Reword code comments in plain technical language

Comments only, no code changes. Replaces vague or personified phrasing
with explicit statements of what the code does and why, uses bullet
lists for multi-case behavior, and fixes the settings path in
WindowSettings.h (~/.config/sloposk/sloposk.conf).

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>

src/window/CollapseController.cpp

@@ -37,7 +37,7 @@ bool CollapseController::collapse()
     m_expandedSize = m_window.size();
     m_collapsed = true;
     Q_EMIT collapsedChanged();
-    // After the next frame, once the compositor knows the lower minimum size.
+    // Wait one frame, so the compositor has the new (lower) minimum size before the resize.
     connect(&m_window, &QQuickWindow::frameSwapped, this, [this] {
         if (m_collapsed)
             m_placement.moveResize(m_keyRect, false);
@@ -50,10 +50,10 @@ void CollapseController::expand()
     if (!m_collapsed || m_expanding.isActive())
         return;
     if (roughlyEqual(m_window.size(), m_expandedSize)) {
-        finishExpanding(); // never shrank: nothing to move
+        finishExpanding(); // window never shrank: nothing to resize
         return;
     }
-    // Stays collapsed until the window has grown, so the keys don't flash squeezed.
+    // Stay collapsed until the window has grown, so the keys aren't drawn squeezed.
     m_placement.moveResize(QRectF(-m_keyRect.topLeft(), m_expandedSize), true);
     m_expanding.start();
 }
@@ -68,7 +68,7 @@ void CollapseController::finishExpanding()
 {
     m_expanding.stop();
     if (!roughlyEqual(m_window.size(), m_expandedSize))
-        m_window.resize(m_expandedSize); // no KWin to do it
+        m_window.resize(m_expandedSize); // KWin didn't resize (timeout): resize directly
     m_collapsed = false;
     Q_EMIT collapsedChanged();
 }