docs: generate each subsystem's cordis surface into its own page; delete the flat catalogs

Rebuild of the region machinery (PR3) on the post-#904 Typert projection:
renderPageRegion/renderInheritedPage live in dsh-typert-generator beside the
projection; scripts/gen-cordis-catalog.ts owns the curated SERVICE_PAGE /
EVENT_SCOPE_PAGE / SERVICE_WALK_EXEMPTIONS / LINK_MAP partition (fail-loud in
both directions, with the independent Context-merge scan backstopping the
projection's blind spot), spliceRegion, and the guarded pair auto-record.
docs/cordis-catalog/ is deleted: the flat events/services catalogs dissolve
into per-page regions and docs/cordis-catalog/core moves to docs/cordis-api/
with the inherited tier as its own generated page. The partition absorbs the
post-regrouping surface: ctx.typert → invariants.md, ctx.directoryPicker →
workspace.md, skills/* events → skills.md, and the four launcher-provided tui
accessor values join the named exemptions.

docs/subsystems/token-meter.md

@@ -41,3 +41,50 @@ interface TokenSurfaceNode {
 ```
 
 Surface order is authoritative; replacement nodes can have higher durable seqs than later positional nodes. The snapshot is immutable and does not grow when the underlying replay fold advances.
+
+<!-- BEGIN GENERATED cordis-surface (gen-cordis-catalog.ts) — do not edit between markers -->
+
+<a id="cordis-surface"></a>
+
+## Cordis surface
+
+Generated from source by `scripts/gen-cordis-catalog.ts` (verified fresh by `pnpm run verify-cordis-catalog` in doc-sync; regenerate with `pnpm run gen-cordis-catalog`) — this section is byte-identical in both language sides of the page. Signature blocks use a `ts cordis-catalog` fence and keep the original source JSDoc; dispatch modes are defined in the [primer](../cordis-primer.md#dispatch-modes), and the framework-inherited `ctx` surface lives in [cordis-api/inherited.md](../cordis-api/inherited.md).
+
+<a id="ctxtokenmeter--tokenmeterservice"></a>
+
+### `ctx.tokenMeter` — `TokenMeterService`
+
+Replay owner for one service-wide estimator and isolated per-session folds.
+
+```ts cordis-catalog
+/**
+ * Measure current request pressure and surface through the durable tail.
+ *
+ * Provider usage is reused only when the latest successful call's canonical
+ * request envelope matches `requestHeader` and its total is no lower than
+ * that call's full heuristic anchor; otherwise the complete envelope and
+ * surface are heuristically repriced.
+ *
+ * `requestHeader` affects request pressure only; surface fields always
+ * describe the current session surface. Every call clones those positional
+ * nodes, so measurement is O(surface).
+ *
+ * @param session - session to replay through its current durable tail.
+ * @param requestHeader - optional effective request envelope replacing the latest logged header.
+ * @returns a detached deeply immutable pressure and surface measurement.
+ */
+measure(session: Session, requestHeader?: EpochHeader): TokenMeasurement
+
+/**
+ * Heuristically price one model-visible message (instance face of the pure
+ * `estimateMessage` export from `estimate.ts`).
+ * @param message - message to price without mutation.
+ * @returns content and role-framing tokens under the fixed service heuristic.
+ */
+estimateMessage(message: Message): number
+```
+
+Types: [EpochHeader](session.md) · [Message](core.md) · [Session](session.md)
+
+Source: [`packages/llm/token-meter/src/index.ts:74`](../../packages/llm/token-meter/src/index.ts)
+<!-- END GENERATED cordis-surface -->