fix(cli): support project slash command completion (#245)

Add project-level slash command discovery with recursive nested command scanning, pass workingDirectory through slash-command handlers, and align hub/web source unions to include project commands.

web/src/hooks/queries/useSlashCommands.ts

@@ -87,7 +87,7 @@ export function useSlashCommands(
         // If API succeeded, add user-defined and plugin commands
         if (query.data?.success && query.data.commands) {
             const extraCommands = query.data.commands.filter(
-                cmd => cmd.source === 'user' || cmd.source === 'plugin'
+                cmd => cmd.source === 'user' || cmd.source === 'plugin' || cmd.source === 'project'
             )
             return [...builtin, ...extraCommands]
         }

web/src/hooks/useActiveSuggestions.ts

@@ -6,7 +6,7 @@ export interface Suggestion {
     label: string
     description?: string
     content?: string  // Expanded content for Codex user prompts
-    source?: 'builtin' | 'user' | 'plugin'
+    source?: 'builtin' | 'user' | 'plugin' | 'project'
 }
 
 interface SuggestionOptions {

web/src/types/api.ts

@@ -151,7 +151,7 @@ export type GitStatusFiles = {
 export type SlashCommand = {
     name: string
     description?: string
-    source: 'builtin' | 'user' | 'plugin'
+    source: 'builtin' | 'user' | 'plugin' | 'project'
     content?: string  // Expanded content for Codex user prompts
     pluginName?: string
 }