DateRangePicker clears date when entering first character into time input

### Provide a general summary of the issue here

When using a `DateRangePicker` and setting `granularity` dynamically from `"day"` to `"second"`, the date input gets cleared when entering the first character of the time input. See repro steps below for video, detailed steps & minimal repro code.

### 🤔 Expected Behavior?

When entering the time, the date that the user just entered should not be cleared.

### 😯 Current Behavior

When entering the time, the date that the user just entered is cleared. This only happens the first time.

### 💁 Possible Solution

Work-around: set a `key` based on the `granularity` to force React to create a new component instance with new internal state whenever `granularity` changes.

### 🔦 Context

_No response_

### 🖥️ Steps to Reproduce

See screen recording & minimal repro code below.

Steps to repro:
1. Change the `granularity` from `"day"` to `"second"`. This is important. When making the granularity static/hard-coded, the bug doesn't happen.
2. Start typing the date.
3. When the first character of the time is entered, the date input is cleared again!

https://github.com/user-attachments/assets/295aff8e-6e57-4d07-b1c3-d48d260ede3c

```
export function BugRepro() {
const [granularity, setGranularity] = useState<"day" | "second">("day");

const [minValue, setMinValue] = useState();
const [maxValue, setMaxValue] = useState();
const onChange = useCallback((newDateRange: DateRange | undefined) => {
setMinValue(newDateRange?.start);
setMaxValue(newDateRange?.end);
}, []);

return (

### Version

1.4.1

### What browsers are you seeing the problem on?

Chrome

### If other, please specify.

_No response_

### What operating system are you using?

macOS / Ubuntu

### 🧢 Your Company/Team

_No response_

### 🕷 Tracking Issue

_No response_

Start with the DateRangePicker, DateInput, and DateSegment entry points and reproduce the issue using the provided BugRepro component. Verify the behavior when granularity changes from "day" to "second", then confirm that entering the first time character preserves the date value.

Written by the indexing model from the issue text.