feat: implement smart speed UI and state persistence

test/client/store/user.test.js

@@ -0,0 +1,65 @@
+import { state, mutations } from '../../../client/store/user.js'
+import { expect } from 'chai'
+
+describe('User Store Mutations', () => {
+  let mockState
+
+  beforeEach(() => {
+    mockState = state()
+    // Mock localStorage
+    global.localStorage = {
+      store: {},
+      getItem(key) {
+        return this.store[key] || null
+      },
+      setItem(key, value) {
+        this.store[key] = value
+      },
+      removeItem(key) {
+        delete this.store[key]
+      }
+    }
+  })
+
+  it('Default state has enableSmartSpeed = false', () => {
+    expect(mockState.settings.enableSmartSpeed).to.be.false
+  })
+
+  it('Default state has smartSpeedRatio = 2.5', () => {
+    expect(mockState.settings.smartSpeedRatio).to.equal(2.5)
+  })
+
+  it('SET_SMART_SPEED_ENABLED mutation toggles the value', () => {
+    mutations.SET_SMART_SPEED_ENABLED(mockState)
+    expect(mockState.settings.enableSmartSpeed).to.be.true
+    mutations.SET_SMART_SPEED_ENABLED(mockState)
+    expect(mockState.settings.enableSmartSpeed).to.be.false
+    
+    // Check setting explicitly
+    mutations.SET_SMART_SPEED_ENABLED(mockState, true)
+    expect(mockState.settings.enableSmartSpeed).to.be.true
+  })
+
+  it('SET_SMART_SPEED_RATIO mutation sets the value', () => {
+    mutations.SET_SMART_SPEED_RATIO(mockState, 3.0)
+    expect(mockState.settings.smartSpeedRatio).to.equal(3.0)
+  })
+
+  it('Ratio is clamped to valid range [1.5, 5.0]', () => {
+    mutations.SET_SMART_SPEED_RATIO(mockState, 1.0)
+    expect(mockState.settings.smartSpeedRatio).to.equal(1.5)
+
+    mutations.SET_SMART_SPEED_RATIO(mockState, 6.0)
+    expect(mockState.settings.smartSpeedRatio).to.equal(5.0)
+  })
+
+  it('Settings persist to localStorage', () => {
+    mutations.SET_SMART_SPEED_ENABLED(mockState, true)
+    let savedSettings = JSON.parse(localStorage.getItem('userSettings'))
+    expect(savedSettings.enableSmartSpeed).to.be.true
+
+    mutations.SET_SMART_SPEED_RATIO(mockState, 4.0)
+    savedSettings = JSON.parse(localStorage.getItem('userSettings'))
+    expect(savedSettings.smartSpeedRatio).to.equal(4.0)
+  })
+})