Merge #660: M5: one presentation tab per page of a file (@JimKnoxx)

# Conflicts:
#	docs/prototyping-parity.md

docs/prototyping-parity.md

@@ -1,6 +1,6 @@
 # Prototyping parity
 
-> **Last reviewed:** 2026-10-11 · **Last updated:** 2026-10-22 · **Change:** minor (Change to, set variable and set variable mode lay out what they change in the player, as the canvas does) · **Target:** Figma Design (desktop app 126.10.7)
+> **Last reviewed:** 2026-10-11 · **Last updated:** 2026-10-17 · **Change:** minor (Change to, set variable and set variable mode lay out what they change in the player, as the canvas does; presentation tabs, one per page of a file; a Present tab with device and scale controls (#537); core editor leftovers: delays on mouse triggers and manual overlay offsets; controller buttons on key/gamepad triggers, widgets that react in prototypes, `proto.evaluate` and the mode lookup rules pinned) · **Target:** Figma Design (desktop app 126.10.7)
 
 **Breadth ~92%, ready ~74% (estimated).** Every Figma trigger except media, every action except
 media control, every transition and easing exist; key/gamepad triggers take controller buttons,
@@ -54,6 +54,7 @@ case pins the current behaviour).
 | Open link | pass | always a new tab or browser window (opening in place would leave the prototype) |
 | Change to: another variant of the instance, in place, with the interaction's animation | pass | `interactive_components_change_in_place` |
 | Interactive components: every instance plays the interactions of the variant it shows; an interaction on the instance with the same trigger wins | **fixed** | instances played only interactions copied onto them when they were placed: an instance placed before its main got interactions did nothing, and one placed after kept the first variant's interactions after changing (a toggle went on but never off). New instances no longer copy them, and copies in older files give way to the variant shown; `instances_play_their_variants_interactions` |
+| Presentation tabs: one per page of a file, named "file - page" (renames follow). Play on a page that has a tab shows it as it was (from another start frame it starts again). Tabs keep their own copy of the prototype and play on after their file closes; a saved file opened again gets its tabs back. A tab never changes a file that isn't in front. Its X or Escape ends it and goes back to its file, or Home | **fixed** | one "Present" tab: a second presentation replaced the first, Play restarted it, and closing the file ended it; `present_tab_tests` |
 | Change to on a layer inside a nested instance changes the instance whose variant set holds the destination | **fixed** | the innermost instance (an icon inside a button) was changed instead |
 | Set variable, set variable mode, conditional | pass | `proto_run_tests`, `proto_conditional_tests`, `present_variables_tests` |
 | Change to, set variable and set variable mode lay out what they change as the canvas does: text sizes to what it shows, hugging frames around it | **fixed** | the player didn't lay out after them: an instance with a longer label changed to the main's width, and a bound text kept its old size; `change_to_lays_out_the_instance_around_its_own_content`, `set_variable_and_set_mode_lay_out_the_text_they_change` |
@@ -103,6 +104,7 @@ case pins the current behaviour).
 |---|---|---|
 | 2026-10-23 | patch | A top-level frame taller (or wider) than the device's screen scrolls with no overflow setting, as Figma's documentation says; before, "No scrolling" frames such as the landing page template's Phone frame only clipped. Content past a frame's own edges still scrolls only as its overflow allows. Checked in the app on macOS. Numbers unchanged |
 | 2026-10-22 | minor | Change to, set variable and set variable mode lay out what they change in the player as the canvas does: text sizes to what it shows and hugging frames follow (an instance with a longer label changed to the main's width; a bound text kept its old size). Two player tests. Breadth and ready unchanged. |
+| 2026-10-17 | minor | Presentation tabs: one per page of a file instead of a single "Present" tab, named "file - page" (renames follow); Play shows a page's tab as it was; tabs outlive their file and come back when a saved file opens again. Numbers unchanged. |
 | 2026-10-17 | minor | Community batch #753: a Present tab (#537): playback in its own tab that keeps its screen and history, a current-frame thumbnail, previous / next, device presets and scale; the frame reflows to the device's screen on the prototype's copy; phone and tablet content drags inside a fixed device as its overflow allows ("No scrolling" frames clip; iPad mini, MacBook Air and Desktop keep their bodies); the unsaved-changes question shows above the presentation. Checked in the app on Windows. Percentages and hours unchanged |
 | 2026-10-13 | minor | Prototyping, delays on mouse triggers and manual overlay offsets (M5): mouse enter, leave, down and up wait `delayMs` before their actions run (once while waiting; dropped when the screen or overlay they were on goes away; a pointer that leaves early doesn't cancel, the documentation is silent), and a manual overlay sits at `offset: [x, y]` from the top-left of the layer that opens it (without one, right below it, as before). Delay and X/Y fields in the interaction editor, the player on its own clock, REST import (`delay`, `overlayRelativePosition`), `.fig` import and export (the export's field for mouse delays is unchecked against other software). Numbers unchanged. |
 | 2026-10-12 | minor | Controller buttons on key/gamepad triggers (Controller menu, player polling on Windows and in the browser, REST import instead of skipping, control channel injection), widgets reacting to clicks in presented prototypes on the prototype's own copy, `proto.evaluate`; the mode lookup and set-variable-mode rules written as cases (they already held). Breadth 90% → 92%, ready unchanged at 74% (controllers on Windows and the browser only; no real prototype QA yet), 3–6 h → 2–5 h |