chore: fix flickering version changed modal

[Horusiath]

Summary by Sourcery

Improve version change detection in collaborative sync to avoid reacting to invalid or irrelevant messages.

Bug Fixes:

• Treat only valid, well-formed collab version identifiers as version changes to prevent spurious UI updates.
• Ignore collab messages without update or syncRequest payloads when checking for version changes to avoid unnecessary version change handling.

[sourcery-ai]

Reviewer's guide (collapsed on small PRs)

Reviewer's Guide

Refines how collaboration version IDs are validated and tightens the conditions under which a version change is detected to prevent spurious "version changed" behavior, likely addressing a flickering modal issue.

Sequence diagram for versionChanged detection logic

sequenceDiagram
  participant Caller
  participant SyncContext
  participant CollabMessage
  participant versionChanged
  participant isCollabVersionId

  Caller->>versionChanged: versionChanged(SyncContext, CollabMessage)
  activate versionChanged
  versionChanged->>CollabMessage: check update
  versionChanged->>CollabMessage: check syncRequest
  alt no update and no syncRequest
    versionChanged-->>Caller: false
  else has update or syncRequest
    versionChanged->>CollabMessage: read version (update.version or syncRequest.version)
    versionChanged->>SyncContext: read doc.version
    versionChanged->>isCollabVersionId: isCollabVersionId(incomingVersion)
    activate isCollabVersionId
    isCollabVersionId->>isCollabVersionId: UUID_REGEX.test(value)
    isCollabVersionId-->>versionChanged: incomingKnown
    deactivate isCollabVersionId
    versionChanged->>isCollabVersionId: isCollabVersionId(localVersion)
    activate isCollabVersionId
    isCollabVersionId->>isCollabVersionId: UUID_REGEX.test(value)
    isCollabVersionId-->>versionChanged: localKnown
    deactivate isCollabVersionId
    versionChanged->>versionChanged: compare versions based on known flags
    versionChanged-->>Caller: boolean
    deactivate versionChanged
  end

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File-Level Changes

Change	Details	Files
Replace UUID library-based validation with an inline regex and narrow version-change detection to specific message types.	Introduce an in-module UUID_REGEX that validates v1–v8 UUIDs plus all-zero and all-ones sentinel values Update isCollabVersionId to use the new UUID_REGEX instead of the external uuidValidate helper Guard versionChanged to early-return false when the collab message is neither an update nor a syncRequest, limiting version change checks to those two types	src/components/ws/sync/types.ts

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[sourcery-ai]

Hey - I've left some high level feedback:

• The custom UUID_REGEX is fairly complex and encodes some special cases (all zeros/all fs); consider centralizing this as a shared UUID utility or adding inline comments breaking down the pattern to make future maintenance and updates easier.
• The early return in versionChanged for messages without update or syncRequest changes its behavior scope; consider explicitly narrowing the collab.ICollabMessage type (e.g., via a union or type guard) so that the function’s intended input domain is enforced at the type level rather than via a runtime check.

Prompt for AI Agents

Please address the comments from this code review:

## Overall Comments
- The custom UUID_REGEX is fairly complex and encodes some special cases (all zeros/all fs); consider centralizing this as a shared UUID utility or adding inline comments breaking down the pattern to make future maintenance and updates easier.
- The early return in versionChanged for messages without update or syncRequest changes its behavior scope; consider explicitly narrowing the collab.ICollabMessage type (e.g., via a union or type guard) so that the function’s intended input domain is enforced at the type level rather than via a runtime check.

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[Horusiath]

You really don't need an entire dependency for a single regex test.