Fix canvas interaction bugs and add advanced photo filters

[MahanKenway]

Motivation

• Fix incorrect/absent hue application and several UI/interaction bugs in the canvas rendering pipeline so sliders behave predictably.
• Add richer adjustment controls (Exposure, Temperature, Tint, Vibrance, Sharpness) and consolidate defaults for reliable preset/reset behavior.
• Improve sticker interaction (hit-testing, drag start, safe cleanup) and address lint purity error from impure ID generation.

Description

• Extended FilterSettings with exposure, temperature, tint, vibrance, and sharpness and added DEFAULT_FILTERS and FILTER_SLIDER_CONFIG to centralize defaults and slider metadata.
• Implemented pixel-pipeline enhancements: applyHueShift and clamp, applied exposure, vibrance, temperature/tint, hue shift, and a sharpen pass that performs a lightweight high-pass sharpen when sharpness > 0.
• Reworked sticker interactions: added getCanvasPoint helper, handleCanvasMouseDown hit-test to start dragging on mousedown, handleCanvasMouseMove updates using canvas coordinates, and removeSticker now clears selected/dragged state.
• Replaced Date.now() sticker IDs with a stable incremental stickerIdRef to satisfy purity lint rules and prevented default page scrolling while moving stickers with arrow keys.
• Updated the Adjust UI to use FILTER_SLIDER_CONFIG so new filters appear in the sliders automatically and presets/reset now apply DEFAULT_FILTERS to avoid state carry-over.

Testing

• Ran npm run lint and it passed (lint issues fixed).
• Ran npm run build and production build completed successfully.
• Captured a UI screenshot via an automated Playwright script against the local dev server to validate the runtime UI (script completed and screenshot produced).

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Codex Task

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Status	Name	Latest Commit	Updated (UTC)
❌ Deployment failed View logs	digi-rawr	de98a62	Feb 21 2026, 01:40 AM

[chatgpt-codex-connector]

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[chatgpt-codex-connector]

Flip vibrance delta so positive values increase saturation

The vibrance adjustment currently pushes each channel toward the dominant channel when filters.vibrance is positive (r/g/b += (max - channel) * amount), which narrows channel differences and desaturates the image; negative vibrance values do the opposite. This makes the Vibrance slider and any preset with vibrance > 0 behave opposite to user expectation (higher vibrance produces flatter colors).

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