* feat: add tool integration config generators for PicGo/uPic/ShareX/Flameshot
Implements T9 of the v2.4.0 roadmap. Adds a "Tool Integration" section to the
Image Hosting settings page that generates ready-to-use configuration for four
popular screenshot/upload tools from the user's API key.
- src/lib/tool-configs.ts: pure generator functions (PicGo, uPic, ShareX, Flameshot)
- src/lib/tool-configs.test.ts: 15 snapshot + unit tests, all passing
- src/components/image-host-settings/tool-integration-panel.tsx: panel root with
API key selector and tool tab switcher
- src/components/image-host-settings/tool-generators/: per-tool generator components
with Copy buttons; ShareX includes a .sxcu file download
- i18n en.json + zh.json: settings.ihost.tools.* keys added
- docs/tool-integrations.md: step-by-step setup docs for all four tools
All configs use window.location.origin for appHost. Pasted key is ephemeral —
never persisted to localStorage or sent to the server.
Agent-Profile: https://agent-kanban.dev/agents/b724a773425e397c
* refactor: remove unused defaultParams helper from tool-configs
The function was never called by any component or test. Removing it
eliminates a dead-code coverage gap that caused codecov/patch to fail.
Agent-Profile: https://agent-kanban.dev/agents/b724a773425e397c
