Refator: filament tab pages organisation

[Robert0Mart]

Stacked PR — merge order

This PR is stacked on top of:

1. refactor main window stacked widget #298
2. refactor: separated control stacked widget into pages #299

Do not merge until #298 and #299 are merged first.

CI won't run here until the base becomes dev (after the parents merge).

Description

• Refactor

BlocksScreen/lib/panels/filamentTab.py

• aligned main button to the rest of the tabs
• updated import

BlocksScreen/lib/panels/widgets/FilamentTab/addFilamentPage.py
BlocksScreen/lib/panels/widgets/FilamentTab/addSpoolPage.py
BlocksScreen/lib/panels/widgets/FilamentTab/amuPage.py
BlocksScreen/lib/panels/widgets/FilamentTab/amuWidgets.py
BlocksScreen/lib/panels/widgets/FilamentTab/basicFilamentPanel.py
BlocksScreen/lib/panels/widgets/FilamentTab/spoolmanPage.py

• moved pages to their own folder for better organisation

BlocksScreen/lib/ui/filamentSensorsPage.ui
BlocksScreen/lib/ui/filamentSensorsPage_ui.py
BlocksScreen/lib/ui/filamentStackedWidget.ui
BlocksScreen/lib/ui/filamentStackedWidget_ui.py

• deleted unused ui files

[gmmcosta15]

What's good

• Pure moves (100%/99% similarity), and the imports plus test_basic_filament_panel.py are updated in the same PR, so nothing is left pointing at the old paths
• Drops ~2.5k lines of dead generated UI (filamentStackedWidget*, filamentSensorsPage* had no importers)
• Replaces the 87.5 "dont ask how i got this value" row hack with explicit 80 px rows and a fixed-height content widget, so the Filament and Control grids now have the same geometry
• self.ui is gone with no leftover references
• Header now matches ControlTab from #299 (same font weight, side blanks)
• _setupUi -> _setup_ui with docstrings, which helps docstrcov

1. filamentTab.py:884-983: the page is built as a local widget and only named at the end; resize does nothing
L888 widget = QtWidgets.QWidget() becomes self.filament_control_page only at L982. L886 self.resize(710, 410) does nothing on a stacked widget inside a layout.

self.filament_control_page = QtWidgets.QWidget()
self.filament_control_page.setFixedSize(710, 410)
self.verticalLayout = QtWidgets.QVBoxLayout(self.filament_control_page)
...
self.addWidget(self.filament_control_page)
# delete self.resize(710, 410)

2. filamentTab.py:979: grid height repeats the magic 80, and #299 sizes the same grid a different way
80 * 3 + spacing() * 2 repeats setRowMinimumHeight(..., 80). controlTab.py (#299) uses sizeHint().height() for the same 3-row grid. Share one helper:

# lib/utils/menu_grid.py
MENU_ROW_H = 80

def fixed_menu_grid(parent: QtWidgets.QWidget, grid: QtWidgets.QGridLayout, rows: int = 3) -> QtWidgets.QWidget:
    """Wrap a menu grid in a fixed-height widget so rows never shift."""
    for r in range(rows):
        grid.setRowMinimumHeight(r, MENU_ROW_H)
    grid.setContentsMargins(0, 0, 0, 0)
    w = QtWidgets.QWidget(parent)
    w.setLayout(grid)
    w.setFixedHeight(MENU_ROW_H * rows + grid.verticalSpacing() * (rows - 1))
    return w

3. filamentTab.py:897/919: two identical 60x55 blanks, while ControlTab's Hblank is 60x60
They're never toggled, so a spacer is enough. Or use a factory with the same size as ControlTab:

def _hblank() -> QtWidgets.QWidget:
    w = QtWidgets.QWidget()
    w.setFixedSize(60, 60)
    return w

self.fp_header_layout.addWidget(_hblank())

4. widgets/FilamentTab/ has no __init__.py, but lib/panels/widgets/ does
That makes it an implicit namespace package inside a regular package (same for ControlTab/ in #299).

touch BlocksScreen/lib/panels/widgets/FilamentTab/__init__.py

5. FilamentTab/basicFilamentPanel.py:351-352: leftovers in the method this PR renamed
setObjectName("self") and a resize(710, 411) that does nothing.

self.setObjectName("basic_filament_panel")
# delete self.resize(710, 411)