fix(desktop): retry file URL without stale entity id (#159)

The entity id cached in local inventory can go stale when the remote
file is re-uploaded or migrated, which made hydration/opening fail
permanently with "entity not exist" (40077). Both the on-demand
hydration path and the download task now retry letting the server pick
the primary entity.

Authored By: TDvorak <info@tdvorak.dev>

Generated with [Devin](https://devin.ai)

Co-Authored-By: Devin <158243242+devin-ai-integration[bot]@users.noreply.github.com>

desktop/crates/cloudreve-api/src/error.rs

@@ -46,6 +46,7 @@ pub enum ErrorCode {
     IncorrectPassword = 40069,
     LockConflict = 40073,
     StaleVersion = 40076,
+    EntityNotExist = 40077,
     BatchOperationNotFullyCompleted = 40081,
     DomainNotLicensed = 40087,
     AnonymousAccessDenied = 40088,
@@ -65,6 +66,7 @@ impl ErrorCode {
             40069 => Some(Self::IncorrectPassword),
             40073 => Some(Self::LockConflict),
             40076 => Some(Self::StaleVersion),
+            40077 => Some(Self::EntityNotExist),
             40081 => Some(Self::BatchOperationNotFullyCompleted),
             40087 => Some(Self::DomainNotLicensed),
             40088 => Some(Self::AnonymousAccessDenied),
@@ -198,6 +200,11 @@ impl ApiError {
         matches!(self, ApiError::AccessTokenExpired)
     }
 
+    /// Check if this error reports a missing entity (code 40077)
+    pub fn is_entity_not_exist(&self) -> bool {
+        matches!(self, ApiError::ApiError { code, .. } if *code == 40077)
+    }
+
     /// Check if this error requires login
     pub fn requires_login(&self) -> bool {
         matches!(

desktop/crates/cloudreve-sync/src/drive/commands.rs

@@ -239,11 +239,21 @@ impl Mount {
                 request.entity = Some(meta.etag.clone());
             }
         }
-        let entity_url_res = self
+        let entity_url_res = match self.cr_client.get_file_url(&request).await {
-            .cr_client
+            Err(e) if e.is_entity_not_exist() && request.entity.is_some() => {
-            .get_file_url(&request)
+                // The entity id cached in local inventory can go stale when the
+                // remote file is re-uploaded or migrated; retry letting the
+                // server pick the primary entity.
+                tracing::info!(target: "drive::commands", path = %path.display(), "Preferred entity no longer exists, retrying without it");
+                let mut retry = request.clone();
+                retry.entity = None;
+                self.cr_client
+                    .get_file_url(&retry)
                     .await
-            .context("failed to get file url")?;
+                    .context("failed to get file url")?
+            }
+            res => res.context("failed to get file url")?,
+        };
 
         // Get the download URL from the response
         let download_url = entity_url_res

desktop/crates/cloudreve-sync/src/tasks/download.rs

@@ -338,11 +338,19 @@ impl<'a> DownloadTask<'a> {
                 .clone();
         }
 
-        let entity_url_res = self
+        let entity_url_res = match self.cr_client.get_file_url(&request).await {
-            .cr_client
+            Err(e) if e.is_entity_not_exist() && request.entity.is_some() => {
-            .get_file_url(&request)
+                // Entity id cached from a previous file info response may be
+                // stale; retry letting the server pick the primary entity.
+                let mut retry = request.clone();
+                retry.entity = None;
+                self.cr_client
+                    .get_file_url(&retry)
                     .await
-            .context("failed to get file url")?;
+                    .context("failed to get file url")?
+            }
+            res => res.context("failed to get file url")?,
+        };
 
         let download_url = entity_url_res
             .urls