Add tool mode state

[deanblackborough]

• Add tool mode state
• Added tool palette to the top right of the viewport
• Recreated PR due to a AI slop trying to review the PR

Summary by CodeRabbit

Release Notes

• New Features

  • Added explicit Select and Move tool buttons to the editor interface, providing clearer control over object interaction behaviour.
  • Select tool enables object selection and handle-based manipulation; Move tool enables direct body dragging for movable objects.
  • Updated editor help documentation to describe tool-switching and interaction rules for each tool.

• Improvements

  • Tool state no longer persists in saved scene files and resets to Select mode on scene load.

[coderabbitai]

Caution

Review failed

The pull request is closed.

ℹ️ Recent review info

⚙️ Run configuration

Configuration used: Organization UI

Review profile: ASSERTIVE

Plan: Pro

Run ID: 0e230b04-7e04-4383-a31a-91da48caec68

📥 Commits

Reviewing files that changed from the base of the PR and between b9f7086 and a9e3b4d.

⛔ Files ignored due to path filters (3)

• assets/repo/artillery.png is excluded by !**/*.png
• assets/repo/platformer.png is excluded by !**/*.png
• assets/repo/simple-shooter.png is excluded by !**/*.png

📒 Files selected for processing (15)

• DECISIONS.md
• NOTES.md
• src/prune/editor/editor_tool.hpp
• src/prune/scene/artillery/artillery_scene.cpp
• src/prune/scene/platformer/platformer_scene.cpp
• src/prune/scene/scene.hpp
• src/prune/scene/scene_interaction.cpp
• src/prune/scene/scene_interaction.hpp
• src/prune/scene/scene_state.hpp
• src/prune/scene/simple_shooter/simple_shooter_scene.cpp
• src/prune/scene/world_scene.cpp
• src/prune/scene/world_scene.hpp
• src/prune/tooling/controls.cpp
• src/prune/tooling/editor_layout.cpp
• src/prune/tooling/ui.cpp

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📝 Walkthrough

Walkthrough

This PR introduces an explicit editor tool mode system with Select and Move as the initial tools. A new EditorTool enum is defined in editor_tool.hpp with two constexpr helper functions. SceneState gains a defaulted editor_tool member. The Scene base class acquires virtual methods for tool access and a execute_scene_creation_action hook. WorldScene implements these, replacing the old draw_creation_tools with a programmatic action-dispatch method. All three concrete scenes reset the tool to Select on runtime reset and mark player objects as editor-movable. SceneInteraction now dispatches drag-start selection through a new tool-aware path. Ui::draw_scene_viewport gains an in-viewport tool palette rendered as an overlay, suppressing viewport hover when the mouse is above it.

Estimated code review effort

🎯 4 (Complex) | ⏱️ ~50 minutes

Possibly related PRs

• deanblackborough/Prune#78: Both PRs modify src/prune/scene/scene_interaction.cpp to change drag initiation — this PR gates drag selection via the new Move-tool body-move logic including group-drag, while #78 adds multi-selection move/delete support.
• deanblackborough/Prune#25: Both PRs modify the Ui::draw_scene_viewport rendering flow, viewport hover/input routing, and panel sizing, with this PR's tool-palette overlay building directly on that foundation.
• deanblackborough/Prune#55: This PR extends DECISIONS.md with the new editor tool mode decision section, directly building on the file introduced in #55.

Suggested labels

enhancement

✨ Finishing Touches

📝 Generate docstrings

• Create stacked PR
• Commit on current branch

🧪 Generate unit tests (beta)

• Create PR with unit tests
• Commit unit tests in branch add-tool-mode-state

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