewModel.kt

@@ -26,6 +26,7 @@ import androidx.compose.runtime.mutableStateOf
 import androidx.compose.runtime.setValue
 import androidx.compose.ui.text.input.TextFieldValue
 import androidx.lifecycle.ViewModel
+import com.vitorpamplona.amethyst.BuildConfig
 import com.vitorpamplona.amethyst.R
 import com.vitorpamplona.amethyst.ui.screen.AccountSessionManager
 import com.vitorpamplona.amethyst.ui.screen.loggedOff.login.LoginErrorManager
@@ -40,7 +41,7 @@ class SignUpViewModel : ViewModel() {
 
     var displayName by mutableStateOf(TextFieldValue(""))
 
-    var acceptedTerms by mutableStateOf(false)
+    var acceptedTerms by mutableStateOf(BuildConfig.FLAVOR != "play")
     var termsAcceptanceIsRequiredError by mutableStateOf(false)
 
     fun init(accountSessionManager: AccountSessionManager) {