feat(linkedin): v2.3.0 — Step 7.5 visual-assets phase in /linkedin:newsletter

Endring 7 from the change-spec: make visual assets an explicit pipeline
phase. New Step 7.5 (visual-assets) between annotation (Step 7) and lock
(Step 8): cover (+ optional inline figures) or carousel deck, generated and
operator-gated BEFORE lock so build-linkedin.mjs picks up cover.png at lock
without a post-lock re-render. Pipeline 13 → 14 phases.

- commands/newsletter.md: Step 7.5 section, pipeline overview + build-status,
  resumption table (annotation → 7.5; new visual-assets → 8), Step 8
  precondition, reference-file list.
- config/edition-state.template.json: visual-assets phase + additive
  articles.NN.visualAssets schema (format / cover / figures / carousel).
- config/image-credit-caption.template.md (new): motif + credit + caption
  table, honest-about-AI credit, naming convention.
- Two generation routes, no lock-in: default mcp-image (cover-v<N>-kandidat.png)
  or external cover-raw.png. Operator-gate via SendUserFile → cp to cover.png.
  Carousel branch reuses render/build-carousel.mjs.
- Doc/orchestration-only — no new code. Commands (24) + agents (15) unchanged.
- Version sync 2.2.0 → 2.3.0 across plugin.json, CHANGELOG, README, CLAUDE.md,
  root README + root CLAUDE.md.

Correction: spec claimed build-linkedin.mjs handles fig1-4; verified it does
NOT — it embeds only cover.png by fixed name; figures are referenced in the
draft markdown and uploaded manually. Step 7.5 documents actual behavior.

All 8 acceptance criteria met. JSON valid (14 phases); 20/20 render tests pass.

Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>

plugins/linkedin-thought-leadership/config/edition-state.template.json

@@ -15,11 +15,13 @@
       "factcheck-sweep — risk-sorted, guilty-until-disproven, verification log (Step 5)",
       "persona-sweep-prelock — reader jury, primary wins, convergence to clean YES (Step 6)",
       "annotation — optional annotatable review HTML for a manual pass (Step 7)",
+      "visual-assets — cover (+ optional inline figures) or carousel deck: brief → generate → operator-gate → approve, BEFORE lock so build-linkedin.mjs picks them up (Step 7.5)",
       "lock-delivery — LOCK → POST.html all-in-one-place deliverable (Step 8)",
       "hook-conversion-gate — persona gate on distribution text post-lock: would YOU click? (Step 9)",
       "scheduling — register edition in plugin queue/state for native LinkedIn scheduling (Step 10)"
     ],
-    "articleStatusValues": ["pending", "in-progress", "locked", "scheduled"]
+    "articleStatusValues": ["pending", "in-progress", "locked", "scheduled"],
+    "visualAssets": "Per-article visual-asset record written by Step 7.5 (visual-assets phase). Runs BEFORE lock because render/build-linkedin.mjs picks up linkedin/NN/cover.png + the edition-config credit/caption when it builds POST.html — generating images after lock would force a re-render. Shape: { format: \"standard\" | \"carousel\"; cover: { brief, route, candidates[], approved, status }; figures: [ { id, brief, placement, status } ]; carousel: null | { source, pdf, status } }. format \"standard\" = cover + optional inline figures (cover.png is mandatory per the KTG cover-directive); format \"carousel\" = typografisk deck via render/build-carousel.mjs instead of cover+inline (cover/figures stay empty). route: \"mcp-image\" (default, via mcp__mcp-image__generate_image) | \"external\" (DALL·E / Midjourney / photographer → linkedin/NN/cover-raw.png). status ladder: pending → briefed → generated → approved. candidates[] holds the cover-v<N>-kandidat.png attempts; approved is the fixed approved name (\"cover.png\") once the operator-gate passes. figures[].id = \"fig1\"..; placement = section reference in NN-utkast.md (figures are referenced in the draft via ![alt](linkedin/NN/figN.png) and uploaded manually in the LinkedIn editor — build-linkedin.mjs does NOT embed them). Naming convention: cover.png (approved, fixed — what build-linkedin.mjs reads) | cover-v<N>-kandidat.png (attempts) | cover-raw.png (optional external pre-edit source) | fig<N>.png (inline). credit + caption are recorded in <serie>/linkedin/image-credit-caption.md and flow into edition-config.json coverCredit + captions[NN]."
   },
   "schemaVersion": 1,
   "series": {
@@ -41,6 +43,18 @@
         "resonance": null,
         "conversion": null
       },
+      "visualAssets": {
+        "format": "standard",
+        "cover": {
+          "brief": null,
+          "route": null,
+          "candidates": [],
+          "approved": null,
+          "status": "pending"
+        },
+        "figures": [],
+        "carousel": null
+      },
       "locked": false,
       "scheduled": null
     }