feat(capture): improve capture quality + clean up CLAUDE.md

Capture improvements:
- Font weights via document.fonts API + DOM sampling (variable font detection)
- Section background-image extraction (no more false #FFFFFF on hero photos)
- Detected libraries surfaced in CLAUDE.md brand summary
- Structured visible-text.txt with [tag] prefixes, cookie/nav noise filtered
- tokens.json cleaned: removed images/paragraphs/icons (duplicated elsewhere),
  filtered sections to heading-only, trimmed cssVariables to design-relevant
- Removed redundant scroll pass in htmlExtractor (2-5s faster per capture)
- Font cap at 20 families, Placeholder/Fallback fonts filtered

CLAUDE.md rewrite:
- Removed prescriptive tone ("use exact strings" → "rephrase freely")
- Removed fluff sections (How to Create, DESIGN.md warning, Example Prompts,
  Source Patterns)
- asset-descriptions.md promoted to first data row
- Removed assets-catalog.json from inventory

Skill fixes:
- Dead shader refs → point to packages/shader-transitions/README.md
- Google Fonts import in techniques.md → local @font-face placeholder
- Added Stripe DESIGN.md as light-brand example
- Removed HANDOFF.md generation from step-7
- Updated step-1 for new font weight + visible-text formats

packages/cli/src/commands/capture.ts

@@ -131,7 +131,20 @@ export default defineCommand({
         console.log(`  ${c.dim("Screenshots:")} ${result.screenshots.length}`);
         console.log(`  ${c.dim("Assets:")} ${result.assets.length}`);
         console.log(`  ${c.dim("Sections:")} ${result.tokens.sections.length}`);
-        console.log(`  ${c.dim("Fonts:")} ${result.tokens.fonts.join(", ")}`);
+        console.log(
+          `  ${c.dim("Fonts:")} ${result.tokens.fonts
+            .map(function (f) {
+              return (
+                f.family +
+                " (" +
+                (f.variable && f.weightRange
+                  ? f.weightRange[0] + "-" + f.weightRange[1] + " variable"
+                  : f.weights.join(",")) +
+                ")"
+              );
+            })
+            .join(", ")}`,
+        );
         if (result.warnings.length > 0) {
           console.log();
           for (const w of result.warnings) {