Make tiling's master/stack ratio live, add settings readback everywhere

Investigated the "tiling needs a lot of work" report directly. The
MasterStackLayout algorithm itself was already correct; the real gap was
that dragging or resizing a tiled window did nothing durable (raw
geometry that the next arrange_workspace silently discarded), and
master_ratio/master_count had no live path at all (config-file only).

A resize-drag on the shared master/stack boundary now live-adjusts
TilingConfig::master_ratio and re-arranges the group immediately; srd set
master_ratio/master_count do the same for a keybind or script. Found and
fixed a real bug while building this: start_resize's own focus_window
call re-stacks its target in self.order before the ratio-drag decision
used to be made, silently misclassifying real master-column grabs.
Fixed by deciding ratio-drag status (and freezing the membership
snapshot it depends on) before that raise happens, applying
MasterStackLayout directly against the frozen snapshot rather than
re-deriving membership from the by-then-reordered live order. Live-
verified in a nested compositor, not just unit-tested.

Also closes the readback gaps flagged directly by the AGS peer session:
border_width/border_color/corner_radius/decoration_mode/gap_inner/
gap_outer/master_ratio/master_count were all live-settable via srd set
with no way to read the current value back, and pin_input had no
readback at all. SettingsResponse now reports all of them; a new
pinned_inputs query (srd pinned inputs) lists every currently pinned
pid/window.

1 files changed, 14 insertions, 0 deletions

diff --git a/crates/core/src/window.rs b/crates/core/src/window.rs
index ae82b49..a8de352 100644
--- a/crates/core/src/window.rs
+++ b/crates/core/src/window.rs
@@ -705,6 +705,20 @@ impl ResizeEdge {
         r
     }
 
+    /// Whether this edge has a left-hand component (`Left`, `TopLeft`,
+    /// `BottomLeft`) - used by tiling's own master/stack ratio-drag
+    /// detection (`WindowManager::tiling_ratio_drag`) to recognize a stack
+    /// column window's left edge as the same shared boundary a master
+    /// column window's own right edge is.
+    pub fn has_left(self) -> bool {
+        matches!(self, ResizeEdge::Left | ResizeEdge::TopLeft | ResizeEdge::BottomLeft)
+    }
+
+    /// [`Self::has_left`]'s mirror, for `Right`/`TopRight`/`BottomRight`.
+    pub fn has_right(self) -> bool {
+        matches!(self, ResizeEdge::Right | ResizeEdge::TopRight | ResizeEdge::BottomRight)
+    }
+
     /// Re-derives one dimension of `delta_applied` (the result of
     /// `apply_delta`, already reflecting this drag's pointer motion) so
     /// the rect holds `ratio` (`width, height`) - `Window::aspect_ratio`'s