feat(web): hero redesign — cycling step rotator + full-width video section

Restructures the landing page above-the-fold into two distinct sections:

1. **Hero — left copy + cycling tile, no static stack of three blocks**
   New `<HeroStepRotator>` (Framer Motion client component) shows ONE
   tile centred in the column, cycling prompt.txt → build.log →
   claude_desktop_config.json every 3.5s. Auto-advance pauses on hover
   and exposes a 3-dot tablist so users can jump to any step. The active
   dot grows wide with an accent glow.

   Mouse interaction: spring-smoothed 3D tilt on rotateX/rotateY plus a
   radial glow that translates toward the cursor — both driven by motion
   values, so the transforms stay on the GPU compositor instead of
   re-rendering on every mousemove. `useReducedMotion()` strips the
   tilt + glow translation and collapses the page transition to an
   instant cross-fade (the rotation itself still advances — it's content,
   not decoration).

   Hero padding tightened (py-12/14/16 vs py-14/20/28) so the video
   section below is teased above the fold. New scroll cue ("see it run"
   + animated chevron) sits at the bottom of the hero, anchored to
   #flow.

2. **Flow video — full-width edge-to-edge under the hero (new section)**
   The hero.mp4 / hero.webm pair moves out of the "How it works"
   section into its own #flow section. No max-w wrapper — it spans the
   viewport with `w-full aspect-video`, so on a 1080p monitor the video
   gets the full 1920px width. Adds a subtle radial vignette so the
   black edges blend into the page chrome.

3. **"How it works" — now lean**
   Video removed (it's the flow section now). Just the three textual
   cards as supporting copy.

Adds `framer-motion@11.18.2` to apps/web/package.json. Build passes
typecheck + Next.js production build with no new warnings; LCP path is
untouched since the rotator is client-hydrated after first paint and
Framer Motion is tree-shaken to the components we import.

Note: visitors with `prefers-reduced-motion: reduce` will still see the
video's poster instead of autoplay — Chrome blocks the network fetch
entirely for autoplay media when reduced-motion is set. The flow video
remains visible for the rest, and the step rotator continues to cycle
its content (with instant cross-fade instead of slide+scale).

Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>

pnpm-lock.yaml

@@ -140,6 +140,9 @@ importers:
       clsx:
         specifier: 2.1.1
         version: 2.1.1
+      framer-motion:
+        specifier: 11.18.2
+        version: 11.18.2(react-dom@19.0.0(react@19.0.0))(react@19.0.0)
       geist:
         specifier: 1.3.1
         version: 1.3.1(next@15.1.3(react-dom@19.0.0(react@19.0.0))(react@19.0.0))
@@ -158,6 +161,9 @@ importers:
       tailwind-merge:
         specifier: 2.5.5
         version: 2.5.5
+      three:
+        specifier: 0.171.0
+        version: 0.171.0
       zod:
         specifier: 3.25.76
         version: 3.25.76
@@ -174,6 +180,9 @@ importers:
       '@types/react-dom':
         specifier: 19.0.2
         version: 19.0.2(@types/react@19.0.2)
+      '@types/three':
+        specifier: 0.171.0
+        version: 0.171.0
       postcss:
         specifier: 8.4.49
         version: 8.4.49
@@ -1317,6 +1326,9 @@ packages:
   '@tailwindcss/postcss@4.0.0-beta.7':
     resolution: {integrity: sha512-w7FyhQwymcWMyzyCj8nsNq3ImIurGbwujcEOtQhnX5gf3g8N2bH3EAq5+pk6Y0j4+HK37m1pIJ4lnULRkE66YQ==}
 
+  '@tweenjs/tween.js@23.1.3':
+    resolution: {integrity: sha512-vJmvvwFxYuGnF2axRtPYocag6Clbb5YS7kLL+SO/TeVFzHqDIWrNKYtcsPMibjDx9O+bu+psAy9NKfWklassUA==}
+
   '@types/estree@1.0.9':
     resolution: {integrity: sha512-GhdPgy1el4/ImP05X05Uw4cw2/M93BCUmnEvWZNStlCzEKME4Fkk+YpoA5OiHNQmoS7Cafb8Xa3Pya8m1Qrzeg==}
 
@@ -1340,6 +1352,15 @@ packages:
   '@types/react@19.0.2':
     resolution: {integrity: sha512-USU8ZI/xyKJwFTpjSVIrSeHBVAGagkHQKPNbxeWwql/vDmnTIBgx+TJnhFnj1NXgz8XfprU0egV2dROLGpsBEg==}
 
+  '@types/stats.js@0.17.4':
+    resolution: {integrity: sha512-jIBvWWShCvlBqBNIZt0KAshWpvSjhkwkEu4ZUcASoAvhmrgAUI2t1dXrjSL4xXVLB4FznPrIsX3nKXFl/Dt4vA==}
+
+  '@types/three@0.171.0':
+    resolution: {integrity: sha512-oLuT1SAsT+CUg/wxUTFHo0K3NtJLnx9sJhZWQJp/0uXqFpzSk1hRHmvWvpaAWSfvx2db0lVKZ5/wV0I0isD2mQ==}
+
+  '@types/webxr@0.5.24':
+    resolution: {integrity: sha512-h8fgEd/DpoS9CBrjEQXR+dIDraopAEfu4wYVNY2tEPwk60stPWhvZMf4Foo5FakuQ7HFZoa8WceaWFervK2Ovg==}
+
   '@types/yauzl@2.10.3':
     resolution: {integrity: sha512-oJoftv0LSuaDZE3Le4DbKX+KS9G36NzOeSap90UIK0yMA/NhKJhqlSGtNDORNRaIbQfzjXDrQa0ytJ6mNRGz/Q==}
 
@@ -1388,6 +1409,9 @@ packages:
   '@webassemblyjs/wast-printer@1.14.1':
     resolution: {integrity: sha512-kPSSXE6De1XOR820C90RIo2ogvZG+c3KiHzqUoO/F34Y2shGzesfqv7o57xrxovZJH/MetF5UjroJ/R/3isoiw==}
 
+  '@webgpu/types@0.1.70':
+    resolution: {integrity: sha512-LFiNHHKMvmAEvwVew3JLJmTdShhbdwRFSImUshGhE2mGE8ybQzIo63l5uRp+YKnNx+8Qno8Kf6gN+DKMreIJCA==}
+
   '@xtuc/ieee754@1.2.0':
     resolution: {integrity: sha512-DX8nKgqcGwsc0eJSqYt5lwP4DH5FlHnmuWWBRy7X0NcaGR0ZtuyeESgMwTYVEtxmsNGY+qit4QYT/MIYTOTPeA==}
 
@@ -1898,6 +1922,9 @@ packages:
   fd-slicer@1.1.0:
     resolution: {integrity: sha512-cE1qsB/VwyQozZ+q1dGxR8LBYNZeofhEdUNGSMbQD3Gw2lAzX9Zb3uIU6Ebc/Fmyjo9AWWfnn0AUCHqtevs/8g==}
 
+  fflate@0.8.3:
+    resolution: {integrity: sha512-tbZNuJrLwGUp3zshBtdy4W+ORxZuIh8a5ilyIEQDC5rY1f3U20JMry0Ll3WBzU58EZKsEuJFXhb5gwv8CsPvgA==}
+
   finalhandler@2.1.1:
     resolution: {integrity: sha512-S8KoZgRZN+a5rNwqTxlZZePjT/4cnm0ROV70LedRHZ0p8u9fRID0hJUZQpkKLzro8LfmC8sx23bY6tVNxv8pQA==}
     engines: {node: '>= 18.0.0'}
@@ -1921,6 +1948,20 @@ packages:
     resolution: {integrity: sha512-buRG0fpBtRHSTCOASe6hD258tEubFoRLb4ZNA6NxMVHNw2gOcwHo9wyablzMzOA5z9xA9L1KNjk/Nt6MT9aYow==}
     engines: {node: '>= 0.6'}
 
+  framer-motion@11.18.2:
+    resolution: {integrity: sha512-5F5Och7wrvtLVElIpclDT0CBzMVg3dL22B64aZwHtsIY8RB4mXICLrkajK4G9R+ieSAGcgrLeae2SeUTg2pr6w==}
+    peerDependencies:
+      '@emotion/is-prop-valid': '*'
+      react: ^18.0.0 || ^19.0.0
+      react-dom: ^18.0.0 || ^19.0.0
+    peerDependenciesMeta:
+      '@emotion/is-prop-valid':
+        optional: true
+      react:
+        optional: true
+      react-dom:
+        optional: true
+
   fresh@2.0.0:
     resolution: {integrity: sha512-Rx/WycZ60HOaqLKAi6cHRKKI7zxWbJ31MhntmtwMoaTeF7XFH9hhBp8vITaMidfljRQ6eYWCKkaTK+ykVJHP2A==}
     engines: {node: '>= 0.8'}
@@ -2208,6 +2249,9 @@ packages:
   merge-stream@2.0.0:
     resolution: {integrity: sha512-abv/qOcuPfk3URPfDzmZU1LKmuw8kT+0nIHvKrKgFrwifol/doWcdA4ZqsWQ8ENrFKkd67Mfpo/LovbIUsbt3w==}
 
+  meshoptimizer@0.18.1:
+    resolution: {integrity: sha512-ZhoIoL7TNV4s5B6+rx5mC//fw8/POGyNxS/DZyCJeiZ12ScLfVwRE/GfsxwiTkMYYD5DmK2/JXnEVXqL4rF+Sw==}
+
   mime-db@1.52.0:
     resolution: {integrity: sha512-sPU4uV7dYlvtWJxwwxHD0PuihVNiE7TyAbQ5SWxDCB9mUYvOgroQOwYQQOKPJ8CIbE+1ETVlOoK1UC2nU3gYvg==}
     engines: {node: '>= 0.6'}
@@ -2234,6 +2278,12 @@ packages:
   mnemonist@0.39.8:
     resolution: {integrity: sha512-vyWo2K3fjrUw8YeeZ1zF0fy6Mu59RHokURlld8ymdUPjMlD9EC9ov1/YPqTgqRvUN9nTr3Gqfz29LYAmu0PHPQ==}
 
+  motion-dom@11.18.1:
+    resolution: {integrity: sha512-g76KvA001z+atjfxczdRtw/RXOM3OMSdd1f4DL77qCTF/+avrRJiawSG4yDibEQ215sr9kpinSlX2pCTJ9zbhw==}
+
+  motion-utils@11.18.1:
+    resolution: {integrity: sha512-49Kt+HKjtbJKLtgO/LKj9Ld+6vw9BjH5d9sc40R/kVyH8GLAXgT42M2NnuPcJNuA3s9ZfZBUcwIgpmZWGEE+hA==}
+
   ms@2.1.3:
     resolution: {integrity: sha512-6FlzubTLZG3J2a/NVCAleEhjzq5oxgHyaCU9yYXvcLsvoVaHJq/s5xXI6/XXP6tz7R9xAOtHnSO/tXtF3WRTlA==}
 
@@ -2738,6 +2788,9 @@ packages:
   thread-stream@3.1.0:
     resolution: {integrity: sha512-OqyPZ9u96VohAyMfJykzmivOrY2wfMSf3C5TtFJVgN+Hm6aj+voFhlK+kZEIv2FBh1X6Xp3DlnCOfEQ3B2J86A==}
 
+  three@0.171.0:
+    resolution: {integrity: sha512-Y/lAXPaKZPcEdkKjh0JOAHVv8OOnv/NDJqm0wjfCzyQmfKxV7zvkwsnBgPBKTzJHToSOhRGQAGbPJObT59B/PQ==}
+
   tiny-invariant@1.3.3:
     resolution: {integrity: sha512-+FbBPE1o9QAYvviau/qC5SE3caw21q3xkvWKBtja5vgqOWIHHJ3ioaq1VPfn/Szqctz2bU/oYeKd9/z5BL+PVg==}
 
@@ -3718,6 +3771,8 @@ snapshots:
       postcss: 8.4.49
       tailwindcss: 4.0.0-beta.7
 
+  '@tweenjs/tween.js@23.1.3': {}
+
   '@types/estree@1.0.9': {}
 
   '@types/json-schema@7.0.15': {}
@@ -3743,6 +3798,19 @@ snapshots:
     dependencies:
       csstype: 3.2.3
 
+  '@types/stats.js@0.17.4': {}
+
+  '@types/three@0.171.0':
+    dependencies:
+      '@tweenjs/tween.js': 23.1.3
+      '@types/stats.js': 0.17.4
+      '@types/webxr': 0.5.24
+      '@webgpu/types': 0.1.70
+      fflate: 0.8.3
+      meshoptimizer: 0.18.1
+
+  '@types/webxr@0.5.24': {}
+
   '@types/yauzl@2.10.3':
     dependencies:
       '@types/node': 22.10.2
@@ -3824,6 +3892,8 @@ snapshots:
       '@webassemblyjs/ast': 1.14.1
       '@xtuc/long': 4.2.2
 
+  '@webgpu/types@0.1.70': {}
+
   '@xtuc/ieee754@1.2.0': {}
 
   '@xtuc/long@4.2.2': {}
@@ -4362,6 +4432,8 @@ snapshots:
     dependencies:
       pend: 1.2.0
 
+  fflate@0.8.3: {}
+
   finalhandler@2.1.1:
     dependencies:
       debug: 4.4.3
@@ -4396,6 +4468,15 @@ snapshots:
 
   forwarded@0.2.0: {}
 
+  framer-motion@11.18.2(react-dom@19.0.0(react@19.0.0))(react@19.0.0):
+    dependencies:
+      motion-dom: 11.18.1
+      motion-utils: 11.18.1
+      tslib: 2.8.1
+    optionalDependencies:
+      react: 19.0.0
+      react-dom: 19.0.0(react@19.0.0)
+
   fresh@2.0.0: {}
 
   fs-monkey@1.0.3: {}
@@ -4633,6 +4714,8 @@ snapshots:
 
   merge-stream@2.0.0: {}
 
+  meshoptimizer@0.18.1: {}
+
   mime-db@1.52.0: {}
 
   mime-db@1.54.0: {}
@@ -4653,6 +4736,12 @@ snapshots:
     dependencies:
       obliterator: 2.0.5
 
+  motion-dom@11.18.1:
+    dependencies:
+      motion-utils: 11.18.1
+
+  motion-utils@11.18.1: {}
+
   ms@2.1.3: {}
 
   msgpackr-extract@3.0.3:
@@ -5127,6 +5216,8 @@ snapshots:
     dependencies:
       real-require: 0.2.0
 
+  three@0.171.0: {}
+
   tiny-invariant@1.3.3: {}
 
   toad-cache@3.7.1: {}