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]>

demos/slidescope-shared/src/ipc.rs

@@ -6,8 +6,7 @@ use crate::jobs::JobStatus;
 use crate::slide::SlideStatus;
 
 /// Service status response
-#[derive(Debug, Clone, Serialize, Deserialize)]
-#[derive(Default)]
+#[derive(Debug, Clone, Serialize, Deserialize, Default)]
 pub struct SlidescopeStatus {
     /// Whether the service is initialized
     pub initialized: bool,
@@ -27,7 +26,6 @@ pub struct SlidescopeStatus {
     pub uptime_secs: u64,
 }
 
-
 /// Filter options for listing slides
 #[derive(Debug, Clone, Default, Serialize, Deserialize)]
 pub struct SlideFilter {
@@ -93,7 +91,6 @@ pub enum ExportFormat {
     Json,
 }
 
-
 /// Export request for results
 #[derive(Debug, Clone, Serialize, Deserialize)]
 pub struct ExportRequest {