remove wrapup video rendering (ffmpeg)

SPA handles wrapup visuals client-side; server-side
renderer was dead code pulling in ffmpeg + image crates.

crates/application/src/config.rs

@@ -11,8 +11,6 @@ pub struct WrapUpConfig {
     pub font_path: Option<String>,
     pub logo_path: Option<String>,
     pub bg_dir: Option<String>,
-    pub ffmpeg_path: String,
-    pub max_concurrent_renders: usize,
 }
 
 impl AppConfig {
@@ -41,11 +39,6 @@ impl WrapUpConfig {
             font_path: std::env::var("WRAPUP_FONT_PATH").ok(),
             logo_path: std::env::var("WRAPUP_LOGO_PATH").ok(),
             bg_dir: std::env::var("WRAPUP_BG_DIR").ok(),
-            ffmpeg_path: std::env::var("FFMPEG_PATH").unwrap_or_else(|_| "ffmpeg".to_string()),
-            max_concurrent_renders: std::env::var("WRAPUP_MAX_CONCURRENT")
-                .ok()
-                .and_then(|v| v.parse().ok())
-                .unwrap_or(2),
         }
     }
 }