feat(rain): add date preset picker and reduce time clarification prompts.

Default to last 3 days in UI and backend, only ask when time is truly ambiguous, and treat「做成页面」as HTML report pages without follow-up questions.

Co-authored-by: Cursor <cursoragent@cursor.com>

src/hooks/useTKMindChat.ts

@@ -100,6 +100,7 @@ type ChatSubmitOptions = {
   pgRequired?: boolean;
   imageGenerationMode?: ImageGenerationMode;
   selectedChatSkill?: string;
+  rainTimePreset?: import('../utils/rainTimeRange').RainTimePresetId;
   fileAttachments?: ChatFileAttachment[];
   goalRunId?: string;
 };
@@ -1874,6 +1875,7 @@ export function useTKMindChat(
           ...(options?.pgRequired ? { pgRequired: true } : {}),
           imageGenerationMode: options?.imageGenerationMode ?? 'auto',
           ...(options?.selectedChatSkill ? { selectedChatSkill: options.selectedChatSkill } : {}),
+          ...(options?.rainTimePreset ? { rainTimePreset: options.rainTimePreset } : {}),
         },
       };