gui+cli+core: anticipated-delivery warning, task #67 amount checks, CLI tools

GUI - "Building your will" row (owner request):
- when a rebuild anticipates the delivery date by one day, show
  "Anticipated - new delivery date: <date>" on the "Building your will" row
  instead of a plain "Ok";
- the detection compares the will's minimum locktime BEFORE and AFTER the
  rebuild, so it also covers relative recipes ("1y"/"30d") that the previous
  stored-vs-built comparison missed;
- the sign explanation stays on its own "Signing your will" row so it no
  longer overwrites the anticipation warning.

Task #67 - "Checking variables" stuck on "Wait":
- core: Will.check_amounts only requires a fixed amount to be funded when it
  is > 0, and only requires percentages to total 100% when the will actually
  has percentage heirs; fixed-only / empty-wallet wills no longer raise;
- gui: the amount warning is written on the "Checking variables" row itself
  (COLOR_WARNING) instead of being overwritten by the next row; the redundant
  "adjustment of the amounts" sentence was dropped.

CLI - will-executor helpers:
- willexecutors_update accepts promo_code;
- willexecutors_select supports bulk apply with only_valid;
- willexecutors_export supports selected/valid subsets;
- import overwrites existing records with sane defaults;
- raise NoServersForChainError with a clear user-facing message; map
  NotCompleteWill / HeirChange / WillexecutorChange in _user_facing.

Tests and docs:
- tests for the anticipation row, the CLI helpers and the amount checks;
- i18n catalogs refreshed; CHANGELOG section 67; agent task memory updated.

CHANGELOG.md

@@ -3759,3 +3759,64 @@ into children that are still present in the will.
 clean on the touched files.
 
 **Outcome:** DONE.
+
+---
+
+## 67. "Checking variables" stuck on "Wait" + redundant amount-adjustment wording
+
+**Date:** 2026-10-14
+
+**Symptom (owner report):** in the "Building Will" dialog the "Checking
+variables" row always stayed on "Wait" and never became "Ok", even though the
+will itself was fine ("Checking your will" showed "Ok"). It should show its
+result before the "Checking your will" row is written.
+
+**Root cause (two bugs):**
+
+1. UI - when `Will.check_amounts` raised `AmountException` /
+   `WillExecutorFeeTooHighException`, `BalBuildWillDialog.task_phase1` wrote the
+   warning to the **"Checking your will"** row (`msg_set_checking(...)`) and the
+   very next `self.msg_set_checking()` call immediately overwrote it. So on an
+   amount warning the warning was lost AND the "Checking variables" row kept its
+   initial "Wait" forever (the success path set "Ok" only when the amount check
+   passed).
+2. Core - `Will.check_amounts` had two false positives that made perfectly valid
+   wills raise:
+   - `fixed_amount >= wallet_balance` also fired when `fixed_amount == 0`
+     (all-percentage or empty/fully-committed wallet: `0 >= 0`);
+   - `perc_amount != 100` also fired when the will has NO percentage heirs at
+     all (a fixed-only will reports `perc_amount == 0`).
+
+**What changed:**
+
+- `bal/gui/qt/dialogs.py` (`task_phase1`, AmountException branch): the warning is
+  now written on the **"Checking variables"** row itself with `COLOR_WARNING`, so
+  the row always reaches a real outcome and the warning is never lost. The
+  wording was also reduced to the first sentence only - "In the inheritance
+  process, the entire wallet will always be fully emptied." - dropping
+  "Your settings require an adjustment of the amounts" (owner request).
+- `bal/gui/qt/window.py` (`build_inheritance_transaction`, AmountException
+  branch): same message reduction; the appended exception detail (`.format(e)`)
+  was removed with the sentence it belonged to.
+- `bal/core/will.py` (`check_amounts`): the fixed-amount checks now only apply
+  when `fixed_amount > 0`, and the 100% check only when the will actually has
+  percentage heirs (`perc_heirs`). Valid fixed-only / empty-wallet wills no
+  longer raise.
+- i18n catalogs refreshed (`pybabel extract` + `update`); the new unified msgid
+  "In the inheritance process, the entire wallet will always be fully emptied."
+  is translated in `it_IT` and `es_ES`; the old
+  "...adjustment of the amounts.{}" entry is now obsolete.
+
+**Verification:**
+
+- `Will.check_amounts` matrix (fixed-only/percentage/empty wallet) behaves as
+  expected; core/offline suites plus `test_gui_prepare_will_history.py`,
+  `test_sync_locktime_built_txs.py`, `test_rebuild_on_close_setting.py`,
+  `test_translations.py` and the smoke test pass.
+- Offscreen repro of `task_phase1`: "Checking variables" shows green "Ok" on
+  success and the (shortened) warning on the row on `AmountException` - never
+  "Wait".
+- `py_compile` clean; `ruff check` adds no new violations (only the pre-existing
+  `I001` in `dialogs.py`).
+
+**Outcome:** DONE (pending the owner's test of the ZIP).