UI polish and signed-tx colour fix (v0.3.3)

Fix and refine the BAL plugin GUI without changing business logic:

core/will.py: restore the PUSHED requirement in needs_server_check so a
signed-but-not-broadcast will is no longer server-queried and therefore
stays blue (COMPLETE) instead of turning red (CHECK_FAIL). This matches the
original Gitea check() condition.

gui/qt/widgets.py: WillSettingsWidget vertical layout now caps every row to
the widest date-row width and left-aligns them; the leading icons keep their
original HelpButton width.

gui/qt/lists.py + gui/qt/common.py: the wizard toolbar button now shows a
28x28 icon plus a bold 'Create your will' caption (QSize imported).

gui/qt/dialogs.py (BalBuildWillDialog):
- closing summary row labelled 'All done: Ok' with a blank separator above it;
- 'checking variables' capitalised to 'Checking variables' (redundant trailing
  colon dropped);
- final auto-closing countdown replaced by an explicit right-aligned 'Close'
  button; intermediate technical pauses kept; next-steps popup preserved.

gui/qt/window.py + core/plugin_base.py: guide show_message on build, and
sync_hide_filters() in update_all so hide flags refresh immediately.

tests: test_needs_server_check updated; added offscreen preview helpers.
Version bumped to 0.3.3. 186 tests pass; ruff clean (baseline only).

tests/preview_wizard_button.py

@@ -0,0 +1,139 @@
+#!/usr/bin/env python3
+"""Visual PREVIEW: proposals to make the Wizard button more visible.
+
+Renders the toolbar Wizard button (using the real icons/wizard.png) in several
+styles so the user can pick one.  Nothing is changed in the plugin yet.
+
+Variants:
+  0. CURRENT  : icon only, default size (what ships today).
+  A. BIGGER   : same icon, larger button + larger iconSize.
+  B. ICON+TEXT: bigger icon plus a "Create your will" label.
+  C. ACCENT   : icon + text on a colored (Bitcoin-orange) rounded button.
+  D. ACCENT-BLUE: icon + text on a BAL-blue (#2bc8ed) rounded button.
+
+Run:
+    QT_QPA_PLATFORM=offscreen python3 tests/preview_wizard_button.py
+Writes preview_wizardbtn_<id>.png in the repo root.
+"""
+
+import os
+
+os.environ.setdefault("QT_QPA_PLATFORM", "offscreen")
+
+from PyQt6.QtWidgets import (  # noqa: E402
+    QApplication, QWidget, QHBoxLayout, QPushButton, QComboBox, QLineEdit,
+    QLabel,
+)
+from PyQt6.QtGui import QIcon, QPixmap  # noqa: E402
+from PyQt6.QtCore import QSize, Qt  # noqa: E402
+
+ICON_PATH = os.path.join(os.path.dirname(__file__), "..", "bal", "icons",
+                        "wizard.png")
+
+
+def _icon():
+    pm = QPixmap(ICON_PATH)
+    return QIcon(pm)
+
+
+def _toolbar_tail(parent):
+    """The widgets that sit to the right of the wizard button, for context."""
+    out = []
+    icon = QPushButton(parent)
+    icon.setText("📅")
+    combo = QComboBox(parent)
+    combo.addItems(["Raw", "Date"])
+    combo.setCurrentIndex(1)
+    field = QLineEdit("04/06/2028 00:00", parent)
+    field.setFixedWidth(140)
+    out += [icon, combo, field]
+    return out
+
+
+def _frame(make_wizard, label):
+    panel = QWidget()
+    v = QHBoxLayout(panel)
+    v.setContentsMargins(10, 10, 10, 10)
+    tag = QLabel(label, panel)
+    tag.setFixedWidth(120)
+    v.addWidget(tag)
+    wiz = make_wizard(panel)
+    v.addWidget(wiz)
+    for w in _toolbar_tail(panel):
+        v.addWidget(w)
+    v.addStretch(1)
+    panel.resize(720, 70)
+    return panel
+
+
+# ---- variants -------------------------------------------------------------
+def v_current(parent):
+    b = QPushButton(parent)
+    b.setIcon(_icon())
+    b.setToolTip("Wizard - Build your will")
+    return b
+
+
+def v_bigger(parent):
+    b = QPushButton(parent)
+    b.setIcon(_icon())
+    b.setIconSize(QSize(36, 36))
+    b.setFixedSize(48, 44)
+    b.setToolTip("Wizard - Build your will")
+    return b
+
+
+def v_icon_text(parent):
+    b = QPushButton("  Create your will", parent)
+    b.setIcon(_icon())
+    b.setIconSize(QSize(28, 28))
+    b.setMinimumHeight(40)
+    b.setStyleSheet("QPushButton{font-weight:bold;}")
+    return b
+
+
+def v_accent_orange(parent):
+    b = QPushButton("  Create your will", parent)
+    b.setIcon(_icon())
+    b.setIconSize(QSize(28, 28))
+    b.setMinimumHeight(40)
+    b.setStyleSheet(
+        "QPushButton{background-color:#f7931a;color:white;font-weight:bold;"
+        "border:none;border-radius:8px;padding:6px 14px;}"
+        "QPushButton:hover{background-color:#ffa733;}"
+    )
+    return b
+
+
+def v_accent_blue(parent):
+    b = QPushButton("  Create your will", parent)
+    b.setIcon(_icon())
+    b.setIconSize(QSize(28, 28))
+    b.setMinimumHeight(40)
+    b.setStyleSheet(
+        "QPushButton{background-color:#2bc8ed;color:white;font-weight:bold;"
+        "border:none;border-radius:8px;padding:6px 14px;}"
+        "QPushButton:hover{background-color:#4fd6f3;}"
+    )
+    return b
+
+
+def main():
+    app = QApplication.instance() or QApplication([])
+    variants = [
+        (v_current, "0-CURRENT", "preview_wizardbtn_0_current.png"),
+        (v_bigger, "A-BIGGER", "preview_wizardbtn_A_bigger.png"),
+        (v_icon_text, "B-ICON+TEXT", "preview_wizardbtn_B_icontext.png"),
+        (v_accent_orange, "C-ORANGE", "preview_wizardbtn_C_orange.png"),
+        (v_accent_blue, "D-BLUE", "preview_wizardbtn_D_blue.png"),
+    ]
+    for make, label, name in variants:
+        panel = _frame(make, label)
+        panel.show()
+        app.processEvents()
+        panel.grab().save(name)
+        print("wrote", name)
+
+
+if __name__ == "__main__":
+    main()