Add editor section node; serialize pnpm CI jobs to fix runner flake

Two corrective changes:
- Register the `section` node in the web TipTap editor (with
  wrapInSection/unwrapSection commands) so the editor schema matches the
  shared editorSchema again. The schema-drift guard
  (document-extensions.test) rightly failed after 2e96173 added `section`
  to the shared schema without the editor side — this restores it.
- Replace the ineffective warm-up gate with a serial chain of the pnpm
  CI jobs (checks -> auth-e2e -> fidelity). Warming the shared action
  cache did not help: the dependent jobs still started together and
  corrupted the cache during concurrent extraction. Serializing them is
  what actually prevents it; CD image builds still run in parallel.

Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01EwZ4jR4KFAPvpjWevfUGX1

.gitea/workflows/ci.yml

@@ -13,29 +13,16 @@ on:
     branches: [main]
 
 jobs:
-  # Warm the runner's shared action cache once, alone, before the parallel
-  # pnpm jobs start. With the runner at capacity > 1, several jobs otherwise
-  # fetch the same actions (checkout, setup-node, pnpm/action-setup) into the
-  # shared offline cache simultaneously and read it half-written — a flaky
-  # "Cannot find module .../dist/…" in "Set up Node.js"/"Set up pnpm". Running
-  # these actions once here populates the cache completely; the dependent jobs
-  # then only read it. Cheap (~30 s) and keeps full parallelism afterwards.
-  prepare:
-    name: Warm action cache
-    runs-on: ubuntu-latest
-    steps:
-      - name: Check out repository
-        uses: actions/checkout@v4
-      - name: Set up pnpm
-        uses: pnpm/action-setup@v4
-      - name: Set up Node.js
-        uses: actions/setup-node@v4
-        with:
-          node-version: 22
-
+  # The pnpm jobs are chained (checks -> auth-e2e -> fidelity) so no two run
+  # at once. At runner capacity > 1 they otherwise start together and extract
+  # the same actions (setup-node, pnpm/action-setup) into the shared offline
+  # cache (`/run/act/actions`) concurrently, reading it half-written — a flaky
+  # "Cannot find module .../dist/…" in "Set up Node.js"/"Set up pnpm". Warming
+  # the cache first did not help (concurrent extraction still corrupts it);
+  # only serialization does. The CD image builds still run in parallel, so the
+  # runner's spare capacity is not wasted.
   checks:
     name: Lint, typecheck, test
-    needs: prepare
     runs-on: ubuntu-latest
     services:
       postgres:
@@ -86,7 +73,7 @@ jobs:
   # already-built-and-seeded stack, instead of spinning up a second one.
   auth-e2e:
     name: Auth e2e pack
-    needs: prepare
+    needs: checks
     runs-on: ubuntu-latest
     services:
       postgres:
@@ -377,7 +364,7 @@ jobs:
   # job (no sidecars there).
   fidelity:
     name: Import/export fidelity gate
-    needs: prepare
+    needs: auth-e2e
     runs-on: ubuntu-latest
     # A guard so a hung sidecar can never keep the job (and its containers)
     # alive on the shared runner host; the suite itself finishes in ~1 min.
@@ -458,7 +445,7 @@ jobs:
 
   images:
     name: Build container images
-    needs: prepare
+    needs: checks
     # PR-only: on main the CD workflow builds and pushes the same images —
     # building twice would waste the runner (ADR 0014: build once, promote).
     if: github.event_name == 'pull_request'

apps/web/src/editor/document-extensions.ts

@@ -15,6 +15,7 @@ import {
   Heading,
   HorizontalRule,
   Paragraph,
+  Section,
   Text,
 } from './nodes/text-basics';
 
@@ -29,6 +30,7 @@ export const documentExtensions: AnyExtension[] = [
   Paragraph,
   Heading,
   Blockquote,
+  Section,
   CodeBlock,
   HorizontalRule,
   BulletList,

apps/web/src/editor/nodes/text-basics.ts

@@ -13,6 +13,12 @@ declare module '@tiptap/core' {
       setHorizontalRule: () => ReturnType;
       setHardBreak: () => ReturnType;
     };
+    documentSection: {
+      /** Wrap the selection in a styled section (issue #75). */
+      wrapInSection: (attrs: { pluginId: string; styleId: string }) => ReturnType;
+      /** Unwrap the nearest section, leaving its content in place. */
+      unwrapSection: () => ReturnType;
+    };
   }
 }
 
@@ -112,6 +118,30 @@ export const Blockquote = Node.create({
   },
 });
 
+const sectionSpec = nodeSpec('section');
+export const Section = Node.create({
+  name: 'section',
+  group: sectionSpec.group,
+  content: sectionSpec.content,
+  defining: sectionSpec.defining,
+  addAttributes() {
+    return attributesFromSpec(sectionSpec);
+  },
+  ...passthroughNodeIO(sectionSpec),
+  addCommands() {
+    return {
+      wrapInSection:
+        (attrs) =>
+        ({ commands }) =>
+          commands.wrapIn(this.name, attrs),
+      unwrapSection:
+        () =>
+        ({ commands }) =>
+          commands.lift(this.name),
+    };
+  },
+});
+
 const codeBlockSpec = nodeSpec('code_block');
 export const CodeBlock = Node.create({
   name: 'code_block',