style: apply rustfmt across all crates and demos

Consistent formatting pass: line wrapping, import sorting, trailing
whitespace removal, let-chain indentation, merged derive attributes,
and unsafe block reformatting.

Co-Authored-By: Claude Opus 4.6 (1M context) <[email protected]>

crates/specialized/rtx-neuro-inverse/src/dipole.rs

@@ -621,7 +621,9 @@ impl DipoleFitter {
 
         for iter in 0..self.config.max_iter {
             // Compute gain at current position
-            let gain = if let Ok(g) = self.compute_gain_at_position(&pos) { self.whiten_gain(&g) } else {
+            let gain = if let Ok(g) = self.compute_gain_at_position(&pos) {
+                self.whiten_gain(&g)
+            } else {
                 // Position outside head, move back toward center
                 let alpha = 0.5;
                 pos = [
@@ -666,7 +668,9 @@ impl DipoleFitter {
             // Damped normal equations: (J^T J + λI) Δp = J^T r
             let jtj_damped = &jtj + DMatrix::identity(3, 3) * lambda;
 
-            let delta_pos = if let Some(inv) = jtj_damped.try_inverse() { inv * &jtr } else {
+            let delta_pos = if let Some(inv) = jtj_damped.try_inverse() {
+                inv * &jtr
+            } else {
                 lambda *= 10.0;
                 continue;
             };