Customisation Sync, not Hidden File Sync, for the tablet's interface

[mathewcsims]

Follow-up to #82 and #83. Both compose.yaml and SETUP.md named Hidden File Sync as the way the stripped-back interface reaches the Android tablet. Not false — it does cover .obsidian/ — but it points at the wrong one of LiveSync's two overlapping features for this setup.

Why it matters

Upstream is explicit that the two are not to be mixed:

"Hidden File Sync is a separate feature with different setup, selection, and conflict behaviour; do not use both features to manage the same files."

They resolve conflicts differently, so running both over the same content is a way to lose settings — which makes "which one" a real decision rather than a naming detail.

Why Customisation Sync

	Hidden File Sync	Customisation Sync
What it does	Syncs files under .obsidian/ as files	Syncs plugins, themes, snippets and config, per device
Device model	Same content everywhere	Named devices; choose whose config applies where
Right here	No	Yes

The device model is the whole argument. Two Macs and a tablet are not three copies of one machine: the tablet shouldn't be loading desktop-only plugins, and Hidden File Sync mirrors .obsidian/ wholesale with no lever for that. Customisation Sync pins state to a named device and applies it deliberately — also upstream's own recommendation for getting a desktop plugin setup onto mobile.

Also captured

• Name devices before applying anything, or you can't tell whose config you're pushing.
• Ordering constraint: enable only once plain note sync works on all three devices. Upstream's rebuild/fetch operations deliberately leave these off. Turning it on during setup gives you a sync problem and a config problem simultaneously, with no way to tell them apart.

Not verified

Neither feature has been run on this instance, and upstream's docs/hidden_file_sync.md is a 404 — this comes from docs/settings.md and the maintainer's discussion threads. Flagged inline in SETUP.md rather than presented as tested.

Comments and docs only; compose.yaml re-checked with podman compose config. No behaviour change.

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