fix(spf): fix async teardown leaks and recreate engine on src change

[cjpillsbury]

Audit of playback engine orchestrations found several async tasks that could continue running (and mutating DOM/state) after destroy() was called.

Fix teardown leaks:

• setupMediaSource: abort waitForSourceOpen via AbortController on destroy
• updateDuration: skip mediaSource.duration mutation if destroyed after await
• endOfStream: skip runEvaluate if destroyed (guards mediaSource.endOfStream)
• loadTextTrackCues: abort in-flight VTT fetch on cleanup (controller already existed but wasn't called from the returned cleanup function)

Recreate engine on src change:

• SpfMedia.src setter now destroys the current engine and creates a fresh one instead of patching presentation on the existing engine. This ensures all state, SourceBuffers, and in-flight requests from the previous source are fully torn down before the next source begins loading — matching the browser's own load algorithm semantics. The media element reference is preserved and re-applied to the new engine automatically.

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📦 Bundle Size Report

🎨 @videojs/html

(no changes)

Presets (7)

Entry	Size
/video (default)	22.95 kB
/video (default + hls)	153.33 kB
/video (minimal)	22.81 kB
/video (minimal + hls)	153.26 kB
/audio (default)	21.17 kB
/audio (minimal)	21.15 kB
/background	6.36 kB

Media (4)

Entry	Size
/media/background-video	652 B
/media/container	1.86 kB
/media/hls-video	131.32 kB
/media/simple-hls-video	11.57 kB

Players (3)

Entry	Size
/video/player	6.22 kB
/audio/player	6.21 kB
/background/player	6.21 kB

Skins (14)

Entry	Type	Size
/video/minimal-skin.css	css	2.74 kB
/video/skin.css	css	2.79 kB
/video/minimal-skin	js	22.23 kB
/video/minimal-skin.tailwind	js	21.48 kB
/video/skin	js	22.40 kB
/video/skin.tailwind	js	21.52 kB
/audio/minimal-skin.css	css	2.17 kB
/audio/skin.css	css	2.19 kB
/audio/minimal-skin	js	20.58 kB
/audio/minimal-skin.tailwind	js	19.71 kB
/audio/skin	js	20.62 kB
/audio/skin.tailwind	js	19.89 kB
/background/skin.css	css	124 B
/background/skin	js	1009 B

UI Components (21)

Entry	Size
/ui/alert-dialog	2.05 kB
/ui/alert-dialog-close	1.22 kB
/ui/alert-dialog-description	1.16 kB
/ui/alert-dialog-title	1.17 kB
/ui/buffering-indicator	1.71 kB
/ui/captions-button	1.82 kB
/ui/controls	1.79 kB
/ui/fullscreen-button	1.77 kB
/ui/mute-button	1.79 kB
/ui/pip-button	1.77 kB
/ui/play-button	1.77 kB
/ui/playback-rate-button	1.80 kB
/ui/popover	3.06 kB
/ui/poster	1.66 kB
/ui/seek-button	1.81 kB
/ui/slider	2.22 kB
/ui/thumbnail	2.08 kB
/ui/time	1.85 kB
/ui/time-slider	2.92 kB
/ui/tooltip	2.42 kB
/ui/volume-slider	2.19 kB

Sizes are marginal over the root entry point.

⚛️ @videojs/react

(no changes)

Presets (7)

Entry	Size
/video (default)	16.68 kB
/video (default + hls)	147.49 kB
/video (minimal)	16.72 kB
/video (minimal + hls)	147.54 kB
/audio (default)	14.39 kB
/audio (minimal)	14.41 kB
/background	3.14 kB

Media (3)

Entry	Size
/media/background-video	539 B
/media/hls-video	131.60 kB
/media/simple-hls-video	11.95 kB

Skins (14)

Entry	Type	Size
/video/minimal-skin.css	css	2.74 kB
/video/skin.css	css	2.79 kB
/video/minimal-skin	js	16.61 kB
/video/minimal-skin.tailwind	js	19.14 kB
/video/skin	js	16.57 kB
/video/skin.tailwind	js	19.16 kB
/audio/minimal-skin.css	css	2.17 kB
/audio/skin.css	css	2.19 kB
/audio/minimal-skin	js	14.34 kB
/audio/minimal-skin.tailwind	js	16.13 kB
/audio/skin	js	14.27 kB
/audio/skin.tailwind	js	16.32 kB
/background/skin.css	css	90 B
/background/skin	js	272 B

UI Components (17)

Entry	Size
/ui/alert-dialog	2.70 kB
/ui/buffering-indicator	2.20 kB
/ui/captions-button	2.26 kB
/ui/controls	2.19 kB
/ui/fullscreen-button	2.28 kB
/ui/mute-button	2.23 kB
/ui/pip-button	2.26 kB
/ui/play-button	2.25 kB
/ui/playback-rate-button	2.24 kB
/ui/popover	3.10 kB
/ui/poster	2.05 kB
/ui/seek-button	2.25 kB
/ui/slider	3.09 kB
/ui/time	2.36 kB
/ui/time-slider	3.24 kB
/ui/tooltip	3.20 kB
/ui/volume-slider	3.08 kB

Sizes are marginal over the root entry point.

🧩 @videojs/core

(no changes)

Entries (5)

Entry	Size
.	4.78 kB
/dom	8.02 kB
/dom/media/custom-media-element	1.77 kB
/dom/media/hls	131.18 kB
/dom/media/simple-hls	11.48 kB

🏷️ @videojs/element

(no changes)

Entries (2)

Entry	Size
.	999 B
/context	936 B

📦 @videojs/store

(no changes)

Entries (3)

Entry	Size
.	1.32 kB
/html	700 B
/react	360 B

🔧 @videojs/utils

(no changes)

Entries (10)

Entry	Size
/array	104 B
/dom	1003 B
/events	227 B
/function	261 B
/object	119 B
/predicate	265 B
/string	148 B
/style	190 B
/time	478 B
/number	158 B

📦 @videojs/spf

(no changes)

Entries (3)

Entry	Size
.	40 B
/dom	9.69 kB
/playback-engine	9.56 kB

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Icon	Meaning
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🔺	Increased ≤ 10%
🔴	Increased > 10%
🔽	Decreased
🆕	New (no baseline)

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