The S-Meter section can now be detached into a floating window and
re-docked exactly like all other applets — using the same
FloatingAppletWindow infrastructure, AppSettings geometry persistence,
and PR aethersdr#916 / aethersdr#985 bug fixes (drift, WM centering, shutdown race).

## What changed

### src/gui/AppletPanel.h
- Added `QWidget* m_sMeterContent` — the floatable content container
  (SMeterWidget + TX/RX select row + Peak Hold row), analogous to
  the applet widget held at layout index 1 in every other wrapper.
- Added private `floatSMeter()` and `dockSMeter()` methods.

### src/gui/AppletPanel.cpp

**S-Meter construction:**
- `AppletTitleBar("S-Meter", "VU", this)` — passes the panel pointer
  so the right-click context menu ("⬈ Pop out" / "↩ Dock") is active.
- Introduced `m_sMeterContent` QWidget with its own QVBoxLayout as
  layout index 1 of `m_sMeterSection` (after the title bar), so the
  extractor logic in `floatSMeter()` / `dockSMeter()` is identical to
  every other applet.

**ANLG toggle button:**
- Updated to the float-aware pattern used by TUN / AMP / AG:
  raises/hides the floating window when VU is floating, re-floats
  via `QTimer::singleShot(0)` when IsFloating is persisted but no
  window is open yet (toggle-off → toggle-on cycle fix from aethersdr#985).

**`isAppletFloating()`:**
- Added early return for `"VU"`: checks `m_floatingWindows.contains("VU")`
  directly (VU is not in `m_appletOrder`).

**`floatApplet()` / `dockApplet()`:**
- Added `if (id == "VU")` dispatch at the top of each, delegating to
  `floatSMeter()` / `dockSMeter()`.

**`floatSMeter()` / `dockSMeter()`:**
- Mirror `floatApplet()` / `dockApplet()` exactly: reparent content
  out of/back into `m_sMeterSection`, create/destroy
  `FloatingAppletWindow`, persist `FloatingApplet_VU_IsFloating`,
  save geometry on dock.

**Startup restore:**
- After the existing `m_appletOrder` restore loop, added a
  `QTimer::singleShot(0)` restore for `"VU"` so the S-Meter reopens
  floating if it was floating when the app last closed.

Closes aethersdr#993

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

…959) (#985)

* Fix floating applets losing float state on toggle off/on (#959)

When a floating applet was toggled off and back on, it reappeared docked
instead of floating. Restarting the app restored the correct float state
because the startup path reads IsFloating from AppSettings — but the
toggle and device-reconnect paths did not.

## Root cause

Two separate gaps in AppletPanel:

1. Toggle button handlers — the makeEntry lambda and the bare
   `connect(btn, toggled, wrapper, &QWidget::setVisible)` connections
   for TUN/AMP/AG only checked m_floatingWindows (which is empty after
   a dock) and never read IsFloating from AppSettings on re-enable.

2. setTunerVisible / setAmpVisible / setAgVisible re-enable paths —
   called when a conditional device (TGXL, amp, Antenna Genius)
   reconnects. Same omission: applet was shown docked regardless of
   persisted float state.

## Fix

All toggle button handlers now check FloatingApplet_<ID>_IsFloating
from AppSettings when checked=true and no floating window exists,
and call floatApplet() via QTimer::singleShot(0) if the flag is set.
This mirrors the startup restore logic exactly.

The bare QWidget::setVisible slot connections for TUN, AMP, and AG
are replaced with full float-aware lambdas matching the makeEntry
pattern, so all 10 applets now have consistent toggle behaviour.

setTunerVisible / setAmpVisible / setAgVisible also apply the same
check on the visible=true path, covering the device-reconnect scenario.

Fixes #959

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

* Potential fix on applet positioning when restoring from panel

* Fix applet restore 'bounce' affecting window position on restore

* Fix applet restore 'bounce' affecting window position on restore

* Fix floating applets losing float state and position across dock/undock cycles (#959)

Three related bugs in the floating applet save/restore cycle are fixed together.

When a floating applet was toggled off and back on, it reappeared docked
instead of floating. Restarting the app correctly restored float state
because the startup path reads IsFloating from AppSettings, but the toggle
and device-reconnect paths did not.

Root cause: two gaps in AppletPanel:

1. Toggle button handlers — the makeEntry lambda and the bare
   `connect(btn, toggled, wrapper, &QWidget::setVisible)` connections
   for TUN/AMP/AG only checked m_floatingWindows (which is empty after
   a dock) and never read IsFloating from AppSettings on re-enable.

2. setTunerVisible / setAmpVisible / setAgVisible re-enable paths —
   called when a conditional device (TGXL, amp, Antenna Genius)
   reconnects. Same omission: applet was shown docked regardless of
   persisted float state.

Fix: all toggle button handlers now check FloatingApplet_<ID>_IsFloating
from AppSettings when checked=true and no floating window exists, and call
floatApplet() via QTimer::singleShot(0) if set. This mirrors the startup
restore logic exactly. The bare QWidget::setVisible connections for TUN,
AMP, and AG are replaced with full float-aware lambdas matching the
makeEntry pattern, so all 10 applets have consistent toggle behaviour.

setTunerVisible / setAmpVisible / setAgVisible also apply the same check
on the visible=true path, covering the device-reconnect scenario. On the
visible=false path they now call hideAndSave() instead of dockApplet(),
preserving IsFloating so the window returns floating on reconnect.

saveGeometry() was saving geometry().x()/y() (client-area origin) and
restoring with move() (which sets the frame origin). The decoration height
was added to Y on every cycle, causing the window to drift downward one
title-bar height per hide/show.

Fix: save pos() for x/y (frame position, what move() sets) and
geometry().size() for w/h (client size, what resize() sets).

On show(), the WM re-centers the window and fires moveEvent. restoreGeometry()
runs at 200ms and moves the window correctly. But the 400ms debounce timer
(started by the WM's moveEvent) was not suppressed, and the WM sends a final
ConfigureNotify for the move() call after the guard was cleared at 500ms —
restarting the debounce timer. On slow WMs or under load, this caused the
centered position to be saved over the correct one.

Three-part fix:

1. showAndRestore() now owns the entire guard lifetime: sets
   m_restoringGeometry = true before show(), clears it at 650ms
   (200ms restore delay + 300ms WM settle + 150ms safety margin).
   Previously the guard was cleared at 500ms, leaving a window where
   a late ConfigureNotify could corrupt the save.

2. restoreGeometry() no longer manages the guard at all — it was
   previously racing with showAndRestore's lifetime and clearing it
   early. moveEvent and resizeEvent check the guard before starting
   the debounce timer, so all WM-generated events during the full
   show+restore+settle window are suppressed.

3. dockApplet() now calls hideAndSave() instead of saveGeometry()+hide().
   This stops the debounce timer before hiding, preventing a pending
   timer callback from calling saveGeometry() on an already-hidden
   window where pos() is not valid.

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

* Fix floating applets losing float state and position across dock/undock cycles (#959)

Three related bugs in the floating applet save/restore cycle are fixed together.

When a floating applet was toggled off and back on, it reappeared docked
instead of floating. Restarting the app correctly restored float state
because the startup path reads IsFloating from AppSettings, but the toggle
and device-reconnect paths did not.

Root cause: two gaps in AppletPanel:

1. Toggle button handlers — the makeEntry lambda and the bare
   `connect(btn, toggled, wrapper, &QWidget::setVisible)` connections
   for TUN/AMP/AG only checked m_floatingWindows (which is empty after
   a dock) and never read IsFloating from AppSettings on re-enable.

2. setTunerVisible / setAmpVisible / setAgVisible re-enable paths —
   called when a conditional device (TGXL, amp, Antenna Genius)
   reconnects. Same omission: applet was shown docked regardless of
   persisted float state.

Fix: all toggle button handlers now check FloatingApplet_<ID>_IsFloating
from AppSettings when checked=true and no floating window exists, and call
floatApplet() via QTimer::singleShot(0) if set. This mirrors the startup
restore logic exactly. The bare QWidget::setVisible connections for TUN,
AMP, and AG are replaced with full float-aware lambdas matching the
makeEntry pattern, so all 10 applets have consistent toggle behaviour.

setTunerVisible / setAmpVisible / setAgVisible also apply the same check
on the visible=true path, covering the device-reconnect scenario. On the
visible=false path they now call hideAndSave() instead of dockApplet(),
preserving IsFloating so the window returns floating on reconnect.

saveGeometry() was saving geometry().x()/y() (client-area origin) and
restoring with move() (which sets the frame origin). The decoration height
was added to Y on every cycle, causing the window to drift downward one
title-bar height per hide/show.

Fix: save pos() for x/y (frame position, what move() sets) and
geometry().size() for w/h (client size, what resize() sets).

On show(), the WM re-centers the window and fires moveEvent. restoreGeometry()
runs at 200ms and moves the window correctly. But the 400ms debounce timer
(started by the WM's moveEvent) was not suppressed, and the WM sends a final
ConfigureNotify for the move() call after the guard was cleared at 500ms —
restarting the debounce timer. On slow WMs or under load, this caused the
centered position to be saved over the correct one.

Three-part fix:

1. showAndRestore() now owns the entire guard lifetime: sets
   m_restoringGeometry = true before show(), clears it at 650ms
   (200ms restore delay + 300ms WM settle + 150ms safety margin).
   Previously the guard was cleared at 500ms, leaving a window where
   a late ConfigureNotify could corrupt the save.

2. restoreGeometry() no longer manages the guard at all — it was
   previously racing with showAndRestore's lifetime and clearing it
   early. moveEvent and resizeEvent check the guard before starting
   the debounce timer, so all WM-generated events during the full
   show+restore+settle window are suppressed.

3. dockApplet() now calls hideAndSave() instead of saveGeometry()+hide().
   This stops the debounce timer before hiding, preventing a pending
   timer callback from calling saveGeometry() on an already-hidden
   window where pos() is not valid.

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

* Fix floating applets losing float state and position across dock/undock cycles (#959)

Three related bugs in the floating applet save/restore cycle are fixed together.

When a floating applet was toggled off and back on, it reappeared docked
instead of floating. Restarting the app correctly restored float state
because the startup path reads IsFloating from AppSettings, but the toggle
and device-reconnect paths did not.

Root cause: two gaps in AppletPanel:

1. Toggle button handlers — the makeEntry lambda and the bare
   `connect(btn, toggled, wrapper, &QWidget::setVisible)` connections
   for TUN/AMP/AG only checked m_floatingWindows (which is empty after
   a dock) and never read IsFloating from AppSettings on re-enable.

2. setTunerVisible / setAmpVisible / setAgVisible re-enable paths —
   called when a conditional device (TGXL, amp, Antenna Genius)
   reconnects. Same omission: applet was shown docked regardless of
   persisted float state.

Fix: all toggle button handlers now check FloatingApplet_<ID>_IsFloating
from AppSettings when checked=true and no floating window exists, and call
floatApplet() via QTimer::singleShot(0) if set. This mirrors the startup
restore logic exactly. The bare QWidget::setVisible connections for TUN,
AMP, and AG are replaced with full float-aware lambdas matching the
makeEntry pattern, so all 10 applets have consistent toggle behaviour.

setTunerVisible / setAmpVisible / setAgVisible also apply the same check
on the visible=true path, covering the device-reconnect scenario. On the
visible=false path they now call hideAndSave() instead of dockApplet(),
preserving IsFloating so the window returns floating on reconnect.

saveGeometry() was saving geometry().x()/y() (client-area origin) and
restoring with move() (which sets the frame origin). The decoration height
was added to Y on every cycle, causing the window to drift downward one
title-bar height per hide/show.

Fix: save pos() for x/y (frame position, what move() sets) and
geometry().size() for w/h (client size, what resize() sets).

On show(), the WM re-centers the window and fires moveEvent. restoreGeometry()
runs at 200ms and moves the window correctly. But the 400ms debounce timer
(started by the WM's moveEvent) was not suppressed, and the WM sends a final
ConfigureNotify for the move() call after the guard was cleared at 500ms —
restarting the debounce timer. On slow WMs or under load, this caused the
centered position to be saved over the correct one.

Three-part fix:

1. showAndRestore() now owns the entire guard lifetime: sets
   m_restoringGeometry = true before show(), clears it at 650ms
   (200ms restore delay + 300ms WM settle + 150ms safety margin).
   Previously the guard was cleared at 500ms, leaving a window where
   a late ConfigureNotify could corrupt the save.

2. restoreGeometry() no longer manages the guard at all — it was
   previously racing with showAndRestore's lifetime and clearing it
   early. moveEvent and resizeEvent check the guard before starting
   the debounce timer, so all WM-generated events during the full
   show+restore+settle window are suppressed.

3. dockApplet() now calls hideAndSave() instead of saveGeometry()+hide().
   This stops the debounce timer before hiding, preventing a pending
   timer callback from calling saveGeometry() on an already-hidden
   window where pos() is not valid.

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

---------

Co-authored-by: Claude Sonnet 4.6 <noreply@anthropic.com>

The S-Meter section can now be detached into a floating window and
re-docked exactly like all other applets — using the same
FloatingAppletWindow infrastructure, AppSettings geometry persistence,
and PR aethersdr#916 / aethersdr#985 bug fixes (drift, WM centering, shutdown race).

## What changed

### src/gui/AppletPanel.h
- Added `QWidget* m_sMeterContent` — the floatable content container
  (SMeterWidget + TX/RX select row + Peak Hold row), analogous to
  the applet widget held at layout index 1 in every other wrapper.
- Added private `floatSMeter()` and `dockSMeter()` methods.

### src/gui/AppletPanel.cpp

**S-Meter construction:**
- `AppletTitleBar("S-Meter", "VU", this)` — passes the panel pointer
  so the right-click context menu ("⬈ Pop out" / "↩ Dock") is active.
- Introduced `m_sMeterContent` QWidget with its own QVBoxLayout as
  layout index 1 of `m_sMeterSection` (after the title bar), so the
  extractor logic in `floatSMeter()` / `dockSMeter()` is identical to
  every other applet.

**ANLG toggle button:**
- Updated to the float-aware pattern used by TUN / AMP / AG:
  raises/hides the floating window when VU is floating, re-floats
  via `QTimer::singleShot(0)` when IsFloating is persisted but no
  window is open yet (toggle-off → toggle-on cycle fix from aethersdr#985).

**`isAppletFloating()`:**
- Added early return for `"VU"`: checks `m_floatingWindows.contains("VU")`
  directly (VU is not in `m_appletOrder`).

**`floatApplet()` / `dockApplet()`:**
- Added `if (id == "VU")` dispatch at the top of each, delegating to
  `floatSMeter()` / `dockSMeter()`.

**`floatSMeter()` / `dockSMeter()`:**
- Mirror `floatApplet()` / `dockApplet()` exactly: reparent content
  out of/back into `m_sMeterSection`, create/destroy
  `FloatingAppletWindow`, persist `FloatingApplet_VU_IsFloating`,
  save geometry on dock.

**Startup restore:**
- After the existing `m_appletOrder` restore loop, added a
  `QTimer::singleShot(0)` restore for `"VU"` so the S-Meter reopens
  floating if it was floating when the app last closed.

**dockSMeter() — use m_sMeterContent directly (agent review fix)**
The original used a fragile layout-walk to recover m_sMeterContent from
FloatingAppletWindow's internal layout. If any itemAt() returned null,
appletWidget would be null while the code still called win->deleteLater(),
destroying m_sMeterContent and all its children (m_sMeter, m_txSelect,
m_rxSelect, peak-hold widgets) — crash on next signal-level update.

Fix: use the named member directly. Reparent m_sMeterContent into
m_sMeterSection before deleteLater() so Qt's parent-chain destruction
cannot reach it.

**.gitignore — drop Visual Studio artifacts (agent review fix)**
/.vs and /out/install/x64-Debug are Windows VS IDE artifacts; they belong
in ~/.gitignore_global, not the project-wide .gitignore.

Closes aethersdr#993

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

The S-Meter section can now be detached into a floating window and
re-docked exactly like all other applets — using the same
FloatingAppletWindow infrastructure, AppSettings geometry persistence,
and PR aethersdr#916 / aethersdr#985 bug fixes (drift, WM centering, shutdown race).

## What changed

### src/gui/AppletPanel.h
- Added `QWidget* m_sMeterContent` — the floatable content container
  (SMeterWidget + TX/RX select row + Peak Hold row), analogous to
  the applet widget held at layout index 1 in every other wrapper.
- Added private `floatSMeter()` and `dockSMeter()` methods.

### src/gui/AppletPanel.cpp

**S-Meter construction:**
- `AppletTitleBar("S-Meter", "VU", this)` — passes the panel pointer
  so the right-click context menu ("⬈ Pop out" / "↩ Dock") is active.
- Introduced `m_sMeterContent` QWidget with its own QVBoxLayout as
  layout index 1 of `m_sMeterSection` (after the title bar), so the
  extractor logic in `floatSMeter()` / `dockSMeter()` is identical to
  every other applet.

**ANLG toggle button:**
- Updated to the float-aware pattern used by TUN / AMP / AG:
  raises/hides the floating window when VU is floating, re-floats
  via `QTimer::singleShot(0)` when IsFloating is persisted but no
  window is open yet (toggle-off → toggle-on cycle fix from aethersdr#985).

**`isAppletFloating()`:**
- Added early return for `"VU"`: checks `m_floatingWindows.contains("VU")`
  directly (VU is not in `m_appletOrder`).

**`floatApplet()` / `dockApplet()`:**
- Added `if (id == "VU")` dispatch at the top of each, delegating to
  `floatSMeter()` / `dockSMeter()`.

**`floatSMeter()` / `dockSMeter()`:**
- Mirror `floatApplet()` / `dockApplet()` exactly: reparent content
  out of/back into `m_sMeterSection`, create/destroy
  `FloatingAppletWindow`, persist `FloatingApplet_VU_IsFloating`,
  save geometry on dock.

**Startup restore:**
- After the existing `m_appletOrder` restore loop, added a
  `QTimer::singleShot(0)` restore for `"VU"` so the S-Meter reopens
  floating if it was floating when the app last closed.

**dockSMeter() — use m_sMeterContent directly (agent review fix)**
The original used a fragile layout-walk to recover m_sMeterContent from
FloatingAppletWindow's internal layout. If any itemAt() returned null,
appletWidget would be null while the code still called win->deleteLater(),
destroying m_sMeterContent and all its children (m_sMeter, m_txSelect,
m_rxSelect, peak-hold widgets) — crash on next signal-level update.

Fix: use the named member directly. Reparent m_sMeterContent into
m_sMeterSection before deleteLater() so Qt's parent-chain destruction
cannot reach it.

**.gitignore — drop Visual Studio artifacts (agent review fix)**
/.vs and /out/install/x64-Debug are Windows VS IDE artifacts; they belong
in ~/.gitignore_global, not the project-wide .gitignore.

Closes aethersdr#993

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

* Updated for vscode and visual studio ignore patterns for local windows development.

* Add pop-out/pop-in support for the S-Meter (VU) applet (#993)

The S-Meter section can now be detached into a floating window and
re-docked exactly like all other applets — using the same
FloatingAppletWindow infrastructure, AppSettings geometry persistence,
and PR #916 / #985 bug fixes (drift, WM centering, shutdown race).

## What changed

### src/gui/AppletPanel.h
- Added `QWidget* m_sMeterContent` — the floatable content container
  (SMeterWidget + TX/RX select row + Peak Hold row), analogous to
  the applet widget held at layout index 1 in every other wrapper.
- Added private `floatSMeter()` and `dockSMeter()` methods.

### src/gui/AppletPanel.cpp

**S-Meter construction:**
- `AppletTitleBar("S-Meter", "VU", this)` — passes the panel pointer
  so the right-click context menu ("⬈ Pop out" / "↩ Dock") is active.
- Introduced `m_sMeterContent` QWidget with its own QVBoxLayout as
  layout index 1 of `m_sMeterSection` (after the title bar), so the
  extractor logic in `floatSMeter()` / `dockSMeter()` is identical to
  every other applet.

**ANLG toggle button:**
- Updated to the float-aware pattern used by TUN / AMP / AG:
  raises/hides the floating window when VU is floating, re-floats
  via `QTimer::singleShot(0)` when IsFloating is persisted but no
  window is open yet (toggle-off → toggle-on cycle fix from #985).

**`isAppletFloating()`:**
- Added early return for `"VU"`: checks `m_floatingWindows.contains("VU")`
  directly (VU is not in `m_appletOrder`).

**`floatApplet()` / `dockApplet()`:**
- Added `if (id == "VU")` dispatch at the top of each, delegating to
  `floatSMeter()` / `dockSMeter()`.

**`floatSMeter()` / `dockSMeter()`:**
- Mirror `floatApplet()` / `dockApplet()` exactly: reparent content
  out of/back into `m_sMeterSection`, create/destroy
  `FloatingAppletWindow`, persist `FloatingApplet_VU_IsFloating`,
  save geometry on dock.

**Startup restore:**
- After the existing `m_appletOrder` restore loop, added a
  `QTimer::singleShot(0)` restore for `"VU"` so the S-Meter reopens
  floating if it was floating when the app last closed.

Closes #993

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

* Add pop-out/pop-in support for the S-Meter (VU) applet (#993)

The S-Meter section can now be detached into a floating window and
re-docked exactly like all other applets — using the same
FloatingAppletWindow infrastructure, AppSettings geometry persistence,
and PR #916 / #985 bug fixes (drift, WM centering, shutdown race).

## What changed

### src/gui/AppletPanel.h
- Added `QWidget* m_sMeterContent` — the floatable content container
  (SMeterWidget + TX/RX select row + Peak Hold row), analogous to
  the applet widget held at layout index 1 in every other wrapper.
- Added private `floatSMeter()` and `dockSMeter()` methods.

### src/gui/AppletPanel.cpp

**S-Meter construction:**
- `AppletTitleBar("S-Meter", "VU", this)` — passes the panel pointer
  so the right-click context menu ("⬈ Pop out" / "↩ Dock") is active.
- Introduced `m_sMeterContent` QWidget with its own QVBoxLayout as
  layout index 1 of `m_sMeterSection` (after the title bar), so the
  extractor logic in `floatSMeter()` / `dockSMeter()` is identical to
  every other applet.

**ANLG toggle button:**
- Updated to the float-aware pattern used by TUN / AMP / AG:
  raises/hides the floating window when VU is floating, re-floats
  via `QTimer::singleShot(0)` when IsFloating is persisted but no
  window is open yet (toggle-off → toggle-on cycle fix from #985).

**`isAppletFloating()`:**
- Added early return for `"VU"`: checks `m_floatingWindows.contains("VU")`
  directly (VU is not in `m_appletOrder`).

**`floatApplet()` / `dockApplet()`:**
- Added `if (id == "VU")` dispatch at the top of each, delegating to
  `floatSMeter()` / `dockSMeter()`.

**`floatSMeter()` / `dockSMeter()`:**
- Mirror `floatApplet()` / `dockApplet()` exactly: reparent content
  out of/back into `m_sMeterSection`, create/destroy
  `FloatingAppletWindow`, persist `FloatingApplet_VU_IsFloating`,
  save geometry on dock.

**Startup restore:**
- After the existing `m_appletOrder` restore loop, added a
  `QTimer::singleShot(0)` restore for `"VU"` so the S-Meter reopens
  floating if it was floating when the app last closed.

**dockSMeter() — use m_sMeterContent directly (agent review fix)**
The original used a fragile layout-walk to recover m_sMeterContent from
FloatingAppletWindow's internal layout. If any itemAt() returned null,
appletWidget would be null while the code still called win->deleteLater(),
destroying m_sMeterContent and all its children (m_sMeter, m_txSelect,
m_rxSelect, peak-hold widgets) — crash on next signal-level update.

Fix: use the named member directly. Reparent m_sMeterContent into
m_sMeterSection before deleteLater() so Qt's parent-chain destruction
cannot reach it.

**.gitignore — drop Visual Studio artifacts (agent review fix)**
/.vs and /out/install/x64-Debug are Windows VS IDE artifacts; they belong
in ~/.gitignore_global, not the project-wide .gitignore.

Closes #993

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

* Add pop-out/pop-in support for the S-Meter (VU) applet (#993)

The S-Meter section can now be detached into a floating window and
re-docked exactly like all other applets — using the same
FloatingAppletWindow infrastructure, AppSettings geometry persistence,
and PR #916 / #985 bug fixes (drift, WM centering, shutdown race).

## What changed

### src/gui/AppletPanel.h
- Added `QWidget* m_sMeterContent` — the floatable content container
  (SMeterWidget + TX/RX select row + Peak Hold row), analogous to
  the applet widget held at layout index 1 in every other wrapper.
- Added private `floatSMeter()` and `dockSMeter()` methods.

### src/gui/AppletPanel.cpp

**S-Meter construction:**
- `AppletTitleBar("S-Meter", "VU", this)` — passes the panel pointer
  so the right-click context menu ("⬈ Pop out" / "↩ Dock") is active.
- Introduced `m_sMeterContent` QWidget with its own QVBoxLayout as
  layout index 1 of `m_sMeterSection` (after the title bar), so the
  extractor logic in `floatSMeter()` / `dockSMeter()` is identical to
  every other applet.

**ANLG toggle button:**
- Updated to the float-aware pattern used by TUN / AMP / AG:
  raises/hides the floating window when VU is floating, re-floats
  via `QTimer::singleShot(0)` when IsFloating is persisted but no
  window is open yet (toggle-off → toggle-on cycle fix from #985).

**`isAppletFloating()`:**
- Added early return for `"VU"`: checks `m_floatingWindows.contains("VU")`
  directly (VU is not in `m_appletOrder`).

**`floatApplet()` / `dockApplet()`:**
- Added `if (id == "VU")` dispatch at the top of each, delegating to
  `floatSMeter()` / `dockSMeter()`.

**`floatSMeter()` / `dockSMeter()`:**
- Mirror `floatApplet()` / `dockApplet()` exactly: reparent content
  out of/back into `m_sMeterSection`, create/destroy
  `FloatingAppletWindow`, persist `FloatingApplet_VU_IsFloating`,
  save geometry on dock.

**Startup restore:**
- After the existing `m_appletOrder` restore loop, added a
  `QTimer::singleShot(0)` restore for `"VU"` so the S-Meter reopens
  floating if it was floating when the app last closed.

**dockSMeter() — use m_sMeterContent directly (agent review fix)**
The original used a fragile layout-walk to recover m_sMeterContent from
FloatingAppletWindow's internal layout. If any itemAt() returned null,
appletWidget would be null while the code still called win->deleteLater(),
destroying m_sMeterContent and all its children (m_sMeter, m_txSelect,
m_rxSelect, peak-hold widgets) — crash on next signal-level update.

Fix: use the named member directly. Reparent m_sMeterContent into
m_sMeterSection before deleteLater() so Qt's parent-chain destruction
cannot reach it.

**.gitignore — drop Visual Studio artifacts (agent review fix)**
/.vs and /out/install/x64-Debug are Windows VS IDE artifacts; they belong
in ~/.gitignore_global, not the project-wide .gitignore.

Closes #993

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

---------

Co-authored-by: Claude Sonnet 4.6 <noreply@anthropic.com>

…ettings key (#3358) (#3409)

## Problem

\`ButtonBar/Layout\`, \`ButtonBar/DrawerOpen\`, and
\`ButtonBar/Favorites\` all contain a \`/\`. \`AppSettings::save()\`
silently drops any key not matching \`^[A-Za-z_][A-Za-z0-9_]*$\` — the
validator was tightened in #985 to prevent invalid XML element names.
The customisable button bar shipped in #3150 *after* that tightening, so
its layout, drawer state, and favourites have **never round-tripped to
disk for any user**.

## Fix

Rename the three keys to \`ButtonBarLayout\`, \`ButtonBarDrawerOpen\`,
\`ButtonBarFavorites\`. No migration needed — nothing was ever written
to the old slash-containing keys, so there is no on-disk state to
convert.

## Testing

Verified locally on macOS (Apple Silicon, dev build off \`main\`):
- Before fix: \`ButtonBar/Layout\` and \`ButtonBar/DrawerOpen\` absent
from \`AetherSDR.settings\` after every save (silently discarded)
- After fix: \`ButtonBarLayout\` and \`ButtonBarDrawerOpen\` present in
\`AetherSDR.settings\` with correct JSON values
- Button bar order and drawer state survive app restart

Fixes #3358

…ettings key (aethersdr#3358) (aethersdr#3409)

## Problem

\`ButtonBar/Layout\`, \`ButtonBar/DrawerOpen\`, and
\`ButtonBar/Favorites\` all contain a \`/\`. \`AppSettings::save()\`
silently drops any key not matching \`^[A-Za-z_][A-Za-z0-9_]*$\` — the
validator was tightened in aethersdr#985 to prevent invalid XML element names.
The customisable button bar shipped in aethersdr#3150 *after* that tightening, so
its layout, drawer state, and favourites have **never round-tripped to
disk for any user**.

## Fix

Rename the three keys to \`ButtonBarLayout\`, \`ButtonBarDrawerOpen\`,
\`ButtonBarFavorites\`. No migration needed — nothing was ever written
to the old slash-containing keys, so there is no on-disk state to
convert.

## Testing

Verified locally on macOS (Apple Silicon, dev build off \`main\`):
- Before fix: \`ButtonBar/Layout\` and \`ButtonBar/DrawerOpen\` absent
from \`AetherSDR.settings\` after every save (silently discarded)
- After fix: \`ButtonBarLayout\` and \`ButtonBarDrawerOpen\` present in
\`AetherSDR.settings\` with correct JSON values
- Button bar order and drawer state survive app restart

Fixes aethersdr#3358