fix(i18n): complete Simplified Chinese core and plugin translations (#1542)

* fix(i18n): complete Chinese onboarding and navigation labels

* fix(i18n): translate remaining Chinese core and plugin interfaces

* fix(i18n): translate host editor tab overflow controls

* fix(i18n): use consistent Chinese fleet terminology

* fix(i18n): localize hardcoded controls and plugin views

* fix(i18n): translate built-in homepage widget catalog

* test(homepage): follow translated timezone placeholder

* fix(i18n): translate plugin-provided homepage widgets

* fix(i18n): localize feature settings section titles

plugins/homepage/src/frontend/dialogs/AddWidgetMenu.tsx

@@ -140,14 +140,18 @@ export function AddWidgetMenu({ state, onAdd, onClose }: AddWidgetMenuProps) {
                   {type.labelComponent ? (
                     <type.labelComponent part="name" />
                   ) : (
-                    type.name
+                    t(`homepage.widgets.${type.id}.name`, {
+                      defaultValue: type.name,
+                    })
                   )}
                 </span>
                 <span className="text-[10px] text-muted-foreground truncate">
                   {type.labelComponent ? (
                     <type.labelComponent part="description" />
                   ) : (
-                    type.description
+                    t(`homepage.widgets.${type.id}.description`, {
+                      defaultValue: type.description,
+                    })
                   )}
                 </span>
               </div>

plugins/homepage/src/frontend/dialogs/ClockEditForm.tsx

@@ -23,7 +23,7 @@ export function ClockEditForm({
           onChange={(e) =>
             onChange({ ...config, timezone: e.target.value || undefined })
           }
-          placeholder="America/New_York (leave blank for local)"
+          placeholder={t("homepage.timezonePlaceholder")}
           aria-invalid={invalidTimezone}
           className={
             invalidTimezone ? "h-8 text-sm border-destructive" : "h-8 text-sm"

plugins/homepage/src/frontend/dialogs/NotesEditForm.tsx

@@ -16,7 +16,7 @@ export function NotesEditForm({
         <Textarea
           value={config.content}
           onChange={(e) => onChange({ ...config, content: e.target.value })}
-          placeholder="Write your notes here..."
+          placeholder={t("homepage.notesPlaceholder")}
           className="text-sm min-h-[120px] resize-none rounded-none"
         />
       </div>

plugins/homepage/src/frontend/dialogs/WeatherEditForm.tsx

@@ -17,7 +17,7 @@ export function WeatherEditForm({
         <Input
           value={config.location}
           onChange={(e) => onChange({ ...config, location: e.target.value })}
-          placeholder="New York, London, Tokyo..."
+          placeholder={t("homepage.locationPlaceholder")}
           className="h-8 text-sm"
         />
       </div>