Improve DSN dropdown UX and clipboard tooltip to show exact project

[sfanahata]

DESCRIBE YOUR PR
This PR enhances the user experience for interacting with DSN (Data Source Name) snippets in code examples, addressing the suggestions in %2313015.

Key changes include:

• Enhanced Clipboard Messages: The "Copied" message now displays "Copied for [project name]" to provide clear context.
• Improved DSN Interactivity: DSN values in code blocks now feature enhanced tooltips ("Current project: [name]. Click to select a different project.") and visual indicators (dotted underline, dropdown arrow) to make their interactive nature more obvious.
• Automatic DSN Comments: A remark plugin has been added to automatically insert helpful comments above DSN patterns in code blocks, guiding users on how to interact with them.

This PR also includes fixes for local development environment issues encountered during implementation, ensuring the project builds and runs correctly.

%23%23 IS YOUR CHANGE URGENT%3F

Help us prioritize incoming PRs by letting us know when the change needs to go live.

• Urgent deadline (GA date, etc.):
• Other deadline:
• None: Not urgent, can wait up to 1 week

%23%23 SLA

• Teamwork makes the dream work, so please add a reviewer to your PRs.
• Please give the docs team up to 1 week to review your PR unless you've added an urgent due date to it.
  Thanks in advance for your help!

%23%23 PRE-MERGE CHECKLIST

Make sure you've checked the following before merging your changes:

• Checked Vercel preview for correctness, including links
• PR was reviewed and approved by any necessary SMEs (subject matter experts)
• PR was reviewed and approved by a member of the Sentry docs team

[vercel]

The latest updates on your projects. Learn more about Vercel for Git ↗︎

Name	Status	Preview	Comments	Updated (UTC)
develop-docs	✅ Ready (Inspect)	Visit Preview	💬 Add feedback	Jul 2, 2025 8:12pm
sentry-docs	❌ Failed (Inspect)			Jul 2, 2025 8:12pm

[codecov]

Bundle Report

Changes will increase total bundle size by 866.03kB (4.1%) ⬆️. This is within the configured threshold ✅

Detailed changes

Bundle name	Size	Change
sentry-docs-server-cjs	11.8MB	865.07kB (7.91%) ⬆️
sentry-docs-client-array-push	9.8MB	966 bytes (0.01%) ⬆️

Affected Assets, Files, and Routes:

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	873.24kB	-0.0%
static/chunks/7750-*.js	-3 bytes	415.85kB	-0.0%
static/chunks/app/[[...path]]/page-*.js	972 bytes	84.67kB	1.16%
server/middleware-*.js	-5.55kB	1.0kB	-84.74%
server/middleware-*.js	5.55kB	6.55kB	555.3% ⚠️
static/vsFrxS2QFRpY2i-*.js (New)	684 bytes	684 bytes	100.0% 🚀
static/vsFrxS2QFRpY2i-*.js (New)	77 bytes	77 bytes	100.0% 🚀
static/faNJgd1C_V_qcvR6M2tEp/_buildManifest.js (Deleted)	-684 bytes	0 bytes	-100.0% 🗑️
static/faNJgd1C_V_qcvR6M2tEp/_ssgManifest.js (Deleted)	-77 bytes	0 bytes	-100.0% 🗑️

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

Assets Changed:

Asset Name	Size Change	Total Size	Change (%)
1729.js	-3 bytes	1.64MB	-0.0%
1614.js	-73 bytes	1.05MB	-0.01%
../instrumentation.js	-3 bytes	973.36kB	-0.0%
9523.js	-3 bytes	949.31kB	-0.0%
../app/[[...path]]/page.js.nft.json	287.59kB	690.56kB	71.37% ⚠️
../app/platform-redirect/page.js.nft.json	287.59kB	690.48kB	71.38% ⚠️
../app/sitemap.xml/route.js.nft.json	287.59kB	688.45kB	71.74% ⚠️
../app/[[...path]]/page.js	809 bytes	592.36kB	0.14%
../app/sitemap.xml/route.js	5 bytes	34.28kB	0.01%
../app/platform-redirect/page.js	57 bytes	31.66kB	0.18%
9567.js	1.51kB	21.85kB	7.41% ⚠️

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

• ./src/components/apiExamples/apiExamples.tsx → Total Size: 471 bytes

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

Files in 9567.js:

• ./src/remark-dsn-comments.js → Total Size: 4.07kB

• ./src/files.ts → Total Size: 783 bytes

• ./src/mdx.ts → Total Size: 24.12kB

App Routes Affected:

App Route	Size Change	Total Size	Change (%)
/[[...path]]	809 bytes	3.14MB	0.03%
/	5 bytes	2.61MB	0.0%
/platform-redirect	57 bytes	2.58MB	0.0%