feat: implement multi-provider support in media library

- Introduced IProviderRegistry to manage multiple media providers.
- Updated AppState to use provider_registry instead of a single media_provider.
- Refactored library routes to support provider-specific queries for collections, series, genres, and items.
- Enhanced ProgrammingBlock to include provider_id for algorithmic and manual content types.
- Modified frontend components to allow selection of providers and updated API calls to include provider parameters.
- Adjusted hooks and types to accommodate provider-specific functionality.

k-tv-backend/infra/src/local_files/scanner.rs

@@ -115,9 +115,7 @@ fn extract_year(s: &str) -> Option<u16> {
         if !chars[i..i + 4].iter().all(|c| c.is_ascii_digit()) {
             continue;
         }
-        // Must start with 19 or 20.
-        let prefix = chars[i] as u8 * 10 + chars[i + 1] as u8 - b'0' * 11;
-        // Simpler: just parse and range-check.
+        // Parse and range-check.
         let s4: String = chars[i..i + 4].iter().collect();
         let num: u16 = s4.parse().ok()?;
         if !(1900..=2099).contains(&num) {
@@ -126,7 +124,6 @@ fn extract_year(s: &str) -> Option<u16> {
         // Word-boundary: char before and after must not be digits.
         let before_ok = i == 0 || !chars[i - 1].is_ascii_digit();
         let after_ok = i + 4 >= n || !chars[i + 4].is_ascii_digit();
-        let _ = prefix;
         if before_ok && after_ok {
             return Some(num);
         }