feat: add {random} / {random:N} project name placeholder's

[mynameistito]

Closes #2430.

Adds {random} (10 lowercase hexadecimal characters) and {random:N} (1–32 characters) to project-name templates in both desktop recording paths. Documents the placeholders in settings and the GPUI preview behavior.

Validation: Biome and Rust formatting pass. Focused Rust tests could not run in this environment: the GPUI crate depends on a missing local zed-cap checkout, and the Tauri crate's pinned cidre source is unavailable offline.

Confidence Score: 5/5

The PR appears safe to merge, with both previous findings fixed and no new actionable issues found.

Summary

Adds {random} and {random:N} to project-name templates in both desktop recording paths.

• Recording names can include a random hexadecimal piece.

_{Reviews (3) · Last reviewed commit: "fix: import chrono timezone in project n..." · Reviewed by Greptile}

[richiemcilroy]

Thanks @mynameistito! Greptile is at 4/5 here. We only merge once Greptile reaches 5/5, so please address its findings in the summary above (or reply to them if you think one is wrong), then comment @greptileai review to re-run it. If the branch is behind main, please merge or rebase on main first. Once it is 5/5 we will run the full verification suite on it.

[mynameistito]

@greptile

[mynameistito]

@greptileai review

[mynameistito]

Thanks @mynameistito! Greptile is at 4/5 here. We only merge once Greptile reaches 5/5, so please address its findings in the summary above (or reply to them if you think one is wrong), then comment @greptileai review to re-run it. If the branch is behind main, please merge or rebase on main first. Once it is 5/5 we will run the full verification suite on it.

Hey will do!

I believe my last fixed fixed up the greptile issue!

[vercel]

@mynameistito is attempting to deploy a commit to the Cap Software Inc Team on Vercel.

A member of the Team first needs to authorize it.

[mynameistito]

@greptileai review this

[mynameistito]

All 5/5 now @richiemcilroy