feat: add --prompt alias for text chat and search web subcommand

- text chat: accept --prompt as alias for --message for consistency
  with other commands (image, music, speech all use --prompt)
- search: register 'search web' as alias for 'search query'

Author: RyanLee-Dev

src/commands/text/chat.ts

@@ -44,6 +44,11 @@ function parseMessages(flags: GlobalFlags): ParsedMessages {
     }
   }
 
+  // --prompt is an alias for --message
+  if (!flags.message && flags.prompt) {
+    flags.message = Array.isArray(flags.prompt) ? flags.prompt : [flags.prompt as string];
+  }
+
   if (flags.message) {
     const validRoles = new Set(['system', 'user', 'assistant']);
     const msgs = flags.message as string[];

src/registry.ts

@@ -277,6 +277,7 @@ export const registry = new CommandRegistry({
   'music generate':    musicGenerate,
   'music cover':       musicCover,
   'search query':      searchQuery,
+  'search web':        searchQuery,
   'vision describe':   visionDescribe,
   'quota show':       quotaShow,
   'config show':          configShow,