refactor(idurar-erp-crm): remove unused utils helpers and dead Redux crud selectors

[augmentcode]

^{PR Author Agent⚡}

Summary

Pure dead-code removal in idurar-erp-crm/frontend — no behaviour changes, no new dependencies.

frontend/src/utils

File	Change
tagColor.js	Deleted — never imported anywhere in the codebase
helpers.js	Removed has, toFormData, formatDate, isDate, formatDatetime, and the Object.byString prototype side-effect; kept valueByString and validatePhoneNumber (both imported)
valueType.js	Kept only isObject (used in useNetwork.jsx); removed isFunction, isString, isBoolean, isNumber, isUndef
color.js	Removed the selectColor named export (nothing imports it); default color array kept
dataStructure.jsx	Removed the unexported getRandomColor helper (defined but never called)

frontend/src/redux/crud/selectors.js

Removed selectItemById and selectReadItem — confirmed by grep that no file in the frontend imports either from this module. (The same-named selectors in redux/erp/selectors.js are actively used and untouched.)

Verification

After the removals, the following grep queries return zero results in frontend/src/:

from.*utils/tagColor
selectItemById.*crud  |  selectReadItem.*crud (in imports)
selectColor
getRandomColor
toFormData | formatDatetime | export.*isDate | export.*formatDate
isFunction | isBoolean | isNumber | isUndef

All existing imports (valueByString, validatePhoneNumber, isObject, isBrowser, tagColor from statusTagColor, calculate, color, countryList, currencyList, dataForTable, dataForRead) continue to resolve correctly.

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Pull Request opened by Augment Code | View session

[augmentcode]

^{PR Author Agent⚡}

👋 I've got this PR — here's what I'll handle for you:

• Review feedback — implement suggestions, answer questions, fix what comes up
• CI failures — I get pinged when checks fail and try to fix them
• Merge conflicts — bring the PR back up to date when it falls behind
• Merge gates — watch CI, reviews, and verification
• Ping you the moment it's ready to merge

Marking it ready and picking reviewers are your call — I'll leave both alone.

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