revert(import): drop the plural count keys

Removes com_ui_import_assets_one, com_ui_import_errors_one,
com_ui_import_report_assets_one, com_ui_import_report_one and
com_ui_import_stat_conversations_one, and returns the call sites to
positional interpolation so no key is left referencing {{count}}.

client/src/components/Nav/SettingsTabs/Data/Import/Progress.tsx

@@ -62,14 +62,14 @@ export default function Progress({ job, onCancel, onReset, isCancelling }: Progr
             <>
               <p className="text-text-secondary">
                 {localize('com_ui_import_report', {
-                  count: job.report.imported,
-                  skipped: job.report.skipped,
+                  0: job.report.imported,
+                  1: job.report.skipped,
                 })}
               </p>
               <p className="text-text-secondary">
                 {localize('com_ui_import_report_assets', {
-                  count: job.report.assetsImported,
-                  unavailable: job.report.assetsUnavailable,
+                  0: job.report.assetsImported,
+                  1: job.report.assetsUnavailable,
                 })}
               </p>
             </>
@@ -116,7 +116,7 @@ export default function Progress({ job, onCancel, onReset, isCancelling }: Progr
       {isTerminal && job.report && job.report.errors.length > 0 && (
         <details>
           <summary className="cursor-pointer text-sm text-text-secondary">
-            {localize('com_ui_import_errors', { count: job.report.errors.length })}
+            {localize('com_ui_import_errors', { 0: job.report.errors.length })}
           </summary>
           <ul className="mt-2 list-inside list-disc text-sm text-text-secondary">
             {job.report.errors.map((error, index) => (

client/src/components/Nav/SettingsTabs/Data/Import/Summary.tsx

@@ -57,11 +57,11 @@ export default function Summary({
         {localize('com_ui_import_detected', { 0: sourceLabel })}
       </h3>
       <ul className="grid grid-cols-2 gap-x-4 gap-y-2 text-sm text-text-secondary">
-        <li>{localize('com_ui_import_stat_conversations', { count: summary.conversations })}</li>
+        <li>{localize('com_ui_import_stat_conversations', { 0: summary.conversations })}</li>
         <li>
           {localize('com_ui_import_assets', {
-            count: summary.assets,
-            size: formatAssetSize(summary.assetBytes),
+            0: summary.assets,
+            1: formatAssetSize(summary.assetBytes),
           })}
         </li>
         <li>{localize('com_ui_import_stat_archived', { 0: summary.archived })}</li>

client/src/components/Nav/SettingsTabs/Data/Import/__tests__/Import.spec.tsx

@@ -381,14 +381,13 @@ describe('Import panel', () => {
 
     render(<Import />);
     /* Exactly once: the count is the <details> summary. It used to also be
-       repeated in the status block above, which this assertion enshrined.
-       Singular, because a single failure is one item, not "1 items". */
-    expect(screen.getAllByText(/^1 item could not be imported$/i)).toHaveLength(1);
+       repeated in the status block above, which this assertion enshrined. */
+    expect(screen.getAllByText(/^1 items could not be imported$/i)).toHaveLength(1);
     expect(screen.getByText(/conversation 11 malformed/i)).toBeInTheDocument();
     expect(screen.getByText(/archive truncated/i)).toBeInTheDocument();
   });
 
-  it('pluralizes the error count for more than one failure', () => {
+  it('shows the error count for more than one failure', () => {
     dataProvider.useImportJobQuery.mockReturnValue({
       data: job({
         phase: 'failed',
@@ -408,27 +407,6 @@ describe('Import panel', () => {
     expect(screen.getByText(/^2 items could not be imported$/i)).toBeInTheDocument();
   });
 
-  it('pluralizes the report counts, so a single conversation is not "1 conversations"', () => {
-    dataProvider.useImportJobQuery.mockReturnValue({
-      data: job({
-        phase: 'completed',
-        status: 'completed',
-        report: {
-          imported: 1,
-          skipped: 0,
-          assetsImported: 1,
-          assetsUnavailable: 0,
-          errors: [],
-        },
-      }),
-    });
-
-    render(<Import />);
-
-    expect(screen.getByText('1 conversation imported, 0 skipped')).toBeInTheDocument();
-    expect(screen.getByText('1 attachment imported, 0 unavailable')).toBeInTheDocument();
-  });
-
   it('moves focus back to the import control after starting another import', () => {
     dataProvider.useImportJobQuery.mockReturnValue({
       data: job({

client/src/locales/en/translation.json

@@ -1286,8 +1286,7 @@
   "com_ui_image_gen_failed": "Image generation failed",
   "com_ui_import": "Import",
   "com_ui_import_another": "Import another file",
-  "com_ui_import_assets": "{{count}} attachments ({{size}})",
-  "com_ui_import_assets_one": "{{count}} attachment ({{size}})",
+  "com_ui_import_assets": "{{0}} attachments ({{1}})",
   "com_ui_import_cancel": "Cancel import",
   "com_ui_import_cancelled": "Import cancelled",
   "com_ui_import_conversation_error": "There was an error importing your data",
@@ -1296,22 +1295,18 @@
   "com_ui_import_conversation_upload_error": "Error uploading file. Please try again.",
   "com_ui_import_detected": "Detected {{0}} export",
   "com_ui_import_drop": "Drop your export here to import",
-  "com_ui_import_errors": "{{count}} items could not be imported",
-  "com_ui_import_errors_one": "{{count}} item could not be imported",
+  "com_ui_import_errors": "{{0}} items could not be imported",
   "com_ui_import_lost": "This import could not be found. It may have already finished or expired.",
   "com_ui_import_phase_assets": "Importing attachments",
   "com_ui_import_phase_conversations": "Importing conversations",
   "com_ui_import_progress_of": "{{0}} of {{1}}",
-  "com_ui_import_report": "{{count}} conversations imported, {{skipped}} skipped",
-  "com_ui_import_report_assets": "{{count}} attachments imported, {{unavailable}} unavailable",
-  "com_ui_import_report_assets_one": "{{count}} attachment imported, {{unavailable}} unavailable",
-  "com_ui_import_report_one": "{{count}} conversation imported, {{skipped}} skipped",
+  "com_ui_import_report": "{{0}} conversations imported, {{1}} skipped",
+  "com_ui_import_report_assets": "{{0}} attachments imported, {{1}} unavailable",
   "com_ui_import_source_chatgpt": "ChatGPT",
   "com_ui_import_source_claude": "Claude",
   "com_ui_import_source_grok": "Grok",
   "com_ui_import_stat_archived": "{{0}} archived",
-  "com_ui_import_stat_conversations": "{{count}} conversations",
-  "com_ui_import_stat_conversations_one": "{{count}} conversation",
+  "com_ui_import_stat_conversations": "{{0}} conversations",
   "com_ui_import_stat_starred": "{{0}} starred",
   "com_ui_importing": "Importing",
   "com_ui_include_shadcnui": "Include shadcn/ui components instructions",