site: cut the template's own labels out of the pages

Point 7 of the page-wording review. The pages no longer show their data
structure as headings, and they no longer explain their own conventions.

- Level 1 is one screen: claim, status badge, three figures, the technology
  row, and one sentence carrying one link. Measured in headless Chrome at
  1440x900: 1404-1845 px tall before, exactly 900 px (no scroll) after, on
  all six area pages.
- DocPage: no kicker line, no visible level label, no "Evidence for this
  page" heading or instruction note, no "Drill-downs" list, no
  "Status <word> - sentence" footer. The artefact table starts at level 2,
  under the heading "Artefacts"; the history timeline is level 2 only.
- Landing page: "Start here" link text gone, "How to read this site" panel
  gone, the footer's status-label explainer gone.
- Content, presentation only, no claim softened: the leading H1 that
  duplicated the page title removed from all 41 documents; level 1 bodies
  reduced to the constraint as ordinary prose plus the way in;
  "**Status: ...**" prefixes removed from the artefact stubs; "## Drill-downs"
  and "## Period and confidence" removed from the level 2 pages, with the
  cross-area links moved into the prose.
- The six level 1 claims are now sentences with a subject, and use commas
  instead of middots. Same facts, no new ones.

Not in this commit: the 35 level 2 and 3 claims still use the compact CV
style. That is a voice decision for Sam, not a wording tidy-up.

make validate: 41 documents, 0 violations. go test ./...: pass.

(cherry picked from commit 03009f80fc7815ad7719412e125df9297a6e653f)

content/ai/l3/ai-guardrails.md

@@ -14,9 +14,7 @@ last_verified: 2026-10-26
 tags: [ai, guardrails, security, artefact]
 ---
 
-# Artefact — Guardrails · hooks in the model path
-
-**Status: stub.** A redacted injection-test result lands in Phase 6, when the guardrail library is wired into this site's own assistant.
+A redacted injection-test result lands in Phase 6, when the guardrail library is wired into this site's own assistant.
 
 ## What the artefact is
 

content/ai/l3/ai-hub-architecture.md

@@ -14,9 +14,7 @@ last_verified: 2026-10-26
 tags: [ai, architecture, artefact]
 ---
 
-# Artefact — House AI hub service topology
-
-**Status: stub.** The diagram and the generated topology dump land in Phase 7 (polish). This stub exists so the level 2 page has no dangling reference.
+The diagram and the generated topology dump land in Phase 7 (polish). This stub exists so the level 2 page has no dangling reference.
 
 ## What the artefact is
 

content/ai/l3/ai-memory-layers.md

@@ -14,9 +14,7 @@ last_verified: 2026-10-26
 tags: [ai, memory, context, artefact]
 ---
 
-# Artefact — Memory in two layers · Engram and Headroom
-
-**Status: stub.** A redacted session handoff and a before-and-after context measurement land in Phase 7.
+A redacted session handoff and a before-and-after context measurement land in Phase 7.
 
 ## What the artefact is
 

content/ai/l3/ai-omniroute-routing.md

@@ -14,9 +14,7 @@ last_verified: 2026-10-26
 tags: [ai, routing, cost, artefact]
 ---
 
-# Artefact — Model routing and cost control
-
-**Status: stub.** The routing decision path and a redacted cost table land in Phase 7. No keys or account identifiers are ever published.
+The routing decision path and a redacted cost table land in Phase 7. No keys or account identifiers are ever published.
 
 ## What the artefact is
 

content/ai/l3/ai-paperclip-pipelines.md

@@ -14,9 +14,7 @@ last_verified: 2026-10-26
 tags: [ai, pipelines, agents, artefact]
 ---
 
-# Artefact — Paperclip and n8n pipelines in production
-
-**Status: stub.** A redacted run log of one pipeline lands in Phase 7, alongside the pipeline inventory.
+A redacted run log of one pipeline lands in Phase 7, alongside the pipeline inventory.
 
 ## What the artefact is
 

content/ai/l3/ai-rag-corpus.md

@@ -14,9 +14,7 @@ last_verified: 2026-10-26
 tags: [ai, retrieval, rag, artefact]
 ---
 
-# Artefact — Retrieval corpus and query graph
-
-**Status: stub.** The query graph diagram and an ingest run log land later; this site's own corpus build is Phase 4.
+The query graph diagram and an ingest run log land later; this site's own corpus build is Phase 4.
 
 ## What the artefact is
 

content/ai/l3/ai-voice-pipeline.md

@@ -14,9 +14,7 @@ last_verified: 2026-10-26
 tags: [ai, voice, audio, artefact]
 ---
 
-# Artefact — Voice pipeline · speech in and speech out
-
-**Status: stub.** A short recording of music ducking under a spoken announcement lands in the optional voice phase. Text describes the chain until then.
+A short recording of music ducking under a spoken announcement lands in the optional voice phase. Text describes the chain until then.
 
 ## What the artefact is