Core window manager: real fixes plus three new rule/placement primitives

Several independent, real pieces landed in crates/core this shift - see
docs/TODO.md for each one's full root-cause/verification narrative:

- "Primary" monitor is now picked by which head sits at physical (0, 0)
  (the user's own configured anchor), not whichever connector DRM
  happened to probe first - fixes desktop icons and new-window placement
  landing on the wrong monitor depending on hotplug/probe order.
- A new window's target monitor now prioritizes the pointer's own current
  monitor over the last-focused window's monitor, which goes stale the
  moment the user's attention moves to empty desktop, a panel, or a dock.
- aspect_ratio window-rule action ("W:H") plus ResizeEdge::apply_aspect_
  ratio: holds a floating window's aspect ratio through an interactive
  resize. The real, scoped "phone monitor" primitive - matches any VM/
  emulator/scrcpy window by app_id, nothing Android- or VM-specific here.
- general.phone_mode (WindowManager::phone_mode): a new window defaults
  to maximized instead of floating/tiled small, unless a rule explicitly
  floats it or sets maximized - the one placement default a phone-shaped
  screen actually needs. Exposed read-only via IPC so a shell panel can
  adapt its own chrome to the same signal.
- input_pin.rs: the core half of pinning a virtual pointer to a specific
  window (Multi-cursor Phase 2) - a backend-agnostic request queue,
  same cross-boundary shape output_position_requests/lock_requested
  already use, since core has no real Wayland protocol object to reach
  into itself.

Full workspace test suite covers all of the above (aspect-ratio resize
math for every edge case, phone-mode default-vs-rule-override behavior,
the pin-input request queue, the monitor-picking fixes).

1 files changed, 6 insertions, 0 deletions

diff --git a/crates/core/src/rules.rs b/crates/core/src/rules.rs
index ec096be..ea83501 100644
--- a/crates/core/src/rules.rs
+++ b/crates/core/src/rules.rs
@@ -94,6 +94,12 @@ pub struct WindowRuleActions {
     /// Per-window resize-grab-margin override, in logical pixels
     /// (Hyprland's per-window `extend_border_grab_area`).
     pub resize_margin: Option<i32>,
+    /// `(width, height)` ratio to hold while resizing - see `Window::
+    /// aspect_ratio`'s own doc comment for the "phone monitor" use case
+    /// this exists for. Parsed from a `"9:16"`-shaped string by the Lua
+    /// binding (`crates/config`), not here - this crate has no config
+    /// engine of its own to own that parsing.
+    pub aspect_ratio: Option<(u32, u32)>,
 }
 
 #[derive(Debug, Clone, Default)]