feat(import): bring the account's own mood vocabulary along

A full backup carries the account's own mood tags, rated factors and
tag groups, and the JSON import left them out: a mood entry imported
into another account landed without every link to a tag the person had
made.

Before the entries are written, every key they or the file name is
resolved once. A catalogue tag or one the account owns is used as it
is; an own tag whose label the file states differently is kept, never
overwritten, and named in keptMoodTagKeys (keptMoodCategoryKeys for a
group). A tag the file defines and the account lacks is created in its
group, the group created the same way, within the account's caps of 50
tags and 12 groups. A key another account of the server holds comes
over under a key derived from the account and the file's key, so a
second import of the same file finds the copy instead of minting
another. The links are written through that resolution, own rated
factors included, inside the entry's transaction; anything unresolved
is still dropped and named. The import card names kept keys in all
nine locales.

The field-coverage guard now holds the backup's customMoodTags and
customMoodTagCategories to the import schema. The round trip moves a
backup to another server (the same seeded catalogue, none of the
account's rows), imports it into a fresh account and compares the
re-export, own tags, group and rated factor included; a second case
imports into another account of the same server, and a third keeps a
renamed own tag.

src/components/settings/import-panel/__tests__/json-import-result.test.tsx

@@ -38,9 +38,22 @@ describe("<JsonImportResultView>", () => {
     expect(html).toContain("Imported 3 measurements and 2 mood entries");
   });
 
+  it("names the account's own tags it kept rather than renamed", () => {
+    const html = render({
+      measurements: 0,
+      moodEntries: 2,
+      skipped: 0,
+      keptMoodTagKeys: ["custom:walk"],
+      keptMoodCategoryKeys: ["customcat:outdoors"],
+    });
+    expect(html).toContain('data-testid="import-json-kept-labels"');
+    expect(html).toContain("custom:walk, customcat:outdoors");
+  });
+
   it("says nothing about links when every one landed", () => {
     const html = render({ measurements: 3, moodEntries: 2, skipped: 0 });
     expect(html).not.toContain("import-json-dropped-links");
+    expect(html).not.toContain("import-json-kept-labels");
   });
 
   it("reads a missing count as none", () => {
@@ -49,6 +62,7 @@ describe("<JsonImportResultView>", () => {
       moodEntries: 0,
       skipped: 0,
       droppedLinkKeys: [],
+      keptLabelKeys: [],
     });
   });
 });

src/components/settings/import-panel/json-import-card.tsx

@@ -28,6 +28,11 @@ export interface JsonImportResult {
    * those links, which the count alone would not say.
    */
   droppedLinkKeys: string[];
+  /**
+   * Keys of the account's own tags and groups the file names differently.
+   * The account's names were kept, never overwritten.
+   */
+  keptLabelKeys: string[];
 }
 
 /** The route's `data`, read field by field; a missing count reads as none. */
@@ -38,6 +43,8 @@ export function readJsonImportResult(
     skipped?: number;
     droppedTagKeys?: string[];
     droppedFactorKeys?: string[];
+    keptMoodTagKeys?: string[];
+    keptMoodCategoryKeys?: string[];
   } | null,
 ): JsonImportResult {
   return {
@@ -48,6 +55,10 @@ export function readJsonImportResult(
       ...(data?.droppedTagKeys ?? []),
       ...(data?.droppedFactorKeys ?? []),
     ],
+    keptLabelKeys: [
+      ...(data?.keptMoodTagKeys ?? []),
+      ...(data?.keptMoodCategoryKeys ?? []),
+    ],
   };
 }
 
@@ -96,6 +107,16 @@ export function JsonImportResultView({ result }: { result: JsonImportResult }) {
           })}
         </p>
       )}
+      {result.keptLabelKeys.length > 0 && (
+        <p
+          className="text-muted-foreground text-xs"
+          data-testid="import-json-kept-labels"
+        >
+          {t("settings.sections.export.import.json.keptLabels", {
+            keys: result.keptLabelKeys.join(", "),
+          })}
+        </p>
+      )}
     </>
   );
 }