refactor(ui): isolate file presentation state

[benvinegar]

Summary

• extract file-presentation selection, availability, bulk actions, menus, and extension controls into useFilePresentationController
• extract layout preparation and bounded row-render warning handling into useFilePresentationRendering
• keep shared row-failure metadata in the file-view feature layer and add focused controller/rendering coverage

Validation

• bun run typecheck
• bun run format:check
• bun run lint
• bun run test (1,757 pass, 9 skip)
• bun run test:integration (85 pass, 1 skip)
• bun run test:tty-smoke (9 pass)

This PR description was generated by Pi using OpenAI GPT-5.3 Codex

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Project	Deployment	Actions	Updated (UTC)
hunk-web	Ready	Preview	Jul 31, 2026 5:43pm

[greptile-apps]

Greptile Summary

Refactors file-presentation behavior without changing its external contract.

• Extracts presentation selection, availability, menus, bulk actions, and extension controls into useFilePresentationController.
• Extracts custom-view layout preparation and bounded row-warning handling into useFilePresentationRendering.
• Moves shared row-failure metadata into the file-view feature layer and adds focused controller and rendering tests.

Confidence Score: 5/5

The PR appears safe to merge, with the extracted hooks preserving the previous file-presentation behavior and adding focused coverage.

The controller and rendering logic remain behaviorally aligned with their former inline implementations, and the type relocation uses type-only imports without introducing runtime module dependencies.

Important Files Changed

Filename	Overview
src/ui/App.tsx	Replaces inline file-presentation orchestration with the two extracted hooks while preserving existing command, menu, extension, and rendering wiring.
src/ui/fileViews/useFilePresentationController.ts	Encapsulates presentation selection, reconciliation, draft availability, bulk application, menus, and live extension controls with focused regression coverage.
src/ui/fileViews/useFilePresentationRendering.ts	Encapsulates layout preparation and generation-aware, bounded row-warning deduplication without changing the prior behavior.
src/ui/fileViews/types.ts	Moves shared row-failure metadata to a dependency-free type-only module, reducing pane-layer coupling.
src/ui/components/panes/FileView.tsx	Updates the row-failure type import to the new feature-layer module with no runtime behavior change.

Flowchart

%%{init: {'theme': 'neutral'}}%%
flowchart LR
  App[App] --> Controller[useFilePresentationController]
  App --> Rendering[useFilePresentationRendering]
  Controller --> Selection[Selection and availability state]
  Controller --> Controls[Menus, bulk actions, extension controls]
  Rendering --> Layouts[useFileViewLayouts]
  Rendering --> Warnings[Bounded row-failure warnings]
  Layouts --> DiffPane[DiffPane]
  Warnings --> DiffPane
  DiffPane --> DiffSection[DiffSection]
  DiffSection --> FileView[FileView]

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