Add journey and social card review evidence

Author: adewale

docs/pr-evidence/README.md

@@ -1,11 +1,15 @@
 # PR #6 visual evidence
 
-These captures show `/examples/values` at a 1200×900 desktop viewport, clipped to the `.playground` runner. The review point is the Run control: the PR changes its action color from `#FF4801` to the WCAG-AA `#C83800` while preserving the editor/output layout.
+These artifacts provide reviewable evidence for the runner, journey-page, and social-card changes.
 
-| Capture | Commit | SHA-256 |
-| --- | --- | --- |
-| [Before](pr-6-before-runner.png) | `b61edf1` (`origin/main`) | `be773336d14f1b819ade1a22f6308573b5e26148ec37b322f73ad1d2de232b34` |
-| [After](pr-6-after-runner.png) | `742ae7d` | `281db8bb44daa94af2d99b689b1177fb21427b0051679a3e1de3a56bc4831b04` |
+| Evidence | Review point | Commit | SHA-256 |
+| --- | --- | --- | --- |
+| [Runner before](pr-6-before-runner.png) | `/examples/values` uses the prior bright `#FF4801` Run control. | `b61edf1` (`origin/main`) | `be773336d14f1b819ade1a22f6308573b5e26148ec37b322f73ad1d2de232b34` |
+| [Runner after](pr-6-after-runner.png) | The same runner keeps its editor/output layout while using the WCAG-AA `#C83800` action color. | `742ae7d` | `281db8bb44daa94af2d99b689b1177fb21427b0051679a3e1de3a56bc4831b04` |
+| [Runtime journey page](pr-6-journey-runtime.png) | `/journeys/runtime` renders its overview, first learning outcome, figure, and linked examples at a 1200×1260 desktop viewport. | `a85bbf7` | `eb1db35d5ff7fc7974ad3a3891b694aaa5f8f277ba291b94a24c62767340e04d` |
+| [`/journeys` social card](../../public/og/journeys.jpg) | The exact 1200×630 JPEG referenced by the `/journeys` `og:image` tag. | `a85bbf7` | `3042997bb2b3acd9e2ab74106f5b4d3d4c58dafcfe23f1ddc548ed39e4548a3c` |
+
+`public/og/journeys.jpg` is a tracked PR artifact and its deterministic HTML input is recorded in `public/og/manifest.json`. `make check-social-cards` verifies both its provenance and the exact 118-card JPEG set.
 
 Regenerate each page with its commit checked out, serve the rendered `/examples/values` HTML plus `public/` on a local HTTP server, then run: