[CCS-5] Volume Resize Fix for IOPS and Size (#106)

### Description

On Resize Volume, the form did not show the volume’s current size and
IOPS. It also used the first disk offering in the list, not the offering
already attached to the volume.

So the dialog often opened empty or with the wrong IOPS fields, and a
resize could send the wrong values.

Root cause
Three UI issues in fetchData():

Size unit — the API stores size in bytes. The form label is GB. Size was
never copied onto the form, so the GB field stayed empty.
Wrong offering — the code always used this.offerings[0] (first offering
returned by listDiskOfferings), not this.resource.diskofferingid (the
volume’s offering). Custom size / custom IOPS flags could be wrong.
IOPS not filled — even when min/max IOPS existed on the volume, they
were not copied into form.miniops / form.maxiops.
Steps to reproduce
Create a volume with a custom IOPS disk offering (for example min 2000,
max 5000) and a known size (for example 20 GB).
Open Storage → Volumes → Resize.
Check the Size (GB) field and the Min/Max IOPS fields.
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### Types of changes

- [ ] Breaking change (fix or feature that would cause existing
functionality to change)
- [ ] New feature (non-breaking change which adds functionality)
- [ ] Bug fix (non-breaking change which fixes an issue)
- [ ] Enhancement (improves an existing feature and functionality)
- [ ] Cleanup (Code refactoring and cleanup, that may add test cases)
- [ ] Build/CI
- [ ] Test (unit or integration test code)

### Feature/Enhancement Scale or Bug Severity

#### Feature/Enhancement Scale

- [ ] Major
- [ ] Minor

#### Bug Severity

- [ ] BLOCKER
- [ ] Critical
- [ ] Major
- [ ] Minor
- [ ] Trivial

### Screenshots (if appropriate):
Before Fix:
<img width="533" height="353" alt="image"
src="https://github.com/user-attachments/assets/ccfc698e-501c-442e-a7b2-9582dc2a53ba"
/>

After Fix:
<img width="528" height="472" alt="image"
src="https://github.com/user-attachments/assets/5125bb21-9b9b-4e48-a9bc-8d5eaef07118"
/>


### How Has This Been Tested?

Tested with both Fix and Custom IOPS:
1- Resize Shows IOPS value for custom IOPS not for fix, along with size
2- Exact 20 GB volume → shows as 20
float 20.1 -> shows on UI as 20

#### How did you try to break this feature and the system with this
change?

<!-- see how your change affects other areas of the code, etc. -->

<!-- Please read the
[CONTRIBUTING](https://github.com/apache/cloudstack/blob/main/CONTRIBUTING.md)
document -->

---------

Co-authored-by: Gupta, Surya <Surya.Gupta@netapp.com>

Author: 2 people

ui/src/views/storage/ResizeVolume.vue

@@ -83,8 +83,6 @@ export default {
   },
   data () {
     return {
-      offerings: [],
-      customDiskOffering: false,
       loading: false,
       customDiskOfferingIops: false
     }
@@ -105,14 +103,23 @@ export default {
     },
     fetchData () {
       this.loading = true
+      if (this.resource.size != null) {
+        this.form.size = this.resource.size / (1024 * 1024 * 1024)
+      }
+      if (!this.resource.diskofferingid) {
+        this.loading = false
+        return
+      }
       getAPI('listDiskOfferings', {
-        zoneid: this.resource.zoneid,
-        listall: true
+        id: this.resource.diskofferingid,
+        state: 'all'
       }).then(json => {
-        this.offerings = json.listdiskofferingsresponse.diskoffering || []
-        this.form.diskofferingid = this.offerings[0].id || ''
-        this.customDiskOffering = this.offerings[0].iscustomized || false
-        this.customDiskOfferingIops = this.offerings[0].iscustomizediops || false
+        const currentOffering = (json.listdiskofferingsresponse.diskoffering || [])[0]
+        this.customDiskOfferingIops = currentOffering?.iscustomizediops || false
+        if (this.customDiskOfferingIops) {
+          this.form.miniops = this.resource.miniops
+          this.form.maxiops = this.resource.maxiops
+        }
       }).finally(() => {
         this.loading = false
       })