fix: memory leak and performance in Last Calls section

[edospadoni]

Problem

A customer with high call volume (~1300 calls/day, 1.8M CDR records) experiences white screen and slowdowns when NethLink stays open on the "Last calls" tab for extended periods.

Root cause analysis identified four issues:

1. Unbounded missedCalls array — Grows indefinitely over time without ever being truncated, consuming increasing amounts of memory
2. O(n²) operations during rendering — prepareCalls() runs missedCalls.map().includes() for every call, and gestLastCalls() uses lodash differenceWith with linear comparisons
3. IPC event listeners without cleanup — 8 listeners registered in NethLinkPage and 1 in the store are never removed, accumulating on every mount/unmount cycle
4. Full array spreads on every update — A complete copy of the entire calls array is created on every update

Changes

usePhoneIslandEventHandler.ts — gestLastCalls()

• Replaced lodash differenceWith with Set for O(1) uniqueid lookups
• Removed lodash import (no longer needed)
• Capped missedCalls at 50 elements (oldest entries are dropped)
• Used Set for deduplication in setMissedCalls instead of array.map().includes()
• Removed unnecessary spread of newLastCalls.rows

LastCallsBox.tsx — prepareCalls()

• Pre-computed missedCallIds as a Set once before the .map() loop
• Replaced missedCalls?.map(c => c.uniqueid).includes(c.uniqueid) (O(n) per call = O(n²) total) with missedCallIds.has(c.uniqueid) (O(1) per call = O(n) total)

NethLinkPage.tsx — IPC listener cleanup

• Moved 8 IPC listener registrations from useInitialize (no cleanup) into the useEffect watching account?.username
• Added cleanup function calling removeAllListeners for all channels
• Kept notification permission request in useInitialize (one-time, no cleanup needed)

store.ts — store listener cleanup

• Added cleanup function in useRegisterStoreHook's useEffect to remove the SHARED_STATE_UPDATED listener and reset isRegistered

[github-actions]

Automatic builds from https://github.com/NethServer/nethlink/actions/runs/22133814277.
Commit: bc7657f

Name	Platform	Link
win-app.exe	Windows (x64)	Link
macos-app-x64.dmg	MacOS (x64)	Link
macos-app-arm64.dmg	MacOS (arm64)	Link
linux-app.AppImage	Linux (x64)	Link