Apply cargo clippy fixes and normalize dprint formatting

[devin-ai-integration]

Summary

Originally ran cargo clippy --fix followed by cargo fmt across the workspace. After merging origin/main to resolve conflicts, the files that contained clippy fixes (crates/analytics/src/posthog.rs, plugins/listener/src/actors/recorder.rs, migration files) were deleted or reorganized on main — so the remaining diff is formatting-only.

Changes in final diff

1. crates/audio-device/src/windows.rs: Import reordering to match dprint conventions (alphabetical, windows::core placement, Com:: import order)
2. crates/audio-device/src/macos.rs: Tuple field access spacing (device.0.0 → device.0 .0 per rustfmt rules), if/else block expansion
3. plugins/fs2/src/error.rs: Import reordering (serde::{Serialize, ser::Serializer} → serde::{ser::Serializer, Serialize})

Updates since last revision

• Fixed dprint formatting issues flagged by CI in windows.rs, macos.rs, and error.rs.
• Note: CI errors in apps/cli/ (tokio::process resolution failures) are pre-existing on main and unrelated to this PR.

Review & Testing Checklist for Human

• Verify the diff is formatting-only: The cumulative diff should contain no semantic changes. If any clippy fixes survived the merge, verify their correctness (especially let-chain collapses in migration files).
• Confirm dprint CI passes: The fmt check should now be green. If not, run dprint fmt locally to identify remaining discrepancies between cargo fmt and dprint formatting rules.
• Consider closing if no meaningful changes remain: Since the original clippy fixes were all in files that were deleted on main, this PR may have no substantive value beyond minor import reordering. Evaluate whether it's worth merging.

Recommended test plan: Verify CI fmt check passes. No functional testing needed — changes are purely cosmetic.

Notes

• Platform-specific crates (tcc, am2, notch, tauri-nspanel, libspa/tools) could not be checked on Linux due to missing macOS/system dependencies.
• The apps/cli/ CI failures (missing tokio::process feature) exist on main and are not introduced by this PR.

Link to Devin session: https://app.devin.ai/sessions/0814c7dbcbcc47728b0c2272f8f9483d

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[devin-ai-integration]

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