[pierrevbc]

Problem

Once a text box or placeholder is in text editing, it can't be dragged: every press inside its
box, border included, places the caret or starts a text selection. A click on an unselected text
box or placeholder enters editing straight away (like PowerPoint), so moving a text box takes an
extra step: click outside, then drag it before the click turns into editing. In PowerPoint,
grabbing the border of a box being edited moves it, with the move cursor on hover.

Reproduce on main (0.6.0):

1. deckcraft --sample, click into the title of slide 1: the caret appears.
2. Press on the title's dashed border and drag: the caret moves or text gets selected; the title
   doesn't move. The cursor over the border is the text cursor.

Cause: Session::down (crates/engine/src/tools.rs) sends any press inside the edited box's
axis-aligned bounds, inflated by the hit tolerance, to the caret. Only the resize, rotate and
adjust handles are checked first. The canvas shows the text cursor over the whole box while
editing (crates/ui-egui/src/canvas.rs).

What changes

Two commits: the change, and the progress docs.

• Engine. New Hit::Frame { id }: hit_test returns it, after the handles of the selection,
  when the point lies in a band the hit tolerance wide on either side of the edge of the box being
  edited. The test runs in the shape's own frame (Xfrm::affine().inverse()), so it follows
  rotation and flips; in very small boxes the inner half of the band shrinks to a quarter of the
  box so text stays reachable. Lines (connectors with text) and locked shapes have no frame.
• Press on the frame (Session::down): leaves text editing, selects the box and starts the
  usual Drag::Move (smart guides, snapping, Shift to constrain, Alt to duplicate), committed as
  one undo step ("Move"). A click without a drag only selects the box, with no undo step, as in
  PowerPoint.
• Inside the box, caret and text selection are unchanged. The zone now follows the rotated
  box instead of its axis-aligned bounds, so a press in the corner area of a rotated box's bounds,
  off the box, no longer moves the caret.
• Canvas. Hit::Frame shows the move cursor, read from tool.hover like the other cursors;
  no geometry in the UI.
• Agents see {"hit": {"kind": "frame", "id": …}} from a down event (ui.pointer, MCP
  pointer), since the gesture goes through Session::pointer.
• Progress docs. docs/ui-parity.md gets a Direct manipulation row (status line, history);
  ROADMAP.md a progress log line. The checklist rows involved (Text boxes, In-place text editing)
  are already D, and no gaps.md entry covered this.

How it was tested

cargo xtask ci passes on this branch (fmt, clippy -D warnings, workspace tests, layers,
assets, wasm32 check).

New tests in crates/engine/src/tests.rs, on decks built in code:

• dragging_the_frame_of_edited_text_moves_the_box: hover on either side of the edge reports
  Hit::Frame, inside reports the text; press just outside the top edge and drag: the box moves
  by the drag, editing ends, one undo step that restores it; a click on the inner side of the band
  selects the box with no undo step.
• dragging_inside_edited_text_selects_text: the box doesn't move, the text is selected, no undo
  step.
• frame_of_rotated_edited_text_follows_the_rotation: 30° box, frame hit on the rotated edge,
  move keeps the rotation; inside still places the caret; a point in the axis-aligned bounds but
  off the box doesn't.
• resize_handles_beat_the_frame_of_edited_text: the SE handle, inside the band, still resizes.

Checked by hand in the app, on 0.5.0 (deckcraft --sample --control, real egui pointer events through
ui.click/ui.drag, ui.screenshot): the title dragged by its border while editing, move cursor
over the border.

Known limits

• While editing text, DeckCraft still hides the rotation handle (unchanged); PowerPoint shows it.
• A shape inside a group: unchanged (the frame belongs to the edited box; the group is not
  selected).

Related PRs

• The right-click PR ("Canvas: right click selects the shape under the pointer") is
  independent. Whichever lands second needs one adjustment: context_click should use
  edited_box/edit_zone for the edited-text test and list Hit::Frame among the hits that
  carry a shape id (the compiler flags the match). I will rebase the second one once the first
  lands. The adjustment is already written and tested in a local integration of both: a right
  click anywhere in the edit zone, frame and rotated boxes included, keeps the caret and the text
  menu.
• Equations on slides: laid out and edited in place with equaSHion #192 (equations edited in place) changes the same block of Session::down: it adds an equation
  check inside the caret branch this PR rewrites. Small textual conflict; the resolution is to keep
  the equation check at the top of the new branch.
• Slides: Ctrl+A in the slide pane selects every slide (#188) #191, Notes: speaker notes show their formatting and keep it when edited #168, Charts: GridCraft spreadsheet data editor and live editing for the first 5 chart types #195 add tests at the end of crates/engine/src/tests.rs: append-only conflict.
• Charts: GridCraft spreadsheet data editor and live editing for the first 5 chart types #195 and Visual equation editor: OMML equations, 2-D layout, in-place typing #55 also change crates/engine/src/tools.rs, without textual conflict.
• docs/ui-parity.md and ROADMAP.md (status line, progress log) conflict with other PRs that
  update them (Add Ukrainian interface translation and language selection #34, i18n: add Russian, Spanish, French, Portuguese and German interfaces #110, feat(theme): add System appearance across DeckCraft controls #134, Text: typing goes on after Tab in a text box (#78) #139, Export: animated GIF of the deck (Export… dialog, CLI, MCP) (#171) #177, Charts: GridCraft spreadsheet data editor and live editing for the first 5 chart types #195, Animation effects: follow the system's reduced-motion setting #196, i18n: add Polish (pl) interface #199); the resolution is to keep both lines.

[echelon]

Thank you for this contribution, @pierrevbc! It has landed on main and will ship in the next DeckCraft release.

If you haven't already, please come join us on Discord: https://discord.gg/artcraft