feat(snapshot): move scope into presentation

[thymikee]

Summary

Move snapshot scope selection into the platform presentation boundary.

• keep iOS acquisition broad, apply scope and relative depth once in Swift presentation, and treat a missing scope as a healthy empty projection
• reuse fix(android): resolve snapshot scope once and disclose the API 23 occlusion-scan gap (#1832 C1/C2) #1846's Android presentation policy and pin Swift and TypeScript to the same golden table, including blank-scope normalization
• remove daemon and backend-specific iOS scope interpretation, then reindex selected subtrees before publication

Part of #1797.

Validation

• pnpm check:affected --run
• iOS runner build with unit tests enabled
• 3 targeted Swift scope tests on iOS Simulator
• 71 focused TypeScript scope and presentation tests
• non-vacuity mutations: disconnecting Swift scope presentation failed 8 assertions; label-only TypeScript and Swift matching failed identifier/value fixtures

[thymikee]

Exact bd59d47e is DIRTY and stale-stacked. Current main already contains #1850 eligibility and #1846 contribution-aware Android scope. This branch reintroduces raw-tree first-match scope in TypeScript and Swift, so a decorative first match later removed by eligibility can yield empty output despite a later contributing match.

Rebase, drop the merged eligibility commit, preserve the first-preorder-match-whose-presented-subtree-contributes contract, and add decorative-first/later-contributing parity plus production-boundary regressions.

The PR body is only stack boilerplate, full CI did not run, and the required live iOS tree/private-AX plus Android evidence is absent.

[github-actions]

Size Report

Metric	Base	Current	Diff
JS raw	2.31 MB	2.31 MB	+554 B
JS gzip	759.2 kB	759.3 kB	+99 B
npm tarball	882.5 kB	883.3 kB	+793 B
npm unpacked	3.08 MB	3.08 MB	+3.6 kB

Startup median (7 runs, lower is better):

Scenario	Base	Current	Diff
CLI --version	30.0 ms	29.6 ms	-0.4 ms
CLI --help	72.7 ms	70.4 ms	-2.4 ms

Top changed chunks:

Chunk	Raw diff	Gzip diff
dist/src/internal/daemon.js	-267 B	-98 B
dist/src/snapshot.js	+5 B	+14 B
dist/src/session2.js	0 B	-2 B
dist/src/sdk-batch-runner.js	-17 B	0 B

[thymikee]

Re-reviewed exact 8b1c8130: the rebase/stack issue is fixed, and current-main eligibility plus Android’s contribution-aware scope policy are preserved.

P1 remains on Swift: applyScope selects the first raw semantic match before presentedNodes applies eligibility. A decorative first match whose subtree contributes nothing can therefore produce an empty projection and suppress a later contributing match, contrary to the shared contract and Android implementation. Make Swift selection contribution-aware, then add decorative-first/later-contributing and dropped-container/contributing-child parity plus production-route regressions.

Coverage is red only from inherited #1860 ratchet drift. The body also still needs the required 24-file scope disclosure and specific live private-AX production evidence.