fix(cortex): update date handling in API and UI components

- Adjusted date handling in the agenda API to ensure optional parameters for start, end, and label are correctly processed.
- Enhanced chat input and action parser to support optional date labels for relative dates.
- Updated agenda components to handle date ranges and loading states more effectively.
- Improved error handling and loading indicators in the agenda block for better user experience.

This commit ensures consistency in date handling across the application, aligning with the new requirements for relative date inputs.

components/cortex/chat/chat-input.tsx

@@ -23,6 +23,7 @@ interface ChatInputProps {
 export interface ChatInputHandle {
   focus: () => void;
   clear: () => void;
+  setValue: (value: string) => void;
 }
 
 export const ChatInput = forwardRef<ChatInputHandle, ChatInputProps>(function ChatInput({
@@ -34,7 +35,7 @@ export const ChatInput = forwardRef<ChatInputHandle, ChatInputProps>(function Ch
   const textareaRef = useRef<HTMLTextAreaElement>(null);
   const addChatMessage = useCortexStore((s) => s.addChatMessage);
 
-  // Expose focus and clear methods to parent
+  // Expose focus, clear, and setValue methods to parent
   useImperativeHandle(ref, () => ({
     focus: () => {
       textareaRef.current?.focus();
@@ -45,6 +46,21 @@ export const ChatInput = forwardRef<ChatInputHandle, ChatInputProps>(function Ch
         textareaRef.current.style.height = 'auto';
       }
     },
+    setValue: (value: string) => {
+      setInputValue(value);
+      // Auto-resize after setting value
+      if (textareaRef.current) {
+        textareaRef.current.style.height = 'auto';
+        // Use setTimeout to ensure the value is set before measuring
+        setTimeout(() => {
+          if (textareaRef.current) {
+            textareaRef.current.style.height = `${textareaRef.current.scrollHeight}px`;
+          }
+        }, 0);
+      }
+      // Focus the input after setting value
+      textareaRef.current?.focus();
+    },
   }));
 
   // Handle input change and auto-resize