#566 clean up My Orders page (3 removals)

Per user request on the طلباتي page:

1. Removed the "Clear finished orders" bulk button entirely. The button
   was showing as a raw i18n key (myOrder c...) for the user and they
   asked for it gone. Dropped the related AlertDialog, confirmClearOpen
   state, handleClearFinished handler, and the locale keys
   clearFinished_*, clearConfirmTitle/Body_*, clearConfirm,
   clearedCount_*, and clearedPartial in both ar.json and en.json.

2. Removed the "تراجع / Undo" ToastAction shown after deleting an
   order. The toast now displays only the "Order deleted" title; the
   7-second timer + pendingDeleteIds soft-delete window is preserved
   so the actual DELETE still fires after the grace period. The undo
   closure was deleted since nothing references it anymore. Single-id
   call site stays untouched (scheduleDelete still receives [id]).

3. Removed the "ستتاح لك ثوانٍ قليلة للتراجع" description from the
   cancel-order confirmation dialog. The cancelConfirmBody key was
   dropped from both locales. The AlertDialog now shows only the
   title + the two action buttons.

Out of scope (kept as-is):
- The undo ToastAction after CANCEL (user only asked about delete).
- Incoming-orders page.

Notes:
- ToastAction import is still used by the cancel-undo path.
- Trash2 import still used by the per-card delete button.
- Pre-existing TS error in use-push-subscription.ts is unrelated.

artifacts/tx-os/src/locales/en.json

@@ -127,7 +127,6 @@
     "notesLabel": "Notes:",
     "cancel": "Cancel order",
     "cancelConfirmTitle": "Cancel this order?",
-    "cancelConfirmBody": "You'll have a few seconds to undo this.",
     "cancelConfirm": "Yes, cancel",
     "keep": "Keep it",
     "cancelled": "Order cancelled",
@@ -141,16 +140,7 @@
     "deleted": "Order deleted",
     "deleteFailed": "Could not delete the order",
     "undo": "Undo",
-    "undone": "Restored",
-    "clearFinished_one": "Clear 1 finished",
-    "clearFinished_other": "Clear {{count}} finished",
-    "clearConfirmTitle": "Clear finished orders?",
-    "clearConfirmBody_one": "1 finished order will be permanently removed from your history.",
-    "clearConfirmBody_other": "{{count}} finished orders will be permanently removed from your history.",
-    "clearConfirm": "Yes, clear",
-    "clearedCount_one": "1 order deleted",
-    "clearedCount_other": "{{count}} orders deleted",
-    "clearedPartial": "{{ok}} deleted, {{fail}} failed"
+    "undone": "Restored"
   },
   "orderStatus": {
     "pending": "Awaiting receiver",