feat(code-block): Do not copy diff markers

[s1gr1d]

DESCRIBE YOUR PR

Code blocks can contain diff markers (+ or -) at the beginning of code blocks which get copied as well when copying the code.

This modifies the function for copying code on click and adds an effect to handle copy-events initiated manually (not by clicking "copy code".

closes #12802

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PRE-MERGE CHECKLIST

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• Checked Vercel preview for correctness, including links
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• PR was reviewed and approved by a member of the Sentry docs team

[vercel]

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Name	Status	Preview	Comments	Updated (UTC)
develop-docs	✅ Ready (Inspect)	Visit Preview	💬 Add feedback	Mar 4, 2025 0:16am
sentry-docs	✅ Ready (Inspect)	Visit Preview	💬 Add feedback	Mar 4, 2025 0:16am

1 Skipped Deployment

Name	Status	Preview	Comments	Updated (UTC)
changelog	⬜️ Ignored (Inspect)			Mar 4, 2025 0:16am

[codecov]

Bundle Report

Changes will increase total bundle size by 2.19kB (0.01%) ⬆️. This is within the configured threshold ✅

Detailed changes

Bundle name	Size	Change
sentry-docs-server-cjs	10.2MB	1.23kB (0.01%) ⬆️
sentry-docs-client-array-push	9.39MB	959 bytes (0.01%) ⬆️

Affected Assets, Files, and Routes:

view changes for bundle: sentry-docs-server-cjs

Assets Changed:

Asset Name	Size Change	Total Size	Change (%)
1729.js	-3 bytes	1.46MB	-0.0%
../instrumentation.js	-3 bytes	791.26kB	-0.0%
9523.js	-3 bytes	767.46kB	-0.0%
../app/[[...path]]/page.js	1.24kB	531.96kB	0.23%

Files in ../app/[[...path]]/page.js:

• ./src/components/codeBlock/index.tsx → Total Size: 5.18kB

• ./src/components/codeBlock/index.tsx → Total Size: 1.3kB

App Routes Affected:

App Route	Size Change	Total Size	Change (%)
/[[...path]]	1.24kB	3.08MB	0.04%

view changes for bundle: sentry-docs-client-array-push

Assets Changed:

Asset Name	Size Change	Total Size	Change (%)
static/chunks/pages/_app-*.js	-3 bytes	868.04kB	-0.0%
static/chunks/4028-*.js	-3 bytes	393.29kB	-0.0%
static/chunks/app/[[...path]]/page-*.js	965 bytes	73.98kB	1.32%
server/middleware-*.js	-5.55kB	1.0kB	-84.74%
server/middleware-*.js	5.55kB	6.55kB	555.3% ⚠️
static/5UR29uqX1JDZYalKVaOFX/_buildManifest.js (New)	578 bytes	578 bytes	100.0% 🚀
static/5UR29uqX1JDZYalKVaOFX/_ssgManifest.js (New)	77 bytes	77 bytes	100.0% 🚀
static/k8ujUP5XL1aiDc36MO9J-*.js (Deleted)	-578 bytes	0 bytes	-100.0% 🗑️
static/k8ujUP5XL1aiDc36MO9J-*.js (Deleted)	-77 bytes	0 bytes	-100.0% 🗑️

Files in static/chunks/app/[[...path]]/page-*.js:

• ./src/components/codeBlock/index.tsx → Total Size: 5.74kB

[chargome]

Generally looks good! You can add some small unit tests just for the effect functionality if you want – in case something with our diff block logic changes in the future

[chargome]

thanks for adding the tests 🙏