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.

bal/cli/commands.py

@@ -238,24 +238,26 @@ async def willexecutors_update(
         wallet,
         "willexecutors_update",
         url,
-        address,
-        base_fee,
-        info,
-        promo_code,
-        rename_to,
+        address=address,
+        base_fee=base_fee,
+        info=info,
+        promo_code=promo_code,
+        rename_to=rename_to,
     )
 
 
 @plugin_command("nw", plugin_name)
 async def willexecutors_select(
-    self, url, value=True, wallet=None, plugin=None
+    self, url=None, value=True, only_valid=False, wallet=None, plugin=None
 ):
-    """Select (or deselect) a will-executor.
+    """Select (or deselect) a will-executor, or bulk-apply a selection.
 
-    arg:str:url:The will-executor URL.
+    arg:str:url:The will-executor URL; omit to act on every executor.
     arg:bool:value:True to select, False to deselect.
+    arg:bool:only_valid:When selecting/deselecting all, only change the valid executors (the invalid ones are deselected/left alone).
     """
-    return _call(plugin, wallet, "willexecutors_select", [url], value)
+    urls = [url] if url is not None else None
+    return _call(plugin, wallet, "willexecutors_select", urls, value, only_valid)
 
 
 @plugin_command("nw", plugin_name)
@@ -298,12 +300,13 @@ async def willexecutors_import(self, path, wallet=None, plugin=None):
 
 
 @plugin_command("nw", plugin_name)
-async def willexecutors_export(self, path, wallet=None, plugin=None):
+async def willexecutors_export(self, path, subset=None, wallet=None, plugin=None):
     """Export the will-executors to a JSON file.
 
     arg:str:path:Destination file path.
+    arg:str:subset:Optional filter: ``selected`` (only selected executors) or ``valid`` (only valid ones); omit to export all.
     """
-    return _call(plugin, wallet, "willexecutors_export", path)
+    return _call(plugin, wallet, "willexecutors_export", path, subset)
 
 
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