Settings: show untracked settings copy

[cursor]

Summary

• Change the system defaults badge/popover copy to N untracked setting(s).
• Replace the custom defaults warning treatment with a settings icon and neutral blue tone in the filesystem untracked card.
• Update E2E text matchers and Storybook snapshots for the new copy.

Fixes ENG-524

Test Plan

• bun -F native test:unit -- system-defaults-cta.test.tsx
• bun -F native test:storybook -- untracked-card seed-prompt file-list
• bun -F native lint
• bun -F native build

Docs

• Docs updated (companion PR in darkmatter/nixmac-web: #___)
• No docs update needed

  

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[github-actions]

	Warnings
⚠️	PR is marked WIP / draft — do not merge until ready for review.
⚠️	Please assign this PR to someone (usually yourself).

📋 PR Overview

Lines changed	180 (+154 / -26)
Files	1 added, 10 modified, 0 deleted
Draft / WIP	yes
Has Test Plan	yes
New UI components	no
New Storybook stories	no
New Rust modules	no
New TS source files	no
New tests	yes (1)
package.json touched	no
Cargo.toml touched	no
Infra / CI touched	no

🔬 Coverage

Report	Lines	Statements	Functions	Branches
apps/native/coverage/coverage-summary.json	18.7%	18.7%	31.4%	54.9%

Generated by 🚫 dangerJS against b5fb931

[github-actions]

	Warnings
⚠️	PR is marked WIP / draft — do not merge until ready for review.
⚠️	Please assign this PR to someone (usually yourself).

📋 PR Overview

Lines changed	180 (+154 / -26)
Files	1 added, 10 modified, 0 deleted
Draft / WIP	yes
Has Test Plan	yes
New UI components	no
New Storybook stories	no
New Rust modules	no
New TS source files	no
New tests	yes (1)
package.json touched	no
Cargo.toml touched	no
Infra / CI touched	no

🔬 Coverage

Report	Lines	Statements	Functions	Branches
apps/native/coverage/coverage-summary.json	18.7%	18.7%	31.4%	54.9%

Generated by 🚫 dangerJS against b5fb931