fix: apply clippy fixes

[devin-ai-integration]

Summary

Ran cargo clippy --fix and manually applied remaining suggestions. Changes across 6 files:

• Cargo.toml: Exclude plugins/apple-contact and plugins/pdf from workspace — these directories exist but have no Cargo.toml (only node_modules), breaking the plugins/* glob
• speakers.rs: Simplify boolean expression (nonminimal_bool): !word.is_final && !(a && b) → !(word.is_final || a && b) via De Morgan's law
• batch.rs, label.rs, collect.rs, speakers.rs: Collapse nested if/if let blocks into let-chains (collapsible_if)
• soniox/live.rs: Remove unnecessary explicit lifetime annotation (needless_lifetimes)

Followed up with dprint fmt to satisfy the fmt CI check.

Review & Testing Checklist for Human

• Verify the boolean simplification in speakers.rs:132 is logically equivalent — !x && !(a && b) should equal !(x || a && b) by De Morgan's law, relying on && binding tighter than ||
• Spot-check that let-chain rewrites in speakers.rs (lines 121-140) preserve the original control flow, especially the fallthrough paths when conditions are false
• In remember_identity (speakers.rs:166-170), the collapsed && let Some(human_id) = identity.human_id.clone() is guarded by identity.human_id.is_some() — confirm this is always redundant and safe to flatten
• Confirm plugins/apple-contact and plugins/pdf genuinely have no Rust code that should be compiled (they only contain node_modules/)

Notes

• All changes are mechanical clippy suggestions — no behavioral logic was intentionally altered.
• CI failures in check (ubuntu/windows/macos), desktop_ci (linux-*), and downstream ci are pre-existing cli crate build errors (could not find 'process' in 'tokio') unrelated to this PR. The fmt check passes, and desktop_ci (macos) passes.
• Could not fully build on Linux: external crate libspa has a version mismatch with the system libpipewire-0.3, and macOS-only crates (objc2_app_kit, etc.) can't compile. This means the tools crate and macOS-specific crates were not linted. All other workspace crates were checked with zero remaining clippy warnings.

Link to Devin session: https://app.devin.ai/sessions/0c461d1399df4743963df3efc478e350

[devin-ai-integration]

🤖 Devin AI Engineer

I'll be helping with this pull request! Here's what you should know:

✅ I will automatically:

• Address comments on this PR that start with 'DevinAI' or '@devin'.
• Look at CI failures and help fix them

Note: I can only respond to comments from users who have write access to this repository.

⚙️ Control Options:

• Disable automatic comment and CI monitoring

[netlify]

✅ Deploy Preview for hyprnote-storybook canceled.

Name	Link
🔨 Latest commit	c33d338
🔍 Latest deploy log	https://app.netlify.com/projects/hyprnote-storybook/deploys/69bde7771ab3d800089a0ba4

[netlify]

✅ Deploy Preview for hyprnote canceled.

Name	Link
🔨 Latest commit	c33d338
🔍 Latest deploy log	https://app.netlify.com/projects/hyprnote/deploys/69bde7772923be00080e5deb