Refactor/use debounce hook in job browse page

[Harkiratcodess]

ficx #125

Problem

JobBrowsePage.tsx manually duplicated debounce logic using
useRef + useEffect + setTimeout instead of using the
existing reusable useDebounce hook at client/src/hooks/useDebounce.ts.
This violates DRY and makes the code harder to maintain.

Fix

Replaced manual debounce implementation with two useDebounce calls:

• const debouncedSearch = useDebounce(search, 400)
• const debouncedLocation = useDebounce(locationFilter, 400)

Also removed:

• timerRef (no longer needed)
• debouncedSearch and debouncedLocation useState declarations
• submitSearch function (no longer needed)
• useEffect and useRef imports (no longer used)

Files Changed

• client/src/module/student/jobs/JobBrowsePage.tsx

Note

The existing useDebounce hook at client/src/hooks/useDebounce.ts
was already being used in other parts of the codebase. This PR
brings JobBrowsePage in line with that pattern.

Label Request

Requesting refactor label for this PR.

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📥 Commits

Reviewing files that changed from the base of the PR and between 3552efa and 1b0e24a.

📒 Files selected for processing (3)

• client/src/components/Navbar.tsx
• client/src/module/student/companies/CompanyListPage.tsx
• client/src/module/student/jobs/JobBrowsePage.tsx

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