feat: standalone Goal Tree page with 3D tree and list views

[atomantic]

Summary

• Add hierarchical goal system with parentId and tags fields to goal schema, with lazy migration for existing goals
• New GET /goals/tree endpoint that builds hierarchical tree structure with tag index
• Cycle detection on parent updates, orphan-on-delete reparenting (children move to grandparent)
• New /goals standalone page with two URL-driven tabs:
  • Tree view: 3D Three.js visualization with category-colored spheres, urgency-based sizing/glow, parent-child + tag cross-link edges, OrbitControls, category filter bar, search, legend
  • List view: Collapsible indented tree with search, inline add sub-goal, expand/collapse all
• Shared GoalDetailPanel for editing goals (title, description, category, horizon, parent, tags), managing milestones, complete/delete actions
• Tiered radial layout: lifetime goals at center, shorter horizons in outer rings, sub-goals clustered near parents

Test plan

• Server tests pass (1772 tests)
• Client builds successfully
• Navigate to /goals/tree — see 3D tree (empty or with migrated root goals)
• Create root goal, add sub-goals beneath it — verify parent-child edges render
• Switch to /goals/list — see indented list, edit inline, add sub-goals
• Add tags to goals, verify cross-link edges appear in tree view
• Delete a parent goal — verify children reparent to grandparent
• Verify existing Digital Twin > Goals tab still works unchanged

[Copilot]

Pull request overview

Adds hierarchical goals (parent/child + tags) and a standalone Goals page that can render both a 3D tree visualization and an indented list, backed by a new server endpoint that returns a computed goal tree.

Changes:

• Server: extend goal schema with parentId + tags, add lazy migration, add cycle detection + orphan-on-delete reparenting, and introduce GET /goals/tree.
• Client: add /goals/:tab page with Tree/List views and a shared GoalDetailPanel for editing goals, tags, milestones, and actions.
• Docs: add a research note about POSThuman integration (currently unrelated to the goals feature PR).

Reviewed changes

Copilot reviewed 12 out of 12 changed files in this pull request and generated 8 comments.

Show a summary per file

File	Description
server/services/identity.js	Adds lazy migration for new goal fields, parent validation + cycle detection, reparent-on-delete, and getGoalsTree() for hierarchical output.
server/routes/identity.js	Exposes GET /api/digital-twin/identity/goals/tree.
server/lib/identityValidation.js	Extends Zod schemas to accept parentId and tags.
client/src/services/api.js	Adds getGoalsTree() API wrapper.
client/src/pages/Goals.jsx	New standalone Goals page with URL-driven Tree/List tabs and refresh.
client/src/components/goals/goalTreeLayout.js	Computes a tiered radial 3D layout + parent/tag edges.
client/src/components/goals/GoalsTreeView.jsx	Renders 3D graph via Three/Fiber with filtering, search, legend, and detail panel selection.
client/src/components/goals/GoalsListView.jsx	Renders hierarchical list UI with expand/collapse, search, and inline sub-goal creation.
client/src/components/goals/GoalDetailPanel.jsx	Shared detail/edit panel including parent selection, tags, milestones, complete/delete actions.
client/src/components/Layout.jsx	Adds a top-level “Goals” nav item and treats /goals as full-width.
client/src/App.jsx	Adds routes for /goals and /goals/:tab.
docs/research/posthuman-web-feature-review.md	Adds POSThuman feature review doc (not directly tied to goal-tree feature).

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[Copilot]

Pull request overview

Copilot reviewed 13 out of 13 changed files in this pull request and generated 5 comments.

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[Copilot]

Pull request overview

Copilot reviewed 13 out of 13 changed files in this pull request and generated 6 comments.

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[Copilot]

Pull request overview

Copilot reviewed 13 out of 13 changed files in this pull request and generated 6 comments.

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[Copilot]

Pull request overview

Copilot reviewed 13 out of 13 changed files in this pull request and generated 1 comment.

Comments suppressed due to low confidence (1)

server/services/identity.js:774

• updateGoal recalculates and persists goal.urgency even when the goal status is changed to non-active (e.g., completed/abandoned). This can leave completed goals showing urgency in the UI and diverges from setBirthDate/getGoalsTree, which only compute urgency for status === 'active'. Consider setting urgency to null when status is not active, and only recomputing urgency when the goal is active (and/or when horizon changes).

  // Recalculate urgency if horizon changed
  const longevity = await loadJSON(LONGEVITY_FILE, DEFAULT_LONGEVITY);
  if (longevity.timeHorizons) {
    goal.urgency = computeGoalUrgency(goal, longevity.timeHorizons);
  }

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