Release v1.1.7

Previous: v1.1.6
Commits: 12

docs: add proxy fetch failed troubleshooting
[agent] feat: canvas eraser segment-cut splits + object/brush eraser cursors and toolbar polish
[agent] feat: preview-first prompt import (local + GitHub) with dialog UI and route
[agent] feat: add ComfyUI ima2_gen_bridge custom node + package files allowlist + smoke check
test: align canvas memo shortcut contract
feat: add local ComfyUI image export bridge
feat: refine generation controls and web search options
test: cover canvas eraser and object key behavior
feat: extend canvas editing and version workflows
docs: update planning lanes for canvas and ComfyUI
feat: add history thumbnail layout setting
feat: add canvas annotation tools

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