Node schema pivot: short name (label) + full-precision statement; description dropped

With real extracted data, full-sentence statements as canvas labels proved
unworkable: 10-line label blocks, illegible overprint clusters, bottom-edge
clipping. Per the user's 2026-09-08 decision:

- GraphNode/ExtractedProposition gain `name` — a very short, glanceable
  label (glossary-headword style: "Will to power"), presentational only:
  not unique, not identity, never precise. Set at creation; link-appends
  never change it (first line defines; labels stay stable across sessions).
- `statement` keeps its full precision and becomes the identity anchor;
  the detail card shows it under the name. `description` is dropped.
- Extractor coins the name (freshest session context); auditor carries it
  through on create, rewording only clearly unglanceable names; linked
  propositions keep the existing node's name.
- Renderer: canvas label = name; search matches name + statement;
  detail card = name (bold) + statement (muted).
- Store guard requires name (pre-pivot node lines are skipped as legacy);
  vision.md node-schema bullet + amendments table updated (2026-09-08).

src/core/graph.ts

@@ -166,10 +166,12 @@ export function mergeFindings(chatId: string, audit: AuditResult, deps: GraphDep
 			// line — the session's phrasings (statement + aliases) join the
 			// node's aliases, the provenance unions. Reads merge by id.
 			graphNodeId = p.linkTo;
+			// Link-append: phrasings + provenance join at read time (the
+			// first line's name/statement/createdAt stand).
 			ledgers.appendNode({
 				id: graphNodeId,
+				name: p.name,
 				statement: p.statement,
-				description: p.description,
 				aliases: [...p.aliases],
 				createdAt: now,
 				provenance: points,
@@ -177,8 +179,8 @@ export function mergeFindings(chatId: string, audit: AuditResult, deps: GraphDep
 		} else {
 			const node: GraphNode = {
 				id: newGraphNodeId(),
+				name: p.name,
 				statement: p.statement,
-				description: p.description,
 				aliases: [...p.aliases],
 				createdAt: now,
 				provenance: points,
@@ -329,8 +331,9 @@ export interface DerivedGraph {
 
 /**
  * The whole graph from the ledgers. Node LINES may repeat an id (link-
- * appends): the FIRST line defines statement/description/createdAt; later
- * lines' statements and aliases join `aliases`, provenance unions. Edge
+ * appends): the FIRST line defines name/statement/createdAt; later
+ * lines' statements and aliases join `aliases`, provenance unions — the
+ * name never changes after creation. Edge
  * LINES are assertions, merged by (from,to,type) with unioned provenance,
  * first-seen order. `store events, derive state` — this is the only reader
  * that matters.