v0.1.2: app controls on the GitHub container, and the ring sheds its placeholders

[ThyFriendlyFox]

What & why

Two things, cut as v0.1.2:

The GitHub container grows the app's own controls, shown once signed in — it is the one container about the app rather than the workspace, which is why they live there:

• dark — the canvas turns dark gray, the ascii logo renders in near-dark tints of the same two hues (slightly lighter than the dark canvas, the way the light set is slightly darker than white), and canvas-facing chrome — ring dots, lesson labels — flips to white. One AppSettings.shared owns the reading (canvasColor / canvasChrome), UserDefaults-backed, same one-object pattern as GitHubAuth.shared. The containers themselves were already black in both themes.
• feedback — opens mail to team@reagent-systems.com.
• follow @Reagent_Systems — opens x.com/Reagent_Systems.
• rerun onboarding — a fresh lesson ring arrives beside the current one and the strip travels to it. Beside rather than instead: the user's rings are their workspaces, and a tutorial must not cost them one. Graduation already retires it (edge-swiping away removes an onboarding ring), same as the first run.

The numbered placeholder containers (kinds 6–15) are retired. The catalog is now the five real containers — which is what Android's deck already ships, so this is iOS catching up. A persisted strip that still carries a placeholder culls it at restore: the reserve drops them, a lane holding one pulls its replacement from the reserve, and a lane with nothing to show collapses. The 15-color palette went with them.

Release mechanics: versions to 0.1.2 (Android versionCode 3), changelog cut. After merge: git tag v0.1.2 && git push origin v0.1.2 publishes the release with artifacts.

Gesture-law impact

None — no input handling changed. The onboarding rerun reuses the existing ring machinery (insert + graduation); the settings are taps on buttons.

Verified — function and feel

• Restore cull, on a real stale snapshot: the simulator carried a persisted strip from before the cut, placeholders included. It restores clean — advancing from the terminal lands on GitHub, not on "6".

• Dark canvas end to end via its UserDefaults key: dark-gray backdrop, dark logo tints, white ring dots. Light theme unchanged.

• Onboarding ring still mints (the rerun request calls the same factory first launch uses).

• iOS + Android builds green.

• Builds clean (xcodegen generate re-run — new file AppSettings.swift)

• Feel-tested on a real device — owner: the signed-in rows themselves. The signed-in phase needs a Keychain token the simulator doesn't have, so the four controls were verified by construction, not on screen. On your phone: toggle dark (canvas + logo + dots flip live), feedback (Mail prefilled), follow (x.com), rerun onboarding (lesson ring arrives beside, retires on edge-swipe away).

• Screenshots exercised in-session (light + dark canvas, cull landing on GitHub)

• Docs updated: CHANGELOG.md carries 0.1.2

• No diagnostics or demo scaffolding left in the merge

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