Add run v2 version toggle and default run path routing

[Mbeaulne]

Description

Adds a RunVersionToggle component to the app menu that lets users switch between the V1 and V2 run views, mirroring the existing EditorVersionToggle behaviour. When a user is on a V2 run page for the first time, a spotlight welcome dialog introduces the toggle.

A new runRoutes.ts module centralises run path construction via getRunPath and getDefaultRunPath. getDefaultRunPath automatically routes to the V2 run view when the v2_editor flag is enabled, and all previous inline APP_ROUTES.RUNS/${id} path constructions across RunRow, RerunPipelineButton, RunOverview, TangleSubmitter, and the Dashboard TypePill have been replaced with calls to this helper.

The v2_editor flag description has been updated to reflect that it now governs both the editor and the run view. The V2 run routes (/runs-v2/:id and /runs-v2/:id/:subgraphExecutionId) now redirect to their V1 equivalents when the flag is disabled.

EditorV2WelcomeSpotlight has been made generic so its title, description, ARIA label, and storage key behaviour can be reused for the run view welcome spotlight without duplication.

Related Issue and Pull requests

Type of Change

• Bug fix
• New feature
• Improvement
• Cleanup/Refactor
• Breaking change
• Documentation update

Checklist

• I have tested this does not break current pipelines / runs functionality
• I have tested the changes on staging

Screenshots (if applicable)

Test Instructions

1. Enable the v2_editor flag in settings.
2. Navigate to any run — confirm you are taken to /runs-v2/:id.
3. Verify the RunVersionToggle button appears in the app menu and that clicking it switches between /runs/:id and /runs-v2/:id, preserving any subgraph execution segment.
4. On first visit to a V2 run page, confirm the welcome spotlight appears and is dismissed by clicking "Got it" or clicking outside it. Confirm it does not reappear after dismissal.
5. Disable the v2_editor flag and confirm that navigating directly to a /runs-v2/ URL redirects to the V1 equivalent, and that the toggle is hidden.

Additional Comments

The RunVersionToggle reuses EditorV2WelcomeSpotlight with custom props rather than duplicating the spotlight implementation. The seen-run-v2-welcome localStorage key tracks first-time spotlight dismissal independently of the editor welcome key.

[github-actions]

🎩 Preview

A preview build has been created at: run-v2-version-toggle/e82548f

[Mbeaulne]

• poc: minimap - optimize tailwind readability #2550
• feat: v2 - minimap in separate window #2258
• feat: v2 - runview tools window to become a panel #2523
• chore: v2 - runview run menu actions #2522
• chore: v2 - runview actions bar #2521
• chore: v2 - facelift for runview run details #2520
• Add run v2 version toggle and default run path routing #2516 👈 (View in Graphite)
• Refactor run tools layout and add displayLabel/showTooltip props to pipeline buttons #2515
• Add Windows menu and dock layout presets to Run View #2512
• master

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[Mbeaulne]

Merge activity

• Jul 15, 5:17 PM UTC: A user started a stack merge that includes this pull request via Graphite.
• Jul 15, 5:28 PM UTC: Graphite rebased this pull request as part of a merge.
• Jul 15, 5:31 PM UTC: @Mbeaulne merged this pull request with Graphite.