* feat(player): slideshow controller state machine
Stack-split from the original ss-player PR (#1581): the SlideshowController
state machine (stack-based slide/fragment/branch navigation) and its tests.
The <hyperframes-slideshow> web component follows in the next PR.
* feat(player): <hyperframes-slideshow> web component + presenter
Stack-split from the original ss-player PR (#1581): the <hyperframes-slideshow>
custom element (wraps <hyperframes-player>, drives the controller),
presenter/audience BroadcastChannel sync, nav chrome, and the player scenes hook.
* feat(studio): slideshow manifest persistence + panel helpers
Stack-split from the original ss-studio PR (#1582): the data layer —
setSlideshowManifest, the useSlideshowPersist hook, and panel helpers.
The editor panel UI follows in the next PR.
* feat(studio): slideshow branching editor panel UI
Stack-split from the original ss-studio PR (#1582): the SlideshowPanel /
SlideshowSubPanels editor UI, right-panel wiring, and app integration.
* docs(skill): slideshow authoring guidance + standalone harness reference
New /slideshow skill (island schema, slide rules, fragments, branching,
validation) + a standalone-harness reference doc, and a router entry in
the /hyperframes skill.
Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>
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Co-authored-by: Claude Opus 4.8 (1M context) <noreply@anthropic.com>
