src/app/components/DeviceDetailOverlay.tsx

@@ -413,9 +413,7 @@ export default function DeviceDetailOverlay({
                 )}
               </div>
 
-              {(deviceData.cache !== undefined ||
-                (deviceData.base_url ?? '').includes('://') ||
-                (deviceData.url ?? '').includes('://')) && (
+              {deviceData.cache !== undefined && (
                 <div>
                   <label className="text-sm text-neutral-500 block mb-2">Cache</label>
                   <div className="flex gap-2">

src/app/settings.ts

@@ -164,62 +164,34 @@ export async function readSettings(): Promise<ReadSettingsResult | null> {
   }
 }
 
-export interface SavedJson {
-  configJson:  string;
-  devicesJson: string;
-  /** True if at least one file was actually written. */
-  wrote: boolean;
-}
-
-/** Serialize config into the two canonical JSON strings without writing anything. */
-export function serializeConfig(config: SettingsConfig): SavedJson {
-  const { devices, ...mainConfig } = config;
-  return {
-    configJson:  JSON.stringify(mainConfig,  null, 2) + '\n',
-    devicesJson: JSON.stringify({ devices }, null, 2) + '\n',
-    wrote: false,
-  };
-}
-
 /**
  * Persist the settings object to the WebDAV server, creating the
  * containing `/.sys/` directory if needed. Pretty-prints with 2-space
  * indentation so the file is diff-friendly.
- *
- * Pass `lastSaved` to skip writing files whose content hasn't changed.
- * Returns the canonical JSON strings that were written (or would have been).
  */
-export async function writeSettings(
-  config: SettingsConfig,
-  lastSaved?: SavedJson | null,
-): Promise<SavedJson> {
-  const next = serializeConfig(config);
-
-  const writeConfig  = !lastSaved || next.configJson  !== lastSaved.configJson;
-  const writeDevices = !lastSaved || next.devicesJson !== lastSaved.devicesJson;
-
-  if (!writeConfig && !writeDevices) return { ...next, wrote: false };
-
+export async function writeSettings(config: SettingsConfig): Promise<void> {
   try { await createFolder(SETTINGS_DIR, true); } catch { /* exists */ }
 
-  const writes: Promise<void>[] = [];
-  if (writeConfig)  writes.push(putFileContents(SETTINGS_PATH, next.configJson));
-  if (writeDevices) writes.push(putFileContents(DEVICES_PATH,  next.devicesJson));
-  await Promise.all(writes);
+  const { devices, ...mainConfig } = config;
+  const configJson  = JSON.stringify(mainConfig,   null, 2) + '\n';
+  const devicesJson = JSON.stringify({ devices },  null, 2) + '\n';
+
+  await Promise.all([
+    putFileContents(SETTINGS_PATH, configJson),
+    putFileContents(DEVICES_PATH,  devicesJson),
+  ]);
 
   // Mirror to /sd/.sys/ if the SD card is mounted.
   try {
     const sdStat = await stat('/sd');
     if (sdStat) {
       try { await createFolder(SD_SYS_DIR, true); } catch { /* exists */ }
-      const sdWrites: Promise<void>[] = [];
-      if (writeConfig)  sdWrites.push(putFileContents(SD_SYS_DIR + '/config.json',  next.configJson));
-      if (writeDevices) sdWrites.push(putFileContents(SD_SYS_DIR + '/devices.json', next.devicesJson));
-      await Promise.all(sdWrites);
+      await Promise.all([
+        putFileContents(SD_SYS_DIR + '/config.json',  configJson),
+        putFileContents(SD_SYS_DIR + '/devices.json', devicesJson),
+      ]);
     }
   } catch { /* /sd unreachable — skip mirror */ }
-
-  return { ...next, wrote: true };
 }
 
 export type SaveStatus =
@@ -268,13 +240,12 @@ export function useSettings(): UseSettingsResult {
 
   // Refs so the debounced writer always sees the latest values without
   // needing to re-subscribe on every render.
-  const configRef      = useRef<SettingsConfig>(config);
-  const loadedRef      = useRef<boolean>(false);
-  const timerRef       = useRef<number | null>(null);
-  const dirtyRef       = useRef<boolean>(false);
-  const pendingRef     = useRef<number>(0);
-  const savedTimerRef  = useRef<number | null>(null);
-  const lastSavedRef   = useRef<SavedJson | null>(null);
+  const configRef = useRef<SettingsConfig>(config);
+  const loadedRef = useRef<boolean>(false);
+  const timerRef = useRef<number | null>(null);
+  const dirtyRef = useRef<boolean>(false);
+  const pendingRef = useRef<number>(0);
+  const savedTimerRef = useRef<number | null>(null);
 
   const load = useCallback(async () => {
     setSaveStatus('loading');
@@ -286,7 +257,7 @@ export function useSettings(): UseSettingsResult {
         // Persist the migrated config immediately so the device is updated.
         setSaveStatus('saving');
         try {
-          lastSavedRef.current = await writeSettings(result.config);
+          await writeSettings(result.config);
           setSaveStatus('saved');
           savedTimerRef.current = window.setTimeout(() => {
             setSaveStatus((s) => (s === 'saved' ? 'idle' : s));
@@ -302,8 +273,6 @@ export function useSettings(): UseSettingsResult {
         setLoaded(true);
         return;
       }
-      // Record what the server holds so flushNow can skip unchanged files.
-      lastSavedRef.current = serializeConfig(result.config);
     }
     loadedRef.current = true;
     setLoaded(true);
@@ -330,16 +299,12 @@ export function useSettings(): UseSettingsResult {
     setPendingCount(0);
     setSaveStatus('saving');
     try {
-      const result = await writeSettings(configRef.current, lastSavedRef.current);
-      lastSavedRef.current = result;
-      if (result.wrote) {
-        setSaveStatus('saved');
-        savedTimerRef.current = window.setTimeout(() => {
-          setSaveStatus((s) => (s === 'saved' ? 'idle' : s));
-        }, SAVED_INDICATOR_MS);
-      } else {
-        setSaveStatus('idle');
-      }
+      await writeSettings(configRef.current);
+      setSaveStatus('saved');
+      // Drop the "saved" badge after a short delay so it doesn't linger.
+      savedTimerRef.current = window.setTimeout(() => {
+        setSaveStatus((s) => (s === 'saved' ? 'idle' : s));
+      }, SAVED_INDICATOR_MS);
     } catch (e) {
       // Roll back: the change is still pending.
       dirtyRef.current = true;
@@ -359,20 +324,19 @@ export function useSettings(): UseSettingsResult {
       // Modern browsers: `fetch` with `keepalive: true` continues even
       // after the page is being unloaded. We don't await it.
       try {
-        const next = serializeConfig(configRef.current);
-        const last = lastSavedRef.current;
-        if (!last || next.configJson  !== last.configJson) {
-          void fetch(absoluteUrl(SETTINGS_PATH), {
-            method: 'PUT', body: next.configJson,
-            headers: { 'Content-Type': 'application/json' }, keepalive: true,
-          });
-        }
-        if (!last || next.devicesJson !== last.devicesJson) {
-          void fetch(absoluteUrl(DEVICES_PATH), {
-            method: 'PUT', body: next.devicesJson,
-            headers: { 'Content-Type': 'application/json' }, keepalive: true,
-          });
-        }
+        const { devices, ...mainConfig } = configRef.current;
+        void fetch(absoluteUrl(SETTINGS_PATH), {
+          method: 'PUT',
+          body: JSON.stringify(mainConfig,  null, 2) + '\n',
+          headers: { 'Content-Type': 'application/json' },
+          keepalive: true,
+        });
+        void fetch(absoluteUrl(DEVICES_PATH), {
+          method: 'PUT',
+          body: JSON.stringify({ devices }, null, 2) + '\n',
+          headers: { 'Content-Type': 'application/json' },
+          keepalive: true,
+        });
       } catch {
         /* ignore */
       }