feat(fileDto, folderDto): add is_favorite + is_shared

- provide is_shared and is_favorite information in DTO, information propagated as badge/buttons per items
      regarding performances I try to be minimalis on SQL to prevent any perf regression

    - remove old set of sharedids and favoriteids (was not functionnal anymore)
    - fix date picker (no past selection) in grant
    - fix contextmenu close on /files section

src/application/dtos/favorites_dto.rs

@@ -132,6 +132,14 @@ pub struct FavoriteResourceRow {
     pub created_by: Option<Uuid>,
     /// §14 provenance — who last touched the row.
     pub updated_by: Option<Uuid>,
+    /// Caller-scoped favorite state — `TRUE` by construction on this
+    /// listing (every row IS a favorite). The listing SQL hardcodes
+    /// `TRUE AS is_favorite`; this field stays here so the DTO builder
+    /// signature stays symmetric with the other listings.
+    pub is_favorite: bool,
+    /// Resource-scoped: `true` when the row has any `storage.role_grants`
+    /// entry. Computed by a per-row `EXISTS` in the listing SQL.
+    pub is_shared: bool,
     /// `true` when `owner_id == requesting user_id`.
     pub is_owner: bool,
     pub favorited_at: DateTime<Utc>,

src/application/dtos/file_dto.rs

@@ -83,6 +83,25 @@ pub struct FileDto {
     /// stub/legacy files.
     #[serde(skip_serializing_if = "Option::is_none")]
     pub updated_by: Option<Uuid>,
+
+    /// Caller-scoped: `true` when the requesting user has favorited
+    /// this file. **Wire contract: always present**, never null and
+    /// never absent — the SPA reads it as a required `boolean` with no
+    /// nullish branch. Every emission path (listing endpoints inline
+    /// via a per-row `EXISTS` in the listing SQL; single-item endpoints
+    /// via the shared `caller_flags` helper on the favorites port) is
+    /// responsible for populating this before the DTO reaches the
+    /// wire. WebDAV/CalDAV/CardDAV DTOs default to `false` — the XML
+    /// property serializer drops the field entirely, so a stale
+    /// default is never observable on those surfaces.
+    pub is_favorite: bool,
+
+    /// Resource-scoped: `true` when the file has ANY explicit
+    /// role-grant on it (link share via `subject_type = 'token'`,
+    /// user/group grant, any role). "Someone was given access to
+    /// this beyond drive membership." Same wire contract as
+    /// `is_favorite` — always present.
+    pub is_shared: bool,
 }
 
 impl From<File> for FileDto {
@@ -132,6 +151,11 @@ impl From<File> for FileDto {
             etag,
             created_by: parts.created_by,
             updated_by: parts.updated_by,
+            // `From<File>` has no caller context. Callers that will
+            // emit the DTO to the SPA MUST override these before
+            // Json emission via the `caller_flags` helper.
+            is_favorite: false,
+            is_shared: false,
         }
     }
 }
@@ -189,6 +213,8 @@ impl FileDto {
             sort_date: None,
             created_by: None,
             updated_by: None,
+            is_favorite: false,
+            is_shared: false,
         }
     }
 }

src/application/dtos/folder_dto.rs

@@ -96,6 +96,17 @@ pub struct FolderDto {
     /// stub/legacy folders.
     #[serde(skip_serializing_if = "Option::is_none")]
     pub updated_by: Option<Uuid>,
+
+    /// Caller-scoped: `true` when the requesting user has favorited
+    /// this folder. See `FileDto::is_favorite` for the full wire
+    /// contract note (always present, never null; enrichment path
+    /// covers listing rows via inline `EXISTS` and single-item
+    /// endpoints via the `caller_flags` helper).
+    pub is_favorite: bool,
+
+    /// Resource-scoped: `true` when the folder has ANY explicit
+    /// role-grant on it. Same wire contract as `is_favorite`.
+    pub is_shared: bool,
 }
 
 impl From<Folder> for FolderDto {
@@ -127,6 +138,11 @@ impl From<Folder> for FolderDto {
             etag,
             created_by: parts.created_by,
             updated_by: parts.updated_by,
+            // `From<Folder>` has no caller context. Handlers that
+            // emit to the SPA MUST override via `caller_flags` before
+            // Json response.
+            is_favorite: false,
+            is_shared: false,
         }
     }
 }
@@ -179,6 +195,8 @@ impl FolderDto {
             etag: String::new(),
             created_by: None,
             updated_by: None,
+            is_favorite: false,
+            is_shared: false,
         }
     }
 }
@@ -226,6 +244,16 @@ pub struct FolderResourceRow {
     pub created_by: Option<Uuid>,
     /// §14 provenance — who last touched the row.
     pub updated_by: Option<Uuid>,
+    /// Caller-scoped: `true` when the requesting user has favorited
+    /// this row. Populates `FileDto::is_favorite` / `FolderDto::is_favorite`
+    /// on the listing without a follow-up query. Computed by the
+    /// per-row `EXISTS` in `list_resources_paged`.
+    pub is_favorite: bool,
+    /// Resource-scoped: `true` when the row has any `storage.role_grants`
+    /// entry — link share (`subject_type = 'token'`), user grant, group
+    /// grant, or any role. Populates `FileDto::is_shared` /
+    /// `FolderDto::is_shared`.
+    pub is_shared: bool,
     // Pre-computed sort fields — returned by the SQL for cursor construction.
     /// `LOWER(name)` used by `name`/`type` sorts.
     pub sort_str: String,

src/application/dtos/recent_dto.rs

@@ -122,6 +122,14 @@ pub struct RecentResourceRow {
     /// consumed by the UI but surfaced for API parity with the other
     /// listing endpoints.
     pub updated_by: Option<Uuid>,
+    /// Caller-scoped: `true` when the requesting user has favorited
+    /// this row. Populates `FileDto::is_favorite` /
+    /// `FolderDto::is_favorite` on this listing via a per-row
+    /// `EXISTS` in the SQL.
+    pub is_favorite: bool,
+    /// Resource-scoped: `true` when the row has any
+    /// `storage.role_grants` entry.
+    pub is_shared: bool,
     /// `true` when `owner_id == requesting user_id`.
     pub is_owner: bool,
     pub accessed_at: DateTime<Utc>,

src/application/dtos/trash_dto.rs

@@ -77,6 +77,13 @@ pub struct TrashResourceRow {
     /// §14 provenance — who last touched the row (includes the trash
     /// action itself, which stamps `updated_by = caller_id`).
     pub updated_by: Option<Uuid>,
+    /// Caller-scoped: `true` when the caller has favorited this
+    /// trashed item.
+    pub is_favorite: bool,
+    /// Resource-scoped: `true` when the row has any
+    /// `storage.role_grants` entry (surviving trash — grants are
+    /// GC'd by `purge_expired_grants` on the 15-day grace).
+    pub is_shared: bool,
     pub trashed_at: DateTime<Utc>,
     pub deletion_date: DateTime<Utc>,
     /// Original location path (for folders: `path`; for files: `parent.path || '/' || name`).