Phase 5: graph + claims views

[MaggieAppleton]

Summary

• Adds ArgumentGraph component (ReactFlow-based) reading nodes from EditorContext.highlights, edges from session.relationships, and positions from session.graphPositions. Supports drag-to-persist positions, edge create/delete, and node deletion (removes the mark from the Remirror doc).
• Adds ClaimsView and ClaimCard components that derive claims and their supporting evidence from the same highlights + relationships sources — no second LLM pass.
• Extends EditorContext with four structural commands (addHighlightAtSelection, appendHighlight, updateHighlightText, removeHighlight) so graph and claims views can mutate the document without touching the DB directly.
• Wires both new views into AnalysisPage.tsx, replacing the Phase 4 placeholders.

Architecture notes

All three analysis tabs (text / graph / claims) share a single Remirror editor instance mounted above the tab conditional. State is never remounted on tab switch — graph/claims read useEditorContext().highlights directly, which re-derives from the live ProseMirror doc on every state change.

Graph positions are persisted to session.graphPositions (Dexie) on drag-stop only — not per-pixel — to avoid excessive DB writes.

Test plan

• npm run build exits 0
• npm run test exits 15/15
• Open an analysed session → all three tabs render content
• Add a highlight in text view → appears as node in graph tab and (if claim) card in claims tab
• Drag a graph node → reload preserves position
• Create an edge between nodes → shows in claims as evidence-of-claim, persists on reload
• Delete a node from graph → mark removed from text view, edges pruned, confirmed on reload
• Edit highlight text in claims view → new text appears in text view

🤖 Generated with Claude Code