ENG-2038 Add admin-flagged node card context menu to Obsidian tldraw

[sid597]

Summary

• add a default-off admin flag for the Obsidian node-card context menu
• replace tldraw's style panel only when a single discourse-node is selected
• show Context by default and reuse tldraw's native styling controls in the Styling tab
• embed the existing relation-panel actions in Context
• show incoming and outgoing relation groups in the new menu, including configured empty groups and deduplicated linked files
• preserve the existing relation overlay and regular tldraw shape behavior
• add one CSS rule to widen this menu because tldraw hard-caps its style panel at 148 px

Behavior boundaries

• Flag off, non-discourse selections, and multi-select continue to render tldraw's stock DefaultStylePanel.
• includeAllDirections is explicit at the new menu call site; embedded controls layout only.
• The legacy relations panel keeps its prior behavior: matchingRelations.slice(0, 1) uses the same predicate and first match as the previous .find(...), and its counterpart lookup is unchanged.
• The new menu opts into all configured directions without changing the legacy overlay.
• The localized ComponentType casts are required because tldraw is typed against React 19 while the Obsidian app runs React 18; plain JSX adds TS2786 diagnostics. The repository-wide React type mismatch is intentionally out of scope.

Scope

This PR changes seven Obsidian production files only. It adds one load-bearing CSS rule and no test command, test framework, dependency, lockfile change, or standalone model layer.

Linear: https://linear.app/discourse-graphs/issue/ENG-2038/add-admin-flagged-node-card-context-menu-to-obsidian-tldraw

Validation

• pnpm --filter @discourse-graphs/obsidian build — built with 0 errors
• package-local ESLint over all changed TypeScript files — passed with 0 warnings/errors
• Prettier and git diff --check — passed
• built CSS contains the width override and the defined tldraw --color-text-3 token

Known validation gaps

• the interaction has not yet been driven in a live Obsidian vault; no running Obsidian process, configured plugin mirror, or project-local vault was available in this environment
• the vault drive must include discourse node → plain rectangle → discourse node in both themes to inspect the selection-conditional 148 px ↔ 320 px width change for jitter or poor content reflow; add a transition only if that runtime behavior reads badly
• ENG-2038's automated-test Done-When is not met: apps/obsidian has no test harness, and a deferral ticket plus the ticket owner's acceptance are still required
• package-wide check-types remains red with the same 20 pre-existing tldraw/React JSX type-identity diagnostics; no diagnostic is introduced in NodeCardContextMenu or RelationPanel
• local validation used Node 20.20.2 while the repository declares Node >=22; pnpm emitted an engine warning

[linear-code]

ENG-2038

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1 Skipped Deployment

Project	Deployment	Actions	Updated (UTC)
discourse-graph	Skipped		Jul 27, 2026 5:21pm