Complete memory leak review and add comprehensive fixes with documentation

Co-authored-by: Kuingsmile <96409857+Kuingsmile@users.noreply.github.com>

tests/memoryIntegration.test.ts

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+// memoryIntegration.test.ts
+import { afterEach, beforeEach, describe, expect, it, vi } from 'vitest'
+
+// Mock electron to avoid issues in test environment
+vi.mock('electron', () => ({
+  ipcMain: {
+    on: vi.fn(),
+    once: vi.fn(),
+    removeListener: vi.fn(),
+    removeAllListeners: vi.fn()
+  }
+}))
+
+describe('Memory Monitoring Integration', () => {
+  beforeEach(() => {
+    vi.clearAllMocks()
+  })
+
+  afterEach(() => {
+    vi.clearAllTimers()
+  })
+
+  it('should simulate real-world memory usage patterns', async () => {
+    // Import after mocking
+    const { MemoryMonitor } = await import('../src/main/utils/performanceOptimizer')
+    
+    let memoryGrowth = 0
+    const mockMemoryUsage = vi.fn(() => {
+      memoryGrowth += 1024 * 1024 // 1MB growth per call
+      return {
+        rss: 100 * 1024 * 1024 + memoryGrowth,
+        heapTotal: 80 * 1024 * 1024,
+        heapUsed: 50 * 1024 * 1024 + (memoryGrowth / 2),
+        external: 20 * 1024 * 1024
+      }
+    })
+    
+    // Mock process.memoryUsage
+    vi.stubGlobal('process', {
+      ...process,
+      memoryUsage: mockMemoryUsage
+    })
+
+    // Mock console methods to capture output
+    const logSpy = vi.spyOn(console, 'log').mockImplementation(() => {})
+    const warnSpy = vi.spyOn(console, 'warn').mockImplementation(() => {})
+
+    // Start monitoring with short interval for testing
+    MemoryMonitor.start(50)
+
+    // Wait for several monitoring cycles
+    await new Promise(resolve => setTimeout(resolve, 250))
+
+    // Verify monitoring occurred
+    expect(mockMemoryUsage).toHaveBeenCalled()
+    expect(logSpy).toHaveBeenCalledWith(
+      expect.stringContaining('[Memory] RSS:')
+    )
+
+    // Clean up
+    MemoryMonitor.stop()
+    logSpy.mockRestore()
+    warnSpy.mockRestore()
+  })
+
+  it('should handle memory statistics correctly', async () => {
+    const { MemoryMonitor } = await import('../src/main/utils/performanceOptimizer')
+    
+    const mockMemoryUsage = vi.fn(() => ({
+      rss: 100 * 1024 * 1024,
+      heapTotal: 80 * 1024 * 1024,
+      heapUsed: 50 * 1024 * 1024,
+      external: 20 * 1024 * 1024
+    }))
+    
+    vi.stubGlobal('process', {
+      ...process,
+      memoryUsage: mockMemoryUsage
+    })
+
+    MemoryMonitor.start(20)
+    
+    // Wait for some data collection
+    await new Promise(resolve => setTimeout(resolve, 100))
+    
+    const stats = MemoryMonitor.getMemoryStats()
+    expect(stats).toBeDefined()
+    expect(stats!.current).toBeDefined()
+    expect(stats!.historyLength).toBeGreaterThan(0)
+    expect(stats!.ipcStats).toBeDefined()
+
+    MemoryMonitor.stop()
+  })
+})