Add AI task composition for routines (bot + web client)

Users can now describe a goal and have AI auto-generate 4-7 ADHD-friendly
steps, which they can review and modify before saving.

- ai/ai_config.json: Add step_generator prompt and ai_compose examples
  to command_parser so bot recognises vague task descriptions
- api/routes/ai.py: New POST /api/ai/generate-steps endpoint — calls
  LLM via ai_parser, validates and sanitises returned steps
- api/main.py: Register new ai_routes module
- bot/commands/routines.py: Add ai_compose action — generates steps,
  shows numbered list with durations, uses existing yes/no confirm flow
- synculous-client/src/lib/api.ts: Add api.ai.generateSteps(goal)
- synculous-client/src/app/dashboard/routines/new/page.tsx: Add
  Generate with AI panel with collapsible textarea, loading spinner,
  and inline error; generated steps slot into existing editable list

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

synculous-client/src/lib/api.ts

@@ -1051,6 +1051,14 @@ export const api = {
       });
     },
   },
+
+  ai: {
+    generateSteps: (goal: string) =>
+      request<{ steps: { name: string; duration_minutes: number }[] }>(
+        '/api/ai/generate-steps',
+        { method: 'POST', body: JSON.stringify({ goal }) }
+      ),
+  },
 };
 
 export default api;