fish: complete task selectors with short aliases only

Add complete-aliases subcommand that emits tab-separated alias lines without
UUID duplicates. Wire embedded Fish script (__do_task_selectors) to call
complete-aliases; keep complete-uuids unchanged for scripts and tests.

Made-with: Cursor

1 files changed, 6 insertions, 0 deletions

diff --git a/internal/askcli/commands_registry.go b/internal/askcli/commands_registry.go
index 4d8d9ba..1c2e60d 100644
--- a/internal/askcli/commands_registry.go
+++ b/internal/askcli/commands_registry.go
@@ -204,4 +204,10 @@ func init() {
 		handler:             wrapSimpleCommand((*Dispatcher).handleCompleteUUIDs),
 		includeInCompletion: false,
 	})
+	commandRegistry.add(commandEntry{
+		name:                "complete-aliases",
+		description:         "Emit short task selector list for Fish completion",
+		handler:             wrapSimpleCommand((*Dispatcher).handleCompleteAliases),
+		includeInCompletion: false,
+	})
 }