diff --git a/src/devtools/tests.ts b/src/devtools/tests.ts
index d62d9ee..2d8dc01 100644
--- a/src/devtools/tests.ts
+++ b/src/devtools/tests.ts
@@ -10199,6 +10199,153 @@ export function registerAllTests(): void {
     })
   })
 
+  suite('ui — camera framing', () => {
+    function resetPropertySectionPrefs() {
+      try {
+        localStorage.removeItem('animatr:propSections')
+      } catch {
+        /* noop */
+      }
+    }
+
+    function stubLaneRect(lane: HTMLElement, width = 1000): void {
+      const fakeRect = {
+        left: 0,
+        top: 0,
+        width,
+        height: 20,
+        right: width,
+        bottom: 20,
+        x: 0,
+        y: 0,
+        toJSON: () => ({}),
+      } as DOMRect
+      ;(lane as unknown as { getBoundingClientRect: () => DOMRect }).getBoundingClientRect = () =>
+        fakeRect
+    }
+
+    test('stage camera button enables camera without resizing the editor stage', async () => {
+      const s = makeFreshStore()
+      s.scene.canvas.width = 640
+      s.scene.canvas.height = 360
+      const handle = mountComponent(CanvasStage, {})
+      try {
+        await nextTick()
+        const dims = handle.host.querySelector('.dims') as HTMLElement
+        const btn = handle.host.querySelector('.zoom-controls .camera-btn') as HTMLButtonElement
+        expect(dims).toBeTruthy()
+        expect(btn).toBeTruthy()
+        expect(dims.textContent?.trim()).toBe('640 × 360')
+        expect(s.scene.camera).toBe(undefined)
+
+        btn.click()
+        await nextTick()
+        expect(s.scene.camera?.enabled).toBe(true)
+        expect(s.selectedCamera).toBe(true)
+        expect(btn.classList.contains('active')).toBe(true)
+        expect(dims.textContent?.trim()).toBe('640 × 360')
+        expect(s.scene.canvas.width).toBe(640)
+        expect(s.scene.canvas.height).toBe(360)
+
+        btn.click()
+        await nextTick()
+        expect(s.scene.camera?.enabled).toBe(false)
+        expect(dims.textContent?.trim()).toBe('640 × 360')
+      } finally {
+        handle.unmount()
+      }
+    })
+
+    test('properties panel edits the selected camera frame, not scene canvas size', async () => {
+      resetPropertySectionPrefs()
+      const s = makeFreshStore()
+      s.scene.canvas.width = 800
+      s.scene.canvas.height = 450
+      s.enableCamera()
+      s.selectCamera(true)
+      const handle = mountComponent(PropertiesPanel, {})
+      try {
+        await nextTick()
+        const banner = handle.host.querySelector('.multi-banner') as HTMLElement
+        expect(banner.textContent).toContain(i18nT('properties.camera.banner'))
+        const inputs = handle.host.querySelectorAll<HTMLInputElement>(
+          '.prop-group input[type="number"]',
+        )
+        expect(inputs.length).toBe(4)
+        const [xInput, yInput, widthInput, heightInput] = Array.from(inputs)
+        expect(Number(widthInput.value)).toBe(800)
+        expect(Number(heightInput.value)).toBe(450)
+
+        xInput.value = '24'
+        xInput.dispatchEvent(new Event('input', { bubbles: true }))
+        widthInput.value = '320'
+        widthInput.dispatchEvent(new Event('input', { bubbles: true }))
+        await nextTick()
+
+        expect(s.scene.camera?.keyframes.length).toBe(1)
+        expect(s.scene.camera?.keyframes[0].props.x).toBe(24)
+        expect(s.scene.camera?.keyframes[0].props.width).toBe(320)
+        expect(s.scene.canvas.width).toBe(800)
+        expect(s.scene.canvas.height).toBe(450)
+        void yInput
+      } finally {
+        handle.unmount()
+      }
+    })
+
+    test('timeline camera row selects, hides, locks, and adds camera keyframes', async () => {
+      const s = makeFreshStore()
+      s.setDuration(10)
+      s.enableCamera()
+      s.selectCamera(false)
+      const handle = mountComponent(Timeline, {})
+      try {
+        await nextTick()
+        const trackName = handle.host.querySelector('.camera-track .track-name') as HTMLElement
+        const eye = handle.host.querySelector('.camera-track .eye-btn') as HTMLButtonElement
+        const lock = handle.host.querySelector('.camera-track .lock-btn') as HTMLButtonElement
+        const lane = handle.host.querySelector('.camera-track .camera-lane') as HTMLElement
+        expect(trackName).toBeTruthy()
+        expect(eye).toBeTruthy()
+        expect(lock).toBeTruthy()
+        expect(lane).toBeTruthy()
+
+        trackName.click()
+        await nextTick()
+        expect(s.selectedCamera).toBe(true)
+
+        eye.click()
+        await nextTick()
+        expect(s.scene.camera?.overlayVisible).toBe(false)
+        expect(eye.classList.contains('hidden')).toBe(true)
+
+        lock.click()
+        await nextTick()
+        expect(s.scene.camera?.locked).toBe(true)
+        expect(lock.classList.contains('locked')).toBe(true)
+
+        stubLaneRect(lane)
+        lane.dispatchEvent(
+          new MouseEvent('dblclick', { bubbles: true, cancelable: true, clientX: 500 }),
+        )
+        await nextTick()
+        expect(s.scene.camera?.keyframes.length).toBe(0)
+
+        lock.click()
+        await nextTick()
+        lane.dispatchEvent(
+          new MouseEvent('dblclick', { bubbles: true, cancelable: true, clientX: 500 }),
+        )
+        await nextTick()
+        expect(s.scene.camera?.keyframes.length).toBe(1)
+        expect(Math.abs((s.scene.camera?.keyframes[0].time ?? 0) - 5) < 0.1).toBe(true)
+        expect(Math.abs(s.playhead - 5) < 0.1).toBe(true)
+      } finally {
+        handle.unmount()
+      }
+    })
+  })
+
   suite('ui — CanvasStage centre crosshair (Konva)', () => {
     // Verify the lines actually render at the correct coordinates in
     // Konva when the toggle is on. Requires a proper VueKonva mount.