chore: pre-release cleanup — remove debug logs, fix clippy warning, add missing ja translations, and format code

- Remove 2 console.log statements from DeepLinkImportDialog
- Fix clippy unnecessary_map_or: use is_some_and in live.rs
- Add 17 missing Japanese i18n keys (skills, proxy, circuitBreaker, universalProvider)
- Run prettier and cargo fmt to fix pre-existing formatting drift

src-tauri/src/session_manager/providers/utils.rs

@@ -27,11 +27,7 @@ pub fn read_head_tail_lines(
 
     // Read head lines from the beginning
     let reader = BufReader::new(file);
-    let head: Vec<String> = reader
-        .lines()
-        .take(head_n)
-        .map_while(Result::ok)
-        .collect();
+    let head: Vec<String> = reader.lines().take(head_n).map_while(Result::ok).collect();
 
     // Seek to last ~16 KB for tail lines
     let seek_pos = file_len.saturating_sub(16_384);