fix(linkedin): close dogfood friction (S14)

Close all 9 friction points from the S13 newsletter dogfood (operator
elected to fix F6-F9 rather than defer):

- F1: namespace all subagent_type calls in newsletter.md to
  linkedin-thought-leadership:<name> (4 sites + canonical note)
- F2: document agent invocation form + reload requirement in CLAUDE.md
  + README.md (reload itself is an operator action)
- F3: add edition-config / edition-delingstekst / edition-HANDOVER
  templates under config/ + wire into Steps 0 and 8 + footer
- F4: reconcile draft path to <serie>/NN-utkast.md (series root)
- F5: de-hardcode series root (explicit arg / LTL_SERIES_ROOT / default)
- F6: config-derive carousel editions (remove Seres CAROUSEL set);
  correct samle comment
- F7: build-html.mjs exits non-zero when zero HTML produced
- F8: guard parseDelingstekst (graceful ENOENT) + correct Step 8 wording
- F9: relocate agents/README.md -> docs/agents-capability-matrix.md

Re-tested: 87/87 plugin tests pass; build-html/build-linkedin behavior
re-verified live. Per-item outcomes logged in dogfood-S13-friction.md.

Co-Authored-By: Claude Opus 4.7 <noreply@anthropic.com>

plugins/linkedin-thought-leadership/config/edition-HANDOVER.template.md

@@ -0,0 +1,56 @@
+<!--
+  TEMPLATE — edition-HANDOVER.md  (narrative production state for one edition)
+
+  Purpose : the human-readable narrative companion to edition-state.json. Where
+            edition-state.json is the machine-readable resumption state (currentPhase,
+            per-article status), this HANDOVER carries the *narrative* state a human
+            (or the next session) reads to understand where the edition is, what is
+            immutable, and what happens next. /linkedin:newsletter Step 0 reads it;
+            every phase appends to §6.
+  Decision: G — production lives in the series root, NOT the plugin. Copy this to
+            <serie>/linkedin/edition-HANDOVER.md (or <serie>/HANDOVER.md) and fill in.
+  DISTINCT  from the plugin's own docs/BUILD-HANDOVER.local.md (which governs building
+            the plugin). Never merge the two.
+
+  Section numbering is referenced by name in commands/newsletter.md:
+  §1 where we are · §3–§5 brief/rules/calibration · §4 immutable rules + fact-check
+  log · §5 persona calibration + conversion verdict · §6 next-session pointer.
+-->
+
+# Edition HANDOVER — <series title>, article <NN> "<edition title>"
+
+## §1 — Where we are
+- Current phase: <currentPhase, mirrors edition-state.json>
+- Article status: <pending | in-progress | locked | scheduled>
+- One-line state: <e.g. "draft complete, consistency pass next" or "locked, awaiting hook gate">
+
+## §2 — Premise & angle
+- Premise (one clear claim): <…>
+- Angle / dramaturgical spine: <…>
+- Leader-takeaway (the one thing a busy reader keeps): <…>
+
+## §3 — Brief & scope
+- Audience personas (active set; mark primær): <persona A (PRIMÆR), persona B, …>
+- Key points (2–4): <…>
+- Tone / voice anchor: <reference to assets/voice-samples + any edition-specific note>
+- Out of scope for this edition: <…>
+
+## §4 — Immutable rules + fact-check log
+> Rules locked for this edition (do not relitigate mid-pipeline):
+- <immutable rule 1 — e.g. "no vendor names in the hook">
+- <immutable rule 2>
+
+> Fact-check log (Step 5 — guilty-until-disproven; 🔴 must be empty before lock):
+| Claim | Risk | Source / verification | Status |
+|-------|------|-----------------------|--------|
+| <claim> | 🔴/🟡/🟢 | <primary source> | open / resolved |
+
+## §5 — Persona calibration + verdicts
+- Pre-lock resonance sweep (Step 6): primær <name> → <JA / NEI + one-line reason>
+- Method/persona calibration notes: <any axis tuning, secondary-NO signals>
+- Post-lock conversion sweep (Step 9): primær <name> mode konverter → <JA / NEI>
+
+## §6 — Next session
+- Next step: Step <N> — <name> (per the Step 0 resumption table)
+- Precise pointer: <e.g. "draft resumes at section 3" or "render POST.html, then hook gate">
+- Open questions for the operator: <…, or "none">