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/pie-chart-overload.md

@@ -1,12 +1,22 @@
 ---
 title: "Pie Chart Overload"
 summary: "Eight near-identical slices no human eye can rank. A bar chart was right there."
+poke: "Eight slices, three of them the same size. Nobody can read this. A bar chart could."
 category: "Chart-Type Abuse"
 severity: 3
 tags: ["pie chart", "part-to-whole", "comparison"]
 badChart: "pie-overload-bad"
 fixedChart: "pie-overload-fixed"
 date: 2026-08-05
+citations:
+  - key: fewpies
+    note: "“Save the Pies for Dessert” — the definitive, free takedown of the overloaded pie."
+  - key: clevelandmcgill
+    note: "Their ranking shows angle and area are judged far worse than position along a scale."
+  - key: junkcharts
+    note: "Kaiser Fung’s running #onelesspie campaign exists for precisely this chart."
+  - key: datatoviz
+    note: "Pie charts are the first entry in its catalogue of caveats."
 ---
 
 ## The sin