feat(web): add tooltip to composer file mention pill

[GuilhermeVieiraDev]

What Changed

Migrated ComposerMentionNode from TextNode to DecoratorNode and added a <Tooltip /> that shows the full file path on hover. Also cleaned up the offset/selection functions to use isComposerInlineTokenNode instead of per-type instanceof checks.

Why

The mention pill only shows the basename, so when multiple files share the same name (e.g. src/utils/index.ts and src/api/index.ts) there's no way to tell them apart. ComposerMentionNode was the only inline chip still on TextNode, Skills and Terminal already used DecoratorNode, so this aligns all three and enables proper <Tooltip /> support.

UI Changes

Checklist

• This PR is small and focused
• I explained what changed and why
• I included before/after screenshots for any UI changes
• I included a video for animation/interaction changes

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Note

Medium Risk
Moderate risk because it refactors the Lexical ComposerMentionNode from a TextNode to a DecoratorNode, which can affect editor serialization and cursor/selection behavior around inline tokens.

Overview
Shows the full file path when hovering a composer file mention chip by rendering the mention as a DecoratorNode with a Tooltip (while still displaying only the basename in the chip).

This removes the previous manual DOM rendering/update logic for mention chips, adjusts mention JSON import/export to the new node type, and consolidates selection/offset calculations to treat mentions the same as other inline token nodes via isComposerInlineTokenNode.

^{Reviewed by Cursor Bugbot for commit 0311e7d. Bugbot is set up for automated code reviews on this repo. Configure here.}

Note

Show full file path on composer mention pill hover

• Refactors ComposerMentionNode in ComposerPromptEditor.tsx from a TextNode to a DecoratorNode, switching from imperative DOM rendering to a new ComposerMentionDecorator React component.
• The decorator renders an inline, non-editable chip with an icon and label, wrapped in a tooltip that displays the full file path on hover.
• Consolidates offset and selection point utilities to handle mention nodes via the generic isComposerInlineTokenNode path, removing mention-specific branches.
• Behavioral Change: mention nodes now serialize as SerializedLexicalNode instead of SerializedTextNode; existing serialized mention data may need re-validation.

^{Macroscope summarized 0311e7d.}

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[GuilhermeVieiraDev]

Worth noting: ComposerMentionNode is the only inline chip still extending TextNode, Skills and Terminal both use DecoratorNode. If there's interest in aligning them I'm happy to take that on as a follow-up.

[macroscopeapp]

Approvability

Verdict: Approved

Minor UI enhancement adding a tooltip to file mention pills in the composer. The refactoring from TextNode to DecoratorNode is a standard Lexical pattern change to enable React-based tooltip rendering. Changes are self-contained with net negative lines and no runtime behavior changes beyond the additive tooltip feature.

^{You can customize Macroscope's approvability policy. Learn more.}

[juliusmarminge]

should use <Tooltip /> like skills:

Dismissing prior approval to re-evaluate 0311e7d

[GuilhermeVieiraDev]

Yeah I noticed that earlier, but was trying to keep it simple. ComposerMentionNode was the only one using TextNode still, so to have proper Tooltip support I did the refactor and migrated the mention node to DecoratorNode as well.