[YIWANG3]

PR 3 of docs/feature-modules-plan.md §8, after #257 (LUT) and #258 (AI Repaint). From main, zero behaviour change.

Moved (git mv)

• electron/ipc/stickers.js → features/sticker/electron/stickers.js. The helper path comes from host.nativeBin now instead of an isPackaged branch of its own. New stickers.test.js (5 tests): channels match the manifest; save → list → star → delete round trip with thumbnails; thumbnail backfill; detect's three refusals; scratch cleanup only removes the feature's own folders.
• StickerPanel.jsx, StickerRegionOverlay.jsx, StickerView.jsx, hooks/useStickerViewKeys.js → features/sticker/renderer/. state/useStickerRegion.js moved and became useStickerTool.js (the tool's whole state). The old state/useStickerTool.js is deleted: it only composed the region with useStickerImageCache, and the image cache is the editor core's (layers carry stickers whether or not this module is present), so EditorOverlay calls useStickerImageCache(layers) directly.

New manifest fields, and who reads them

field	reader
helper: "extract-sticker"	electron/features.js → capability off when the binary is missing; capabilities.js's hand-written table is down to depth / people
editorTool.overlay: true	features/index.js adds Overlay to the editorToolFeatures row; EditorOverlay renders the active tool's overlay with { imageRect, tool } (featureTools = { lut, sticker } keyed by rail key)
sidebarView: { id: "stickers", labelKey, unavailable: "locked" }	sidebarViews table; Sidebar.jsx maps it (props activeView / onOpenView(id) replace stickerMode / onOpenStickerBrowser); App.jsx hosts <View> / <Inspector> and takes the Lightbox items, index and keyboard handler from the feature's useView; show_in_app's view enum is built from the manifests (same 5 values)
layerSource: { id: "stickers", labelKey, hideLabelKey }	layerSources table; TextPanel renders one picker button per row, StickerPickerModal takes a source and uses source.list() / source.thumbUrl()

Decisions §8 left open

• Hooks stay explicit imports. Three samples in, each is one import line and one call; featureTools and featureViewStates hand the results to the table-driven parts. A useFeatureTools with an eslint exception can wait for the manifest freeze.
• Panels are not table-driven (props differ per tool); the sticker panel is a lazy chunk in <Suspense> like LUT's. mount: "always" stays hand-written.
• editorStateModel untouched: the region never enters history.

Not moved

native/extract-sticker.swift (build scripts know the path); i18n (stickerView namespace, sidebar.stickers, sticker.* — after the three PRs, per §11); the Library settings' "sticker library" open-folder row (a cache-storage row backed by the host's appSettings.js kind table, shown on Windows too); the web bridge's stickerList: async () => []. IPC_METHODS is still 183 rows.

Verified

• npm run lint clean; test:electron 295 (was 290); test:renderer 432; npm run build (StickerPanel is its own chunk).
• Acceptance specs 02-navigation, 03-editor, 04-sticker, 08-mcp-http, 19-editor-layers, 24-handwriting, 31-ui-regressions, 43-sticker-library: 44 passed.
• Full npm run e2e is running; result in the thread.
• Not done: e2e:coverage, npm run pack.

Docs: plan status line, §8 as-built record and timetable; docs/README.md rows; apps/desktop/features/README.md layout and reader list.

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