fix(ui): dedupe controlled launcher dock tiles

[lalalune]

Follow-up to #10800 / #9144.

Summary

• Filters the final launcher page list against the rendered dock set, so controlled favoriteIds from desktop-tab pins do not duplicate as page tiles.
• Extends the controlled-favorites component test to assert the 4-tile dock cap and that docked ids are absent from the page grid while non-docked ids remain.

Evidence

bunx biome check packages/ui/src/components/pages/Launcher.tsx packages/ui/src/components/pages/Launcher.test.tsx
bun run --cwd packages/ui test -- src/components/pages/Launcher.test.tsx src/state/launcher-layout.test.ts src/state/launcher-layout.property.test.ts --coverage.enabled=false
bun run --cwd packages/ui typecheck
bun install

Results:

• Biome: clean.
• Focused tests: 49 passed.
• packages/ui typecheck: passed.
• bun install: completed with no tracked changes.

Repo-wide verify note: #10800 already documents the current upstream audit:type-safety-ratchet baseline failure on develop; this follow-up only touches the launcher UI component/test and was validated with the focused gates above.

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• Commit unit tests in branch fix/9144-controlled-dock-dedupe

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