v4.9.3 — the full-review fixes

Just bug fixes, from a full review of the fast 4.9.x releases. Update from the Pinokio sidebar — no new downloads.

What you'll notice

• Storyboard works on Macs that cap at 768 (24 GB). A new film was being planned at 1024×576 — a size those Macs can't deliver — so Render was disabled from the first click, and the "Use 1024×576" button offered the same illegal size. Films are now planned at the size your Mac delivers, the button offers the real one, the Quality section is visible at Pinokio's window width, and dropdowns no longer flicker shut. (#71 — thanks @Sebartus)
• Renaming a character works again. It failed every time since 4.9.0.
• A freshly trained character clicked "Use in video" actually rides on the render. The chip appeared but the LoRA was never sent.
• Image Studio on 8 GB and 24 GB Macs: engines that can't fit are listed with "needs a 32 GB Mac" and the Studio picks one that fits, instead of refusing at the last second with a developer flag.
• High quality / Keyframes / Extend without the Q8 pack now point you to Settings → Models instead of showing a terminal command.
• Image mode with no image is stopped at the button instead of failing after queueing.
• Header: the memory readout no longer gets clipped at narrower windows.
• Update builds the half-memory H3 engine on older installs. The H3 code checkout is moved to its pinned branch first; before, the build step failed with "quantize_stream.py missing" on installs made before the v2 engine. (#74 — diagnosed by @blackest)
• Update path: the in-app "Update now" no longer skips the dependency script when only that script changed, its self-repair covers all three render packages, and a running panel keeps serving the files it booted with until you restart.
• Analytics: failures caused by missing weights or a full disk stop being filed under "helper exited"; a stuck partial download stops retrying on every render.

Also in: a build check that fails on any button whose function no longer exists (the other half of the 4.9.0 dead-button bug).