Cas/monaco diffs

[Cas Linden (CasLinden)]

Summary

Replace kibo ui codeblocks for diff display with monaco editor diffs, showing accurate file states and line numbers.
Adds scroll to hunk feature
Adds styles and configuration for monaco editor

Edit 05/05

• fix monaco editor state resets, for diffs and nix-editor
• use non-diff editor for one-version deleted or untracked files
• add color theme extracted from claude design tests
• remove edit button from deleted type diffs
• improved UX and styling in general

Test Plan

Make more changes in a file and go to the diff tab, open the diff.

Edit 05/05

• edited stories, added mocks and improved testability

Suite	Total	Pass	Fail	Skip	Δ
Vitest unit	10 files (75 tests)	9	1	—	unchanged
Vitest storybook	47 files (153 tests)	45	2	—	only rebuild-overlay-panel's Starting and Infinite Recursion Error, both develop-side)
Rust unit	38 modules	38	0	—	unchanged
Playwright E2E	2	2	0	—	unchanged
wdio	6 suites	4	2	—	unchanged (conversational + onboarding; not branch-related)

Docs

• No docs update needed

[github-actions]

	Warnings
⚠️	Please assign this PR to someone (usually yourself).
⚠️	❗ Big PR (2769 lines changed). Consider splitting it into smaller, focused changes.
⚠️	New TypeScript source files were added without any new tests: apps/native/src/components/widget/summaries/monaco-setup.ts apps/native/src/components/widget/summaries/monaco-theme.ts

📋 PR Overview

Lines changed	2769 (+1422 / -1347)
Files	20 added, 30 modified, 6 deleted
Draft / WIP	no
Has Test Plan	yes
New UI components	yes (6)
New Storybook stories	yes (6)
New Rust modules	no
New TS source files	yes (8)
New tests	no
package.json touched	yes
Cargo.toml touched	no
Infra / CI touched	no

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