Distinguish absent and unreadable remote settings during setup

Use typed Commonlib outcomes to guide Fetch and Rebuild without treating a new remote as a failed read. Preserve automatic synchronisation choices when scheduled initialisation is cancelled.

src/modules/features/SetupWizard/dialogs/FetchEverything.svelte

@@ -141,10 +141,11 @@
 </Instruction>
 <Instruction>
     <ExtraItems title={translateMessage("Advanced")}>
-        <Check
-            title={translateMessage("Prevent fetching configuration from server")}
-            bind:value={preventFetchingConfig}
-        />
+        <Check title={translateMessage("Use this device's settings")} bind:value={preventFetchingConfig}>
+            <InfoNote>
+                {translateMessage("Skips checking and applying synchronisation settings from the remote.")}
+            </InfoNote>
+        </Check>
     </ExtraItems>
 </Instruction>
 <UserDecisions>

src/modules/features/SetupWizard/dialogs/RebuildEverything.svelte

@@ -129,7 +129,9 @@
 {#if !isP2P}
     <Instruction>
         <ExtraItems title={msg("Advanced")}>
-            <Check title={msg("Prevent fetching configuration from server")} bind:value={preventFetchingConfig} />
+            <Check title={msg("Use this device's settings")} bind:value={preventFetchingConfig}>
+                <InfoNote>{msg("Skips checking and applying synchronisation settings from the remote.")}</InfoNote>
+            </Check>
         </ExtraItems>
     </Instruction>
 {/if}