Ask the server about a collection once per job, not once per file

Every `move_to` guaranteed its destination's parent with a `MKCOL` for
each ancestor down from the account root, and a trash folder under a
library root several levels deep meant three round trips answering
`405 Method Not Allowed` before the one `MOVE` that did anything — for
every image of a delete, on a connection built for that job.

The backend now records the collections it has confirmed exist and asks
about each once. It lives for one job, so a folder another client removes
mid-batch is the one case this misses, and the `MOVE` then reports the
`409` rather than hiding it.

core/dr-sync-nextcloud/src/lib.rs

@@ -47,6 +47,20 @@ pub struct NextcloudBackend {
     /// `/remote.php/dav/files/<user>/` — the prefix stripped from hrefs.
     dav_base: String,
     caps: Capabilities,
+    /// Collections this backend has seen exist, so [`create_dir`] asks the
+    /// server about each one once.
+    ///
+    /// Every `MOVE` guarantees its destination's parent, and did so with a
+    /// `MKCOL` for each ancestor down from the account root — for a trash
+    /// folder three levels deep that was three round trips of `405 Method
+    /// Not Allowed` before the one request that moved anything, on every
+    /// image of a batch. A backend lives for one job (`dr_ui::remote::
+    /// connect` builds one per worker), so a folder deleted by another
+    /// client mid-job is the one case this can get wrong, and it is reported
+    /// as the `409` the `MOVE` then earns rather than hidden.
+    ///
+    /// [`create_dir`]: RemoteBackend::create_dir
+    known_dirs: std::sync::Mutex<std::collections::HashSet<String>>,
 }
 
 impl NextcloudBackend {
@@ -63,6 +77,7 @@ impl NextcloudBackend {
             login: creds.login_name.clone(),
             password: creds.app_password.clone(),
             dav_base,
+            known_dirs: Default::default(),
             caps: Capabilities {
                 // The property that makes a no-op sync one request (ARCH §8.1).
                 change_detection: ChangeDetection::PropagatingEtags,
@@ -567,6 +582,16 @@ impl RemoteBackend for NextcloudBackend {
         chain.reverse();
 
         for dir in chain {
+            // Asked once per backend — see `known_dirs`. The lock is held
+            // across no await: it is taken to look, and again to record.
+            let known = self
+                .known_dirs
+                .lock()
+                .map(|k| k.contains(dir.as_str()))
+                .unwrap_or(false);
+            if known {
+                continue;
+            }
             let url = self.url_for(&dir);
             let resp = self
                 .client
@@ -581,10 +606,12 @@ impl RemoteBackend for NextcloudBackend {
 
             // 405 is "already a collection here", which is exactly what the
             // caller wanted. Anything else is reported.
-            if resp.status() == reqwest::StatusCode::METHOD_NOT_ALLOWED {
+            if resp.status() != reqwest::StatusCode::METHOD_NOT_ALLOWED {
-                continue;
+                map_status(resp.status(), &url)?;
+            }
+            if let Ok(mut k) = self.known_dirs.lock() {
+                k.insert(dir.as_str().to_string());
             }
-            map_status(resp.status(), &url)?;
         }
         Ok(())
     }

docs/traceability.md

@@ -39,7 +39,7 @@ A tag naming an ID `requirements.md` does not define — what renumbering produc
 | FR-CAT-11 | [`core/dr-catalog/src/dedup.rs:1`](../core/dr-catalog/src/dedup.rs#L1), [`core/dr-ingest/src/lib.rs:1`](../core/dr-ingest/src/lib.rs#L1), [`core/dr-ingest/src/lib.rs:392`](../core/dr-ingest/src/lib.rs#L392), [`core/dr-sync/src/upload.rs:40`](../core/dr-sync/src/upload.rs#L40), [`ui/dr-ui/src/import.rs:1`](../ui/dr-ui/src/import.rs#L1), [`ui/dr-ui/src/import_ui.rs:1`](../ui/dr-ui/src/import_ui.rs#L1), [`ui/dr-ui/src/lib.rs:1559`](../ui/dr-ui/src/lib.rs#L1559), [`ui/dr-ui/src/library.rs:183`](../ui/dr-ui/src/library.rs#L183), [`ui/dr-ui/src/library.rs:3396`](../ui/dr-ui/src/library.rs#L3396), [`ui/dr-ui/ui/import.slint:5`](../ui/dr-ui/ui/import.slint#L5) |
 | FR-CAT-12 | [`core/dr-pipeline/src/sidecar.rs:137`](../core/dr-pipeline/src/sidecar.rs#L137) |
 | FR-CAT-13 | [`core/dr-catalog/src/rating.rs:278`](../core/dr-catalog/src/rating.rs#L278), [`core/dr-catalog/src/schema.rs:740`](../core/dr-catalog/src/schema.rs#L740), [`core/dr-sync/src/scan.rs:40`](../core/dr-sync/src/scan.rs#L40), [`core/dr-sync/src/scan.rs:944`](../core/dr-sync/src/scan.rs#L944), [`core/dr-types/src/settings.rs:92`](../core/dr-types/src/settings.rs#L92), [`core/dr-xmp/src/lib.rs:1`](../core/dr-xmp/src/lib.rs#L1), [`core/dr-xmp/src/lib.rs:331`](../core/dr-xmp/src/lib.rs#L331), [`core/dr-xmp/src/lib.rs:442`](../core/dr-xmp/src/lib.rs#L442), [`core/dr-xmp/src/lib.rs:535`](../core/dr-xmp/src/lib.rs#L535), [`core/dr-xmp/src/lib.rs:733`](../core/dr-xmp/src/lib.rs#L733), [`core/dr-xmp/src/lib.rs:746`](../core/dr-xmp/src/lib.rs#L746), [`core/dr-xmp/src/read.rs:1`](../core/dr-xmp/src/read.rs#L1), [`core/dr-xmp/src/write.rs:1`](../core/dr-xmp/src/write.rs#L1), [`core/dr-xmp/tests/round_trip.rs:1`](../core/dr-xmp/tests/round_trip.rs#L1), [`ui/dr-ui/src/library.rs:1564`](../ui/dr-ui/src/library.rs#L1564), [`ui/dr-ui/src/library.rs:1627`](../ui/dr-ui/src/library.rs#L1627), [`ui/dr-ui/src/library.rs:1643`](../ui/dr-ui/src/library.rs#L1643), [`ui/dr-ui/src/library.rs:1750`](../ui/dr-ui/src/library.rs#L1750), [`ui/dr-ui/src/library_ui.rs:1322`](../ui/dr-ui/src/library_ui.rs#L1322), [`ui/dr-ui/src/library_ui.rs:301`](../ui/dr-ui/src/library_ui.rs#L301), [`ui/dr-ui/src/library_ui.rs:3427`](../ui/dr-ui/src/library_ui.rs#L3427), [`ui/dr-ui/src/library_ui.rs:3483`](../ui/dr-ui/src/library_ui.rs#L3483), [`ui/dr-ui/src/library_ui.rs:3581`](../ui/dr-ui/src/library_ui.rs#L3581), [`ui/dr-ui/src/library_ui.rs:392`](../ui/dr-ui/src/library_ui.rs#L392), [`ui/dr-ui/src/library_ui.rs:537`](../ui/dr-ui/src/library_ui.rs#L537), [`ui/dr-ui/src/library_ui.rs:5766`](../ui/dr-ui/src/library_ui.rs#L5766), [`ui/dr-ui/src/settings_ui.rs:540`](../ui/dr-ui/src/settings_ui.rs#L540), [`ui/dr-ui/src/xmp_sync.rs:1`](../ui/dr-ui/src/xmp_sync.rs#L1), [`ui/dr-ui/src/xmp_sync.rs:250`](../ui/dr-ui/src/xmp_sync.rs#L250), [`ui/dr-ui/src/xmp_sync.rs:287`](../ui/dr-ui/src/xmp_sync.rs#L287), [`ui/dr-ui/src/xmp_sync.rs:324`](../ui/dr-ui/src/xmp_sync.rs#L324), [`ui/dr-ui/ui/app.slint:900`](../ui/dr-ui/ui/app.slint#L900), [`ui/dr-ui/ui/settings.slint:1093`](../ui/dr-ui/ui/settings.slint#L1093), [`ui/dr-ui/ui/settings.slint:199`](../ui/dr-ui/ui/settings.slint#L199) |
-| FR-CAT-15 | [`core/dr-catalog/src/schema.rs:1076`](../core/dr-catalog/src/schema.rs#L1076), [`core/dr-catalog/src/trash.rs:1`](../core/dr-catalog/src/trash.rs#L1), [`core/dr-sync-nextcloud/src/lib.rs:507`](../core/dr-sync-nextcloud/src/lib.rs#L507), [`core/dr-sync/src/lib.rs:135`](../core/dr-sync/src/lib.rs#L135), [`core/dr-sync/src/scan.rs:618`](../core/dr-sync/src/scan.rs#L618), [`core/dr-sync/src/scan.rs:93`](../core/dr-sync/src/scan.rs#L93), [`core/dr-thumbs/src/lib.rs:393`](../core/dr-thumbs/src/lib.rs#L393), [`core/dr-types/src/place.rs:91`](../core/dr-types/src/place.rs#L91), [`ui/dr-ui/src/collections_ui.rs:1435`](../ui/dr-ui/src/collections_ui.rs#L1435), [`ui/dr-ui/src/collections_ui.rs:2341`](../ui/dr-ui/src/collections_ui.rs#L2341), [`ui/dr-ui/src/library.rs:183`](../ui/dr-ui/src/library.rs#L183), [`ui/dr-ui/src/library.rs:200`](../ui/dr-ui/src/library.rs#L200), [`ui/dr-ui/src/library.rs:249`](../ui/dr-ui/src/library.rs#L249), [`ui/dr-ui/src/library.rs:4592`](../ui/dr-ui/src/library.rs#L4592), [`ui/dr-ui/src/library.rs:4626`](../ui/dr-ui/src/library.rs#L4626), [`ui/dr-ui/src/library_ui.rs:238`](../ui/dr-ui/src/library_ui.rs#L238), [`ui/dr-ui/src/library_ui.rs:914`](../ui/dr-ui/src/library_ui.rs#L914), [`ui/dr-ui/src/trash.rs:1`](../ui/dr-ui/src/trash.rs#L1), [`ui/dr-ui/ui/collections.slint:745`](../ui/dr-ui/ui/collections.slint#L745) |
+| FR-CAT-15 | [`core/dr-catalog/src/schema.rs:1076`](../core/dr-catalog/src/schema.rs#L1076), [`core/dr-catalog/src/trash.rs:1`](../core/dr-catalog/src/trash.rs#L1), [`core/dr-sync-nextcloud/src/lib.rs:522`](../core/dr-sync-nextcloud/src/lib.rs#L522), [`core/dr-sync/src/lib.rs:135`](../core/dr-sync/src/lib.rs#L135), [`core/dr-sync/src/scan.rs:618`](../core/dr-sync/src/scan.rs#L618), [`core/dr-sync/src/scan.rs:93`](../core/dr-sync/src/scan.rs#L93), [`core/dr-thumbs/src/lib.rs:393`](../core/dr-thumbs/src/lib.rs#L393), [`core/dr-types/src/place.rs:91`](../core/dr-types/src/place.rs#L91), [`ui/dr-ui/src/collections_ui.rs:1435`](../ui/dr-ui/src/collections_ui.rs#L1435), [`ui/dr-ui/src/collections_ui.rs:2341`](../ui/dr-ui/src/collections_ui.rs#L2341), [`ui/dr-ui/src/library.rs:183`](../ui/dr-ui/src/library.rs#L183), [`ui/dr-ui/src/library.rs:200`](../ui/dr-ui/src/library.rs#L200), [`ui/dr-ui/src/library.rs:249`](../ui/dr-ui/src/library.rs#L249), [`ui/dr-ui/src/library.rs:4592`](../ui/dr-ui/src/library.rs#L4592), [`ui/dr-ui/src/library.rs:4626`](../ui/dr-ui/src/library.rs#L4626), [`ui/dr-ui/src/library_ui.rs:238`](../ui/dr-ui/src/library_ui.rs#L238), [`ui/dr-ui/src/library_ui.rs:914`](../ui/dr-ui/src/library_ui.rs#L914), [`ui/dr-ui/src/trash.rs:1`](../ui/dr-ui/src/trash.rs#L1), [`ui/dr-ui/ui/collections.slint:745`](../ui/dr-ui/ui/collections.slint#L745) |
 | FR-CAT-1a | [`core/dr-catalog/src/walk.rs:1`](../core/dr-catalog/src/walk.rs#L1), [`core/dr-types/src/lib.rs:56`](../core/dr-types/src/lib.rs#L56), [`platform/dr-plat/src/storage.rs:1`](../platform/dr-plat/src/storage.rs#L1), [`platform/dr-plat/src/storage.rs:216`](../platform/dr-plat/src/storage.rs#L216), [`platform/dr-plat/src/storage.rs:46`](../platform/dr-plat/src/storage.rs#L46) |
 | FR-CAT-2 | [`core/dr-catalog/src/lib.rs:1`](../core/dr-catalog/src/lib.rs#L1), [`core/dr-catalog/src/schema.rs:1`](../core/dr-catalog/src/schema.rs#L1) |
 | FR-CAT-3 | [`core/dr-catalog/src/jobs.rs:1`](../core/dr-catalog/src/jobs.rs#L1), [`core/dr-catalog/src/walk.rs:66`](../core/dr-catalog/src/walk.rs#L66), [`core/dr-sync/src/scan.rs:105`](../core/dr-sync/src/scan.rs#L105), [`core/dr-thumbs/src/codec.rs:1`](../core/dr-thumbs/src/codec.rs#L1), [`core/dr-thumbs/src/lib.rs:1`](../core/dr-thumbs/src/lib.rs#L1), [`ui/dr-ui/src/derived_sync.rs:1`](../ui/dr-ui/src/derived_sync.rs#L1), [`ui/dr-ui/src/import.rs:463`](../ui/dr-ui/src/import.rs#L463), [`ui/dr-ui/src/import.rs:488`](../ui/dr-ui/src/import.rs#L488), [`ui/dr-ui/src/library.rs:3940`](../ui/dr-ui/src/library.rs#L3940), [`ui/dr-ui/src/library_ui.rs:177`](../ui/dr-ui/src/library_ui.rs#L177), [`ui/dr-ui/src/library_ui.rs:4515`](../ui/dr-ui/src/library_ui.rs#L4515), [`ui/dr-ui/src/library_ui.rs:6027`](../ui/dr-ui/src/library_ui.rs#L6027), [`ui/dr-ui/src/repairs.rs:1`](../ui/dr-ui/src/repairs.rs#L1), [`ui/dr-ui/src/repairs.rs:670`](../ui/dr-ui/src/repairs.rs#L670), [`ui/dr-ui/ui/app.slint:387`](../ui/dr-ui/ui/app.slint#L387), [`ui/dr-ui/ui/settings.slint:435`](../ui/dr-ui/ui/settings.slint#L435), [`ui/dr-ui/ui/settings.slint:73`](../ui/dr-ui/ui/settings.slint#L73) |
@@ -112,7 +112,7 @@ A tag naming an ID `requirements.md` does not define — what renumbering produc
 | FR-MRG-8 | [`core/dr-pano/src/xfeat.rs:1`](../core/dr-pano/src/xfeat.rs#L1), [`core/dr-segment/examples/onnx_probe.rs:1`](../core/dr-segment/examples/onnx_probe.rs#L1) |
 | FR-NC-1 | [`core/dr-sync-nextcloud/src/auth.rs:132`](../core/dr-sync-nextcloud/src/auth.rs#L132), [`core/dr-sync-nextcloud/src/auth.rs:44`](../core/dr-sync-nextcloud/src/auth.rs#L44), [`core/dr-sync-nextcloud/src/provider.rs:1`](../core/dr-sync-nextcloud/src/provider.rs#L1), [`core/dr-sync/src/account.rs:375`](../core/dr-sync/src/account.rs#L375), [`ui/dr-ui/src/launch.rs:316`](../ui/dr-ui/src/launch.rs#L316), [`ui/dr-ui/src/launch.rs:61`](../ui/dr-ui/src/launch.rs#L61), [`ui/dr-ui/src/launch_ui.rs:418`](../ui/dr-ui/src/launch_ui.rs#L418) |
 | FR-NC-10 | [`core/dr-sync/src/account.rs:240`](../core/dr-sync/src/account.rs#L240), [`ui/dr-ui/src/export.rs:1`](../ui/dr-ui/src/export.rs#L1), [`ui/dr-ui/src/lib.rs:680`](../ui/dr-ui/src/lib.rs#L680), [`ui/dr-ui/src/library.rs:1234`](../ui/dr-ui/src/library.rs#L1234), [`ui/dr-ui/src/library.rs:2527`](../ui/dr-ui/src/library.rs#L2527), [`ui/dr-ui/src/library.rs:653`](../ui/dr-ui/src/library.rs#L653), [`ui/dr-ui/src/library.rs:980`](../ui/dr-ui/src/library.rs#L980), [`ui/dr-ui/src/library_ui.rs:2057`](../ui/dr-ui/src/library_ui.rs#L2057), [`ui/dr-ui/src/library_ui.rs:4249`](../ui/dr-ui/src/library_ui.rs#L4249), [`ui/dr-ui/src/library_ui.rs:662`](../ui/dr-ui/src/library_ui.rs#L662), [`ui/dr-ui/src/sidecar_cache.rs:1`](../ui/dr-ui/src/sidecar_cache.rs#L1) |
-| FR-NC-12 | [`core/dr-sync-folder/src/lib.rs:1`](../core/dr-sync-folder/src/lib.rs#L1), [`core/dr-sync-nextcloud/src/lib.rs:1022`](../core/dr-sync-nextcloud/src/lib.rs#L1022), [`core/dr-sync-nextcloud/src/lib.rs:40`](../core/dr-sync-nextcloud/src/lib.rs#L40), [`core/dr-sync-nextcloud/src/provider.rs:1`](../core/dr-sync-nextcloud/src/provider.rs#L1), [`core/dr-sync/src/account.rs:1`](../core/dr-sync/src/account.rs#L1), [`core/dr-sync/src/account.rs:87`](../core/dr-sync/src/account.rs#L87), [`core/dr-sync/src/lib.rs:218`](../core/dr-sync/src/lib.rs#L218), [`core/dr-sync/src/lib.rs:51`](../core/dr-sync/src/lib.rs#L51), [`core/dr-sync/src/provider.rs:106`](../core/dr-sync/src/provider.rs#L106), [`core/dr-sync/src/provider.rs:1`](../core/dr-sync/src/provider.rs#L1), [`core/dr-sync/src/provider.rs:53`](../core/dr-sync/src/provider.rs#L53), [`core/dr-sync/src/reachability.rs:1`](../core/dr-sync/src/reachability.rs#L1), [`ui/dr-ui/src/remote.rs:1`](../ui/dr-ui/src/remote.rs#L1) |
+| FR-NC-12 | [`core/dr-sync-folder/src/lib.rs:1`](../core/dr-sync-folder/src/lib.rs#L1), [`core/dr-sync-nextcloud/src/lib.rs:1049`](../core/dr-sync-nextcloud/src/lib.rs#L1049), [`core/dr-sync-nextcloud/src/lib.rs:40`](../core/dr-sync-nextcloud/src/lib.rs#L40), [`core/dr-sync-nextcloud/src/provider.rs:1`](../core/dr-sync-nextcloud/src/provider.rs#L1), [`core/dr-sync/src/account.rs:1`](../core/dr-sync/src/account.rs#L1), [`core/dr-sync/src/account.rs:87`](../core/dr-sync/src/account.rs#L87), [`core/dr-sync/src/lib.rs:218`](../core/dr-sync/src/lib.rs#L218), [`core/dr-sync/src/lib.rs:51`](../core/dr-sync/src/lib.rs#L51), [`core/dr-sync/src/provider.rs:106`](../core/dr-sync/src/provider.rs#L106), [`core/dr-sync/src/provider.rs:1`](../core/dr-sync/src/provider.rs#L1), [`core/dr-sync/src/provider.rs:53`](../core/dr-sync/src/provider.rs#L53), [`core/dr-sync/src/reachability.rs:1`](../core/dr-sync/src/reachability.rs#L1), [`ui/dr-ui/src/remote.rs:1`](../ui/dr-ui/src/remote.rs#L1) |
 | FR-NC-13 | [`core/dr-sync-folder/src/lib.rs:197`](../core/dr-sync-folder/src/lib.rs#L197), [`core/dr-sync-folder/src/lib.rs:1`](../core/dr-sync-folder/src/lib.rs#L1), [`core/dr-sync-folder/src/lib.rs:73`](../core/dr-sync-folder/src/lib.rs#L73), [`core/dr-sync/src/provider.rs:106`](../core/dr-sync/src/provider.rs#L106), [`ui/dr-ui/src/launch_ui.rs:317`](../ui/dr-ui/src/launch_ui.rs#L317), [`ui/dr-ui/src/remote.rs:1`](../ui/dr-ui/src/remote.rs#L1) |
 | FR-NC-2 | [`core/dr-sync/src/account.rs:1`](../core/dr-sync/src/account.rs#L1), [`core/dr-sync/src/account.rs:318`](../core/dr-sync/src/account.rs#L318), [`core/dr-sync/src/account.rs:375`](../core/dr-sync/src/account.rs#L375), [`core/dr-sync/src/account.rs:59`](../core/dr-sync/src/account.rs#L59), [`platform/dr-plat/src/secrets.rs:82`](../platform/dr-plat/src/secrets.rs#L82) |
 | FR-NC-3 | [`core/dr-decode/src/locate.rs:1`](../core/dr-decode/src/locate.rs#L1), [`core/dr-decode/src/preview.rs:148`](../core/dr-decode/src/preview.rs#L148), [`core/dr-sync/src/capability.rs:85`](../core/dr-sync/src/capability.rs#L85), [`core/dr-thumbs/src/lib.rs:1`](../core/dr-thumbs/src/lib.rs#L1), [`core/dr-types/src/place.rs:1`](../core/dr-types/src/place.rs#L1), [`ui/dr-ui/src/library.rs:1`](../ui/dr-ui/src/library.rs#L1), [`ui/dr-ui/src/library.rs:3940`](../ui/dr-ui/src/library.rs#L3940), [`ui/dr-ui/src/library_ui.rs:1`](../ui/dr-ui/src/library_ui.rs#L1), [`ui/dr-ui/src/library_ui.rs:4515`](../ui/dr-ui/src/library_ui.rs#L4515), [`ui/dr-ui/src/library_ui.rs:6027`](../ui/dr-ui/src/library_ui.rs#L6027), [`ui/dr-ui/ui/app.slint:387`](../ui/dr-ui/ui/app.slint#L387), [`ui/dr-ui/ui/settings.slint:435`](../ui/dr-ui/ui/settings.slint#L435), [`ui/dr-ui/ui/settings.slint:73`](../ui/dr-ui/ui/settings.slint#L73) |
@@ -123,11 +123,11 @@ A tag naming an ID `requirements.md` does not define — what renumbering produc
 | FR-NC-6b | [`ui/dr-ui/src/library_ui.rs:1711`](../ui/dr-ui/src/library_ui.rs#L1711), [`ui/dr-ui/src/memory.rs:1`](../ui/dr-ui/src/memory.rs#L1) |
 | FR-NC-6c | [`core/dr-catalog/src/cache.rs:225`](../core/dr-catalog/src/cache.rs#L225), [`core/dr-sync-folder/src/borrow.rs:1`](../core/dr-sync-folder/src/borrow.rs#L1), [`core/dr-sync-folder/src/lib.rs:197`](../core/dr-sync-folder/src/lib.rs#L197), [`core/dr-sync-folder/src/lib.rs:73`](../core/dr-sync-folder/src/lib.rs#L73), [`core/dr-sync-folder/src/lib.rs:818`](../core/dr-sync-folder/src/lib.rs#L818), [`core/dr-sync-folder/src/lib.rs:857`](../core/dr-sync-folder/src/lib.rs#L857), [`core/dr-sync-folder/src/vfs.rs:1`](../core/dr-sync-folder/src/vfs.rs#L1), [`core/dr-sync-nextcloud/src/desktop_client.rs:172`](../core/dr-sync-nextcloud/src/desktop_client.rs#L172), [`core/dr-sync-nextcloud/src/desktop_client.rs:35`](../core/dr-sync-nextcloud/src/desktop_client.rs#L35), [`core/dr-sync/src/capability.rs:41`](../core/dr-sync/src/capability.rs#L41), [`core/dr-sync/src/error.rs:39`](../core/dr-sync/src/error.rs#L39), [`core/dr-sync/src/lib.rs:158`](../core/dr-sync/src/lib.rs#L158), [`core/dr-sync/src/types.rs:101`](../core/dr-sync/src/types.rs#L101), [`core/dr-types/src/lib.rs:122`](../core/dr-types/src/lib.rs#L122), [`core/dr-types/src/lib.rs:204`](../core/dr-types/src/lib.rs#L204), [`ui/dr-ui/src/activity.rs:1`](../ui/dr-ui/src/activity.rs#L1), [`ui/dr-ui/src/collections_ui.rs:4083`](../ui/dr-ui/src/collections_ui.rs#L4083), [`ui/dr-ui/src/collections_ui.rs:785`](../ui/dr-ui/src/collections_ui.rs#L785), [`ui/dr-ui/src/collections_ui.rs:856`](../ui/dr-ui/src/collections_ui.rs#L856), [`ui/dr-ui/src/derived_sync.rs:1042`](../ui/dr-ui/src/derived_sync.rs#L1042), [`ui/dr-ui/src/derived_sync.rs:642`](../ui/dr-ui/src/derived_sync.rs#L642), [`ui/dr-ui/src/library.rs:1084`](../ui/dr-ui/src/library.rs#L1084), [`ui/dr-ui/src/library.rs:2293`](../ui/dr-ui/src/library.rs#L2293), [`ui/dr-ui/src/library.rs:2383`](../ui/dr-ui/src/library.rs#L2383), [`ui/dr-ui/src/library.rs:4060`](../ui/dr-ui/src/library.rs#L4060), [`ui/dr-ui/src/library_ui.rs:1482`](../ui/dr-ui/src/library_ui.rs#L1482), [`ui/dr-ui/src/library_ui.rs:1555`](../ui/dr-ui/src/library_ui.rs#L1555), [`ui/dr-ui/src/library_ui.rs:1754`](../ui/dr-ui/src/library_ui.rs#L1754), [`ui/dr-ui/src/remote.rs:40`](../ui/dr-ui/src/remote.rs#L40), [`ui/dr-ui/src/repairs.rs:1105`](../ui/dr-ui/src/repairs.rs#L1105), [`ui/dr-ui/ui/collections.slint:272`](../ui/dr-ui/ui/collections.slint#L272), [`ui/dr-ui/ui/collections.slint:877`](../ui/dr-ui/ui/collections.slint#L877), [`ui/dr-ui/ui/icons.slint:262`](../ui/dr-ui/ui/icons.slint#L262) |
 | FR-NC-6d | [`core/dr-sync-folder/src/borrow.rs:1`](../core/dr-sync-folder/src/borrow.rs#L1), [`core/dr-sync-folder/src/lib.rs:1`](../core/dr-sync-folder/src/lib.rs#L1), [`core/dr-sync-folder/src/vfs.rs:1`](../core/dr-sync-folder/src/vfs.rs#L1) |
-| FR-NC-7 | [`core/dr-catalog/src/face_shard.rs:1`](../core/dr-catalog/src/face_shard.rs#L1), [`core/dr-sync-nextcloud/src/lib.rs:105`](../core/dr-sync-nextcloud/src/lib.rs#L105), [`ui/dr-ui/src/derived_sync.rs:1`](../ui/dr-ui/src/derived_sync.rs#L1), [`ui/dr-ui/src/library.rs:3940`](../ui/dr-ui/src/library.rs#L3940), [`ui/dr-ui/src/library_ui.rs:4515`](../ui/dr-ui/src/library_ui.rs#L4515), [`ui/dr-ui/ui/settings.slint:435`](../ui/dr-ui/ui/settings.slint#L435) |
+| FR-NC-7 | [`core/dr-catalog/src/face_shard.rs:1`](../core/dr-catalog/src/face_shard.rs#L1), [`core/dr-sync-nextcloud/src/lib.rs:120`](../core/dr-sync-nextcloud/src/lib.rs#L120), [`ui/dr-ui/src/derived_sync.rs:1`](../ui/dr-ui/src/derived_sync.rs#L1), [`ui/dr-ui/src/library.rs:3940`](../ui/dr-ui/src/library.rs#L3940), [`ui/dr-ui/src/library_ui.rs:4515`](../ui/dr-ui/src/library_ui.rs#L4515), [`ui/dr-ui/ui/settings.slint:435`](../ui/dr-ui/ui/settings.slint#L435) |
 | FR-NC-7a | [`core/dr-ingest/src/layout.rs:1`](../core/dr-ingest/src/layout.rs#L1), [`core/dr-sync/src/upload.rs:1`](../core/dr-sync/src/upload.rs#L1), [`core/dr-sync/src/upload.rs:40`](../core/dr-sync/src/upload.rs#L40), [`core/dr-types/src/settings.rs:377`](../core/dr-types/src/settings.rs#L377), [`ui/dr-ui/src/import.rs:1`](../ui/dr-ui/src/import.rs#L1), [`ui/dr-ui/src/import.rs:97`](../ui/dr-ui/src/import.rs#L97), [`ui/dr-ui/src/import_ui.rs:1`](../ui/dr-ui/src/import_ui.rs#L1), [`ui/dr-ui/src/lib.rs:1559`](../ui/dr-ui/src/lib.rs#L1559), [`ui/dr-ui/ui/import.slint:5`](../ui/dr-ui/ui/import.slint#L5) |
 | FR-NC-7b | [`core/dr-ingest/src/lib.rs:733`](../core/dr-ingest/src/lib.rs#L733), [`core/dr-sync/src/upload.rs:1`](../core/dr-sync/src/upload.rs#L1), [`ui/dr-ui/src/import.rs:122`](../ui/dr-ui/src/import.rs#L122), [`ui/dr-ui/src/import.rs:336`](../ui/dr-ui/src/import.rs#L336), [`ui/dr-ui/src/import.rs:584`](../ui/dr-ui/src/import.rs#L584), [`ui/dr-ui/src/import.rs:97`](../ui/dr-ui/src/import.rs#L97), [`ui/dr-ui/src/import_ui.rs:1`](../ui/dr-ui/src/import_ui.rs#L1), [`ui/dr-ui/src/lib.rs:1559`](../ui/dr-ui/src/lib.rs#L1559) |
 | FR-NC-8 | [`core/dr-catalog/src/rating.rs:204`](../core/dr-catalog/src/rating.rs#L204), [`core/dr-catalog/src/rating.rs:66`](../core/dr-catalog/src/rating.rs#L66), [`core/dr-catalog/src/rating.rs:929`](../core/dr-catalog/src/rating.rs#L929), [`core/dr-catalog/src/schema.rs:231`](../core/dr-catalog/src/schema.rs#L231), [`core/dr-pipeline/src/sidecar.rs:137`](../core/dr-pipeline/src/sidecar.rs#L137), [`core/dr-pipeline/src/sidecar.rs:2991`](../core/dr-pipeline/src/sidecar.rs#L2991), [`core/dr-pipeline/src/sidecar.rs:660`](../core/dr-pipeline/src/sidecar.rs#L660), [`core/dr-pipeline/src/sidecar.rs:735`](../core/dr-pipeline/src/sidecar.rs#L735), [`core/dr-pipeline/src/sidecar.rs:96`](../core/dr-pipeline/src/sidecar.rs#L96), [`ui/dr-ui/src/lib.rs:2457`](../ui/dr-ui/src/lib.rs#L2457), [`ui/dr-ui/src/library.rs:1126`](../ui/dr-ui/src/library.rs#L1126), [`ui/dr-ui/src/library.rs:2582`](../ui/dr-ui/src/library.rs#L2582), [`ui/dr-ui/src/library.rs:564`](../ui/dr-ui/src/library.rs#L564), [`ui/dr-ui/src/library.rs:7554`](../ui/dr-ui/src/library.rs#L7554), [`ui/dr-ui/src/library.rs:824`](../ui/dr-ui/src/library.rs#L824), [`ui/dr-ui/src/library_ui.rs:630`](../ui/dr-ui/src/library_ui.rs#L630), [`ui/dr-ui/src/presets.rs:288`](../ui/dr-ui/src/presets.rs#L288), [`ui/dr-ui/src/presets.rs:336`](../ui/dr-ui/src/presets.rs#L336) |
-| FR-NC-9 | [`core/dr-catalog/src/merge.rs:1`](../core/dr-catalog/src/merge.rs#L1), [`core/dr-catalog/src/rating.rs:204`](../core/dr-catalog/src/rating.rs#L204), [`core/dr-catalog/src/rating.rs:66`](../core/dr-catalog/src/rating.rs#L66), [`core/dr-catalog/src/rating.rs:929`](../core/dr-catalog/src/rating.rs#L929), [`core/dr-catalog/src/schema.rs:231`](../core/dr-catalog/src/schema.rs#L231), [`core/dr-catalog/src/schema.rs:644`](../core/dr-catalog/src/schema.rs#L644), [`core/dr-catalog/src/schema.rs:991`](../core/dr-catalog/src/schema.rs#L991), [`core/dr-catalog/src/sync.rs:1`](../core/dr-catalog/src/sync.rs#L1), [`core/dr-pipeline/src/sidecar.rs:192`](../core/dr-pipeline/src/sidecar.rs#L192), [`core/dr-pipeline/src/sidecar.rs:219`](../core/dr-pipeline/src/sidecar.rs#L219), [`core/dr-pipeline/src/sidecar.rs:2520`](../core/dr-pipeline/src/sidecar.rs#L2520), [`core/dr-pipeline/src/sidecar.rs:2757`](../core/dr-pipeline/src/sidecar.rs#L2757), [`core/dr-pipeline/src/sidecar.rs:2991`](../core/dr-pipeline/src/sidecar.rs#L2991), [`core/dr-pipeline/src/sidecar.rs:395`](../core/dr-pipeline/src/sidecar.rs#L395), [`core/dr-pipeline/src/sidecar.rs:493`](../core/dr-pipeline/src/sidecar.rs#L493), [`core/dr-pipeline/src/sidecar.rs:660`](../core/dr-pipeline/src/sidecar.rs#L660), [`core/dr-pipeline/src/sidecar.rs:710`](../core/dr-pipeline/src/sidecar.rs#L710), [`core/dr-pipeline/src/sidecar.rs:735`](../core/dr-pipeline/src/sidecar.rs#L735), [`core/dr-pipeline/src/spot.rs:245`](../core/dr-pipeline/src/spot.rs#L245), [`core/dr-pipeline/tests/mask_sidecar.rs:1075`](../core/dr-pipeline/tests/mask_sidecar.rs#L1075), [`core/dr-pipeline/tests/spot_sidecar.rs:1`](../core/dr-pipeline/tests/spot_sidecar.rs#L1), [`core/dr-sync-nextcloud/src/lib.rs:124`](../core/dr-sync-nextcloud/src/lib.rs#L124), [`core/dr-sync/src/scan.rs:31`](../core/dr-sync/src/scan.rs#L31), [`core/dr-sync/src/scan.rs:56`](../core/dr-sync/src/scan.rs#L56), [`core/dr-sync/src/scan.rs:926`](../core/dr-sync/src/scan.rs#L926), [`core/dr-xmp/src/lib.rs:733`](../core/dr-xmp/src/lib.rs#L733), [`core/dr-xmp/src/lib.rs:746`](../core/dr-xmp/src/lib.rs#L746), [`ui/dr-ui/src/derived_sync.rs:1070`](../ui/dr-ui/src/derived_sync.rs#L1070), [`ui/dr-ui/src/derived_sync.rs:613`](../ui/dr-ui/src/derived_sync.rs#L613), [`ui/dr-ui/src/derived_sync.rs:642`](../ui/dr-ui/src/derived_sync.rs#L642), [`ui/dr-ui/src/derived_sync.rs:675`](../ui/dr-ui/src/derived_sync.rs#L675), [`ui/dr-ui/src/derived_sync.rs:821`](../ui/dr-ui/src/derived_sync.rs#L821), [`ui/dr-ui/src/library.rs:1126`](../ui/dr-ui/src/library.rs#L1126), [`ui/dr-ui/src/library.rs:1146`](../ui/dr-ui/src/library.rs#L1146), [`ui/dr-ui/src/library.rs:1455`](../ui/dr-ui/src/library.rs#L1455), [`ui/dr-ui/src/library.rs:1490`](../ui/dr-ui/src/library.rs#L1490), [`ui/dr-ui/src/library.rs:2582`](../ui/dr-ui/src/library.rs#L2582), [`ui/dr-ui/src/library.rs:7386`](../ui/dr-ui/src/library.rs#L7386), [`ui/dr-ui/src/library.rs:73`](../ui/dr-ui/src/library.rs#L73), [`ui/dr-ui/src/library.rs:7554`](../ui/dr-ui/src/library.rs#L7554), [`ui/dr-ui/src/library.rs:824`](../ui/dr-ui/src/library.rs#L824), [`ui/dr-ui/src/library.rs:896`](../ui/dr-ui/src/library.rs#L896), [`ui/dr-ui/src/library.rs:980`](../ui/dr-ui/src/library.rs#L980), [`ui/dr-ui/src/library_ui.rs:1339`](../ui/dr-ui/src/library_ui.rs#L1339), [`ui/dr-ui/src/presets.rs:288`](../ui/dr-ui/src/presets.rs#L288), [`ui/dr-ui/src/presets.rs:336`](../ui/dr-ui/src/presets.rs#L336), [`ui/dr-ui/src/xmp_sync.rs:1`](../ui/dr-ui/src/xmp_sync.rs#L1), [`ui/dr-ui/src/xmp_sync.rs:287`](../ui/dr-ui/src/xmp_sync.rs#L287) |
+| FR-NC-9 | [`core/dr-catalog/src/merge.rs:1`](../core/dr-catalog/src/merge.rs#L1), [`core/dr-catalog/src/rating.rs:204`](../core/dr-catalog/src/rating.rs#L204), [`core/dr-catalog/src/rating.rs:66`](../core/dr-catalog/src/rating.rs#L66), [`core/dr-catalog/src/rating.rs:929`](../core/dr-catalog/src/rating.rs#L929), [`core/dr-catalog/src/schema.rs:231`](../core/dr-catalog/src/schema.rs#L231), [`core/dr-catalog/src/schema.rs:644`](../core/dr-catalog/src/schema.rs#L644), [`core/dr-catalog/src/schema.rs:991`](../core/dr-catalog/src/schema.rs#L991), [`core/dr-catalog/src/sync.rs:1`](../core/dr-catalog/src/sync.rs#L1), [`core/dr-pipeline/src/sidecar.rs:192`](../core/dr-pipeline/src/sidecar.rs#L192), [`core/dr-pipeline/src/sidecar.rs:219`](../core/dr-pipeline/src/sidecar.rs#L219), [`core/dr-pipeline/src/sidecar.rs:2520`](../core/dr-pipeline/src/sidecar.rs#L2520), [`core/dr-pipeline/src/sidecar.rs:2757`](../core/dr-pipeline/src/sidecar.rs#L2757), [`core/dr-pipeline/src/sidecar.rs:2991`](../core/dr-pipeline/src/sidecar.rs#L2991), [`core/dr-pipeline/src/sidecar.rs:395`](../core/dr-pipeline/src/sidecar.rs#L395), [`core/dr-pipeline/src/sidecar.rs:493`](../core/dr-pipeline/src/sidecar.rs#L493), [`core/dr-pipeline/src/sidecar.rs:660`](../core/dr-pipeline/src/sidecar.rs#L660), [`core/dr-pipeline/src/sidecar.rs:710`](../core/dr-pipeline/src/sidecar.rs#L710), [`core/dr-pipeline/src/sidecar.rs:735`](../core/dr-pipeline/src/sidecar.rs#L735), [`core/dr-pipeline/src/spot.rs:245`](../core/dr-pipeline/src/spot.rs#L245), [`core/dr-pipeline/tests/mask_sidecar.rs:1075`](../core/dr-pipeline/tests/mask_sidecar.rs#L1075), [`core/dr-pipeline/tests/spot_sidecar.rs:1`](../core/dr-pipeline/tests/spot_sidecar.rs#L1), [`core/dr-sync-nextcloud/src/lib.rs:139`](../core/dr-sync-nextcloud/src/lib.rs#L139), [`core/dr-sync/src/scan.rs:31`](../core/dr-sync/src/scan.rs#L31), [`core/dr-sync/src/scan.rs:56`](../core/dr-sync/src/scan.rs#L56), [`core/dr-sync/src/scan.rs:926`](../core/dr-sync/src/scan.rs#L926), [`core/dr-xmp/src/lib.rs:733`](../core/dr-xmp/src/lib.rs#L733), [`core/dr-xmp/src/lib.rs:746`](../core/dr-xmp/src/lib.rs#L746), [`ui/dr-ui/src/derived_sync.rs:1070`](../ui/dr-ui/src/derived_sync.rs#L1070), [`ui/dr-ui/src/derived_sync.rs:613`](../ui/dr-ui/src/derived_sync.rs#L613), [`ui/dr-ui/src/derived_sync.rs:642`](../ui/dr-ui/src/derived_sync.rs#L642), [`ui/dr-ui/src/derived_sync.rs:675`](../ui/dr-ui/src/derived_sync.rs#L675), [`ui/dr-ui/src/derived_sync.rs:821`](../ui/dr-ui/src/derived_sync.rs#L821), [`ui/dr-ui/src/library.rs:1126`](../ui/dr-ui/src/library.rs#L1126), [`ui/dr-ui/src/library.rs:1146`](../ui/dr-ui/src/library.rs#L1146), [`ui/dr-ui/src/library.rs:1455`](../ui/dr-ui/src/library.rs#L1455), [`ui/dr-ui/src/library.rs:1490`](../ui/dr-ui/src/library.rs#L1490), [`ui/dr-ui/src/library.rs:2582`](../ui/dr-ui/src/library.rs#L2582), [`ui/dr-ui/src/library.rs:7386`](../ui/dr-ui/src/library.rs#L7386), [`ui/dr-ui/src/library.rs:73`](../ui/dr-ui/src/library.rs#L73), [`ui/dr-ui/src/library.rs:7554`](../ui/dr-ui/src/library.rs#L7554), [`ui/dr-ui/src/library.rs:824`](../ui/dr-ui/src/library.rs#L824), [`ui/dr-ui/src/library.rs:896`](../ui/dr-ui/src/library.rs#L896), [`ui/dr-ui/src/library.rs:980`](../ui/dr-ui/src/library.rs#L980), [`ui/dr-ui/src/library_ui.rs:1339`](../ui/dr-ui/src/library_ui.rs#L1339), [`ui/dr-ui/src/presets.rs:288`](../ui/dr-ui/src/presets.rs#L288), [`ui/dr-ui/src/presets.rs:336`](../ui/dr-ui/src/presets.rs#L336), [`ui/dr-ui/src/xmp_sync.rs:1`](../ui/dr-ui/src/xmp_sync.rs#L1), [`ui/dr-ui/src/xmp_sync.rs:287`](../ui/dr-ui/src/xmp_sync.rs#L287) |
 | FR-PLAT-AND-2 | [`core/dr-catalog/src/walk.rs:1022`](../core/dr-catalog/src/walk.rs#L1022), [`core/dr-catalog/src/walk.rs:435`](../core/dr-catalog/src/walk.rs#L435), [`core/dr-sync-folder/src/lib.rs:242`](../core/dr-sync-folder/src/lib.rs#L242), [`core/dr-sync-folder/src/tests.rs:51`](../core/dr-sync-folder/src/tests.rs#L51), [`core/dr-sync/src/error.rs:113`](../core/dr-sync/src/error.rs#L113), [`core/dr-sync/src/error.rs:195`](../core/dr-sync/src/error.rs#L195), [`core/dr-sync/src/scan.rs:211`](../core/dr-sync/src/scan.rs#L211), [`core/dr-sync/src/scan.rs:519`](../core/dr-sync/src/scan.rs#L519), [`core/dr-sync/src/scan.rs:545`](../core/dr-sync/src/scan.rs#L545), [`core/dr-sync/src/scan.rs:574`](../core/dr-sync/src/scan.rs#L574), [`ui/dr-ui/src/library.rs:1355`](../ui/dr-ui/src/library.rs#L1355), [`ui/dr-ui/src/library.rs:1408`](../ui/dr-ui/src/library.rs#L1408), [`ui/dr-ui/src/library.rs:1439`](../ui/dr-ui/src/library.rs#L1439), [`ui/dr-ui/src/library.rs:2019`](../ui/dr-ui/src/library.rs#L2019), [`ui/dr-ui/src/library_ui.rs:1310`](../ui/dr-ui/src/library_ui.rs#L1310), [`ui/dr-ui/src/library_ui.rs:1406`](../ui/dr-ui/src/library_ui.rs#L1406), [`ui/dr-ui/src/library_ui.rs:2005`](../ui/dr-ui/src/library_ui.rs#L2005), [`ui/dr-ui/src/library_ui.rs:328`](../ui/dr-ui/src/library_ui.rs#L328), [`ui/dr-ui/src/library_ui.rs:573`](../ui/dr-ui/src/library_ui.rs#L573) |
 | FR-PLAT-AND-3 | [`core/dr-catalog/src/jobs.rs:1`](../core/dr-catalog/src/jobs.rs#L1), [`core/dr-catalog/src/runner.rs:1`](../core/dr-catalog/src/runner.rs#L1) |
 | FR-PLAT-AND-4 | [`core/dr-catalog/src/runner.rs:1`](../core/dr-catalog/src/runner.rs#L1) |