fix: guard interactive selector against execution flags, cap semaphore

- Only show the interactive task selector when no execution flags
  (--concurrency-limit, --parallel) are present
- Cap semaphore permits to Semaphore::MAX_PERMITS to avoid panic
  when concurrency_limit is usize::MAX (from --parallel)

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

Author: branchseer

crates/vite_task/src/session/execute/mod.rs

@@ -88,7 +88,8 @@ impl ExecutionContext<'_> {
             return;
         }
 
-        let semaphore = Arc::new(Semaphore::new(graph.concurrency_limit));
+        let semaphore =
+            Arc::new(Semaphore::new(graph.concurrency_limit.min(Semaphore::MAX_PERMITS)));
 
         // Compute dependency count for each node.
         // Edge A→B means "A depends on B", so A's dependency count = outgoing edge count.

crates/vite_task/src/session/mod.rs

@@ -274,9 +274,13 @@ impl<'a> Session<'a> {
                         self.plan_from_cli_run_resolved(cwd, run_command.clone()).await?;
 
                     if graph.graph.node_count() == 0 {
-                        // No tasks matched. With is_cwd_only (no scope flags) the
-                        // task name is a typo — show the selector. Otherwise error.
-                        if is_cwd_only {
+                        // No tasks matched. Show the interactive selector only when
+                        // the command has no scope flags and no execution flags
+                        // (concurrency-limit, parallel) — otherwise the user intended
+                        // a specific execution mode and a typo should be an error.
+                        let has_execution_flags = run_command.flags.concurrency_limit.is_some()
+                            || run_command.flags.parallel;
+                        if is_cwd_only && !has_execution_flags {
                             let qpr = self.handle_no_task(is_interactive, &run_command).await?;
                             self.plan_from_query(qpr).await?
                         } else {