Reframe as a linkable, cited callout ("nohello for charts")

Make each sin a self-contained page you send instead of re-explaining:

- Per-sin "poke" one-liner (the shareable callout)
- Citations system: a canonical bibliography (src/lib/references.ts) of the
  field's giants — Munzner, Knaflic, Tufte, Cairo, Few, Cleveland & McGill,
  Wilke, Healy, Calling Bullshit, data-to-viz, Junk Charts, Spurious
  Correlations, FT Visual Vocabulary — cited per sin with a relevance note
- "Don't take our word for it" receipts block on each sin
- /canon page: the full annotated bibliography
- Share control: copy-link "send them the receipt" (progressive enhancement)
- Restructured sin page: poke -> proof -> why -> receipts -> share
- Header nav (Sins / Canon); homepage reframed to the "send the link" mission

Also fix the truncated-axis bad chart: clamp the [90,100] domain so the bar
baseline doesn't overflow thousands of pixels off-canvas.

Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01XPEvmMbac2fCvKXpQcovj8

src/content/sins/dual-axis-deception.md

@@ -1,12 +1,22 @@
 ---
 title: "The Dual-Axis Deception"
 summary: "Two unrelated series on two independent axes, engineered to look correlated."
+poke: "Two y-axes, tuned until the lines kiss. Congratulations — you can now make anything 'cause' anything."
 category: "False Relationships"
 severity: 5
 tags: ["dual axis", "correlation", "line chart"]
 badChart: "dual-axis-bad"
 fixedChart: "dual-axis-fixed"
 date: 2026-08-05
+citations:
+  - key: datatoviz
+    note: "Lists “using two Y axes” as a top caveat — a way to manipulate the story."
+  - key: spurious
+    note: "Thousands of nonsense correlations: proof that “they move together” proves nothing."
+  - key: howchartslie
+    note: "Cairo on how aligned axes manufacture relationships that aren’t there."
+  - key: swd
+    note: "Knaflic’s standing advice: avoid the second axis; separate or index instead."
 ---
 
 ## The sin