fix: avoid hiding remote lookup errors

lib/github.ts

@@ -215,8 +215,8 @@ export async function getRemoteFolder(
               return { name: f.name, size: pointer.size }
             }
           }
-        } catch {
-          // Fall through to use the original size
+        } catch (err) {
+          if (!isHttpError(err) || err.status !== 404) throw err
         }
 
         return { name: f.name, size: f.size }

lib/nextcloud.ts

@@ -63,12 +63,13 @@ async function davRequest(
 
 /** Check if a folder exists on the Nextcloud instance. */
 export async function folderExists(path: string): Promise<boolean> {
-  try {
-    const res = await davRequest('PROPFIND', path + '/', null, { Depth: '0' })
-    return res.status >= 200 && res.status < 300
-  } catch {
-    return false
-  }
+  const res = await davRequest('PROPFIND', path + '/', null, { Depth: '0' })
+
+  if (res.status === 404) return false
+  if (res.status >= 200 && res.status < 300) return true
+
+  const text = await res.text().catch(() => '')
+  throw new Error(`PROPFIND ${path} failed (${res.status}): ${text.slice(0, 200)}`)
 }
 
 /**