fix: nan issue when typing incomplete scientific notation

[abdimo101]

Description

This PR refactors the handling of condition values in datasets filter component.

Motivation

Previously the condition values was updated in the global state immediately as the user typed, causing issues when entering partial scientific notation (e.g typing "3e" would result in the value being set to NaN).

Fixes:

Please provide a list of the fixes implemented in this PR

• Items added

Changes:

Please provide a list of the changes implemented by this PR

• changes made

Tests included

• Included for each change/fix?
• Passing? (Merge will not be approved unless this is checked)

Documentation

• swagger documentation updated [required]
• official documentation updated [nice-to-have]

official documentation info

If you have updated the official documentation, please provide PR # and URL of the pages where the updates are included

Backend version

• Does it require a specific version of the backend
• which version of the backend is required:

Summary by Sourcery

Refactor the datasets filter component to buffer raw input values and defer updating the global state until filter application, fixing NaN errors when entering incomplete scientific notation

Bug Fixes:

• Prevent NaN assignment by handling partial scientific notation input before parsing

Enhancements:

• Add tempConditionValues buffer to hold raw input strings
• Refactor updateConditionValue to store input in tempConditionValues instead of immediately dispatching state updates
• Process and cast buffered values on apply, then dispatch remove/add condition actions, update user settings, and fetch datasets

[sourcery-ai]

Hey there - I've reviewed your changes - here's some feedback:

• Consider extracting the updatedConditions mapping logic into a dedicated helper function to improve readability and testability.
• Ensure tempConditionValues is initialized or reset whenever conditionConfigs changes to avoid stale or misaligned buffered inputs.

Prompt for AI Agents

Please address the comments from this code review:

## Overall Comments
- Consider extracting the updatedConditions mapping logic into a dedicated helper function to improve readability and testability.
- Ensure tempConditionValues is initialized or reset whenever conditionConfigs changes to avoid stale or misaligned buffered inputs.

## Individual Comments

### Comment 1
<location> `src/app/datasets/datasets-filter/datasets-filter.component.ts:248-249` </location>
<code_context>
+              condition: {
+                ...config.condition,
+                rhs: isNumeric ? Number(value) : value,
+                relation: isNumeric
+                  ? ("EQUAL_TO_NUMERIC" as ScientificCondition["relation"])
+                  : ("EQUAL_TO_STRING" as ScientificCondition["relation"]),
+              },
</code_context>

<issue_to_address>
**nitpick:** Type assertion for relation may be unnecessary if type inference is sufficient.

Remove the type assertion if the assignment is already type-safe and the type checker does not require it.
</issue_to_address>

### Comment 2
<location> `src/app/datasets/datasets-filter/datasets-filter.component.ts:271-272` </location>
<code_context>
+        return config;
+      });
+
+      updatedConditions.forEach((oldCondition) => {
         this.store.dispatch(
           removeScientificConditionAction({
</code_context>

<issue_to_address>
**suggestion:** Variable naming: 'oldCondition' is misleading after mapping to updatedConditions.

Please rename 'oldCondition' to 'condition' or 'updatedCondition' to better reflect its current meaning.

```suggestion
      updatedConditions.forEach((condition) => {
        this.store.dispatch(
          removeScientificConditionAction({
            condition: condition.condition,
        );
      });
```
</issue_to_address>

### Comment 3
<location> `src/app/datasets/datasets-filter/datasets-filter.component.ts:234` </location>
<code_context>

     this.conditionConfigs$.pipe(take(1)).subscribe((conditionConfigs) => {
-      (conditionConfigs || []).forEach((oldCondition) => {
+      const updatedConditions = (conditionConfigs || []).map((config, i) => {
+        if (this.tempConditionValues[i] !== undefined) {
+          const value = this.tempConditionValues[i];
</code_context>

<issue_to_address>
**issue (complexity):** Consider extracting the condition transformation logic into a helper function to improve readability and testability.

Here’s one way to collapse that nested‐branching and spread logic into a single helper, then use it inside your subscription.  This keeps exactly the same behavior but is much easier to read and test.

```ts
// add somewhere in your component (or in a util file)
private transformConfigWithTempValue(
  config: ConditionConfig, 
  tempVal?: string
): ConditionConfig {
  if (tempVal === undefined) {
    return config;
  }

  const isNumeric = tempVal !== '' && !isNaN(Number(tempVal));
  const newCondition: ScientificCondition = {
    ...config.condition,
    rhs: isNumeric ? Number(tempVal) : tempVal,
    // if it was previously EQUAL_TO(_NUMERIC|_STRING), we overwrite;
    // otherwise we just keep the old relation
    relation: isNumeric
      ? 'EQUAL_TO_NUMERIC'
      : 'EQUAL_TO_STRING',
  };

  return { ...config, condition: newCondition };
}
```

Then in your subscription:

```ts
this.conditionConfigs$.pipe(take(1)).subscribe((conditionConfigs) => {
  const updatedConditions = (conditionConfigs || []).map((cfg, idx) =>
    this.transformConfigWithTempValue(cfg, this.tempConditionValues[idx])
  );

  // remove old, add new, update settings, fetch…
  updatedConditions.forEach(c =>
    this.store.dispatch(removeScientificConditionAction({ condition: c.condition }))
  );
  updatedConditions.forEach(c => {
    if (c.enabled && c.condition.lhs && c.condition.rhs) {
      this.store.dispatch(addScientificConditionAction({ condition: c.condition }));
    }
  });
  this.store.dispatch(updateUserSettingsAction({
    property: { conditions: updatedConditions },
  }));
  this.store.dispatch(fetchDatasetsAction());
  this.store.dispatch(fetchFacetCountsAction());
});
```

• Extracting the mapping makes the transformation logic reusable and removes all the nested `if/else` and重复 spread blocks.  
• You can now unit‐test `transformConfigWithTempValue` in isolation without wiring up the whole RxJS pipeline.
</issue_to_address>

---

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[Junjiequan]

Can you add a test for the fix?