Harden desktop recovery and pre-release stability checks

Bound IPC transport deadlines while preserving portal leases, supervise desktop helper and agent recovery, and reserve final floating window geometry during placement.

Stabilize CLI output and isolated tests, expand workspace CI, resolve formatting and lint failures, and bundle the MIT license with installer compatibility.

crates/ferese-animation/src/gesture.rs

@@ -62,16 +62,17 @@ impl VelocityTracker {
                 let dt = last.saturating_sub(first).as_secs_f64();
                 return if dt > 0.0 { (origin - position) / dt } else { 0.0 };
             }
-            for entry in col..=degree + 1 {
-                matrix[col][entry] /= divisor;
+            for entry in &mut matrix[col][col..=degree + 1] {
+                *entry /= divisor;
             }
-            for row in 0..=degree {
+            let pivot_row = matrix[col];
+            for (row, values) in matrix.iter_mut().enumerate().take(degree + 1) {
                 if row == col {
                     continue;
                 }
-                let factor = matrix[row][col];
-                for entry in col..=degree + 1 {
-                    matrix[row][entry] -= factor * matrix[col][entry];
+                let factor = values[col];
+                for (entry, pivot) in values[col..=degree + 1].iter_mut().zip(&pivot_row[col..=degree + 1]) {
+                    *entry -= factor * pivot;
                 }
             }
         }

crates/ferese-ipc/src/events.rs

@@ -32,7 +32,7 @@ pub struct Snapshot {
 #[derive(Clone, Debug, Deserialize, Serialize, PartialEq)]
 #[serde(tag = "type", rename_all = "snake_case")]
 pub enum Change {
-    Snapshot { desktop: Snapshot },
+    Snapshot { desktop: Box<Snapshot> },
     OutputsChanged { outputs: Value },
     WorkspacesChanged { workspaces: Value },
     WindowsChanged { windows: Value },