fix(run): Shorten java command lines too long for the OS (#28) (#45)

Root cause: every java launch inlined the whole classpath into one -cp argument with no "Shorten command line", so long classpaths exceeded CreateProcessW's 32767-char limit (os error 206) before the JVM started.
Fix (IDEA's auto "Shorten command line"): ide-run rewrites a too-long java command line at spawn time — @argfile on JDK 9+ with ASCII paths, otherwise a MANIFEST pathing jar (percent-encoded file: URLs, 72-byte lines); temp files are removed when the process exits. Debug passes the same choice to java-debug's shortenCommandLine.
Siblings covered: Application/Spring Boot, test classpath, Kotlin main, explicit java -cp configs, profiler, PTY launches, Debug.
Verified: unit tests, pathing jar loaded by real JDK 8/11/25, ProcessManager integration test with 3000 entries on JDK 8/17/25. Not verified on Windows.

Claude-Session: https://claude.ai/code/session_01VUYsdXA2nkF5v6zsC93dpn

src-tauri/src/commands/java.rs

@@ -51,6 +51,9 @@ pub async fn java_resolve_launch(
         ide_sdk::java::pick_jdk(&jdks, release).map(|j| ide_sdk::java::java_executable(&j.home))
     });
     info.java_exec = Some(java.map(|p| p.to_string_lossy().into_owned()).unwrap_or_else(|| "java".to_owned()));
+    let exec = PathBuf::from(info.java_exec.as_deref().unwrap_or("java"));
+    let shorten = ide_run::java_cmdline::shortening_for(&exec, &info.class_paths, &info.module_paths, cfg!(windows));
+    info.shorten_command_line = Some(shorten.as_str().to_owned());
     if info.error_count > 0 {
         let vm_args = &settings.languages.java.jdtls_vm_args;
         let lombok = ide_sdk::lombok::lombok_agent(