fix: Make canvas versioning text shorter

[cursor]

Shorten verbose tooltip text, descriptions, and labels across the canvas versioning UI to improve readability and reduce clutter.

Changes

Header.tsx (editing dropdown tooltips):

• "Create a change request from your current draft." → "Create a change request from your draft."
• "Discard draft changes and reset it to match the current live version." → "Reset draft to match the live version."
• "Exit edit mode and return to the live version." → "Return to the live version."

CanvasVersionControlSidebar.tsx:

• "Comparing ... against the previous published version." → "Comparing ... against the previous version."
• "View node diff with previous version" → "Compare with previous version"

CanvasSettingsView.tsx:

• "Manage canvas edits with drafts and publish flow. When disabled, users edit the live canvas directly." → "Control draft and publish flow for this canvas."
• Removed redundant "This toggle controls versioning for this canvas." sentence

CreateChangeRequestModal.tsx:

• "Add a title and summary. This will create a change request snapshot from your current draft." → "Create a change request from your current draft."
• "This draft is outdated because the live version was updated after this draft was created. Create anyway?" → "The live version has changed since this draft was created. Create anyway?"
• "Enable edit mode and save your draft before creating a change request." → "Enable edit mode and save your draft first."
• "Current draft is outdated because the live version is newer." → "Draft is outdated."

CanvasChangeRequestsView.tsx:

• "Select a request to open it in a dedicated PR view." → "Select a request to view details."
• "This change request is conflicted. It cannot be approved until conflicts are resolved." → "Resolve conflicts before approving."
• "Conflicts found in this request. Open resolver to merge node changes." → "This request has conflicts that need resolving."

index.tsx (disabled state tooltips):

• "Versioning is disabled. Enable canvas versioning in canvas settings." → "Versioning is disabled. Enable it in canvas settings."
• "Enable edit mode before creating a change request." → "Enable edit mode first."
• "Save your version before creating a change request." → "Save your draft first."
• "Enable edit mode before resetting draft changes." → "Enable edit mode first."
• "Draft versions do not execute. Publish to run this canvas." → "Publish to run this canvas."

CanvasPage/index.tsx:

• "Previewing Previous Version" → "Previewing Version"

Closes #3515

  

[superplanehq-integration]

👋 Commands for maintainers:

• /sp start - Start an ephemeral machine (takes ~30s)
• /sp stop - Stop a running machine (auto-executed on pr close)