style: apply current rustfmt to the tree

A newer rustfmt wraps over-long match arms and call expressions that the
version main was last formatted with left on one line. Pure formatting,
no semantic change — split out so the friends-list feature commits stay
focused on real changes.

Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>

src/host/quality.rs

@@ -27,10 +27,26 @@ impl Quality {
     /// values and resolves to one of the others at runtime (see [`resolve_auto`]).
     fn preset(self) -> Option<Preset> {
         let p = match self {
-            Quality::Source => Preset { max_height: None, bitrate: 6000, framerate: 30 },
-            Quality::High => Preset { max_height: Some(1080), bitrate: 4000, framerate: 30 },
-            Quality::Medium => Preset { max_height: Some(720), bitrate: 2500, framerate: 30 },
-            Quality::Low => Preset { max_height: Some(480), bitrate: 1000, framerate: 30 },
+            Quality::Source => Preset {
+                max_height: None,
+                bitrate: 6000,
+                framerate: 30,
+            },
+            Quality::High => Preset {
+                max_height: Some(1080),
+                bitrate: 4000,
+                framerate: 30,
+            },
+            Quality::Medium => Preset {
+                max_height: Some(720),
+                bitrate: 2500,
+                framerate: 30,
+            },
+            Quality::Low => Preset {
+                max_height: Some(480),
+                bitrate: 1000,
+                framerate: 30,
+            },
             Quality::Auto => return None,
         };
         Some(p)
@@ -49,7 +65,12 @@ impl Quality {
 
 /// Fixed presets in descending quality order — Auto walks this to find the
 /// best one whose per-viewer bitrate fits the measured upstream budget.
-const AUTO_LADDER: [Quality; 4] = [Quality::Source, Quality::High, Quality::Medium, Quality::Low];
+const AUTO_LADDER: [Quality; 4] = [
+    Quality::Source,
+    Quality::High,
+    Quality::Medium,
+    Quality::Low,
+];
 
 /// Auto's fallback when there is no usable bandwidth measurement.
 const AUTO_FALLBACK: Quality = Quality::Medium;
@@ -146,7 +167,9 @@ fn resolve_auto(safe_mbps: Option<f64>, sizing_viewers: u32) -> (Preset, String,
             (
                 preset,
                 format!("Auto → {}", chosen.name()),
-                format!("auto: {safe_mbps:.1} Mbps safe ÷ {n} viewer(s) = {budget_mbps:.1} Mbps each"),
+                format!(
+                    "auto: {safe_mbps:.1} Mbps safe ÷ {n} viewer(s) = {budget_mbps:.1} Mbps each"
+                ),
             )
         }
         None => {
@@ -154,7 +177,8 @@ fn resolve_auto(safe_mbps: Option<f64>, sizing_viewers: u32) -> (Preset, String,
             (
                 preset,
                 format!("Auto → {}", AUTO_FALLBACK.name()),
-                "auto fallback — no bandwidth measurement (run `pixelpass --reconfigure`)".to_string(),
+                "auto fallback — no bandwidth measurement (run `pixelpass --reconfigure`)"
+                    .to_string(),
             )
         }
     }