Add glimpse image check workflow

.github/workflows/glimpse.yml

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+name: Glimpse
+
+on:
+  push:
+    branches: [main]
+  pull_request:
+
+permissions:
+  contents: read
+
+jobs:
+  check-images:
+    runs-on: ubuntu-latest
+    env:
+      GLIMPSE_TOKEN: ${{ secrets.GLIMPSE_TOKEN }}
+    steps:
+      - uses: actions/checkout@v6
+      - name: Install glimpse
+        run: |
+          composer global require --no-interaction --no-progress mathiasgrimm/glimpse-cli
+          composer global config bin-dir --absolute --quiet >> "$GITHUB_PATH"
+      - name: Check images
+        if: env.GLIMPSE_TOKEN != ''
+        run: glimpse check .
+      - name: Skipped (no token)
+        if: env.GLIMPSE_TOKEN == ''
+        run: echo "::warning::GLIMPSE_TOKEN is not available (fork PR, or the secret is not set); image check skipped."

.glimpse-baseline.json

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+{
+    "_readme": [
+        "Images already handled by glimpse: check and analyze skip a file while its size and xxh128 content hash still match its entry.",
+        "via records the operation that wrote the entry: analyze means accepted as-is by --update-baseline, optimize means the optimizer chain ran (the optimize command or any transform's --optimize flag), and other values name the command that produced the file.",
+        "This file is @generated by glimpse and rewritten on every update; do not edit by hand. See https://glimpseimg.com/docs/cli/project-setup#glimpse-baselinejson"
+    ],
+    "files": {
+        "art/banner.avif": {
+            "size": 41062,
+            "xxh128": "b32bd37e614d1dc703cbe37f0e259cd7",
+            "via": "analyze"
+        }
+    }
+}

.glimpseignore

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+# Created by glimpse init. Paths listed here are excluded from glimpse
+# scans (check, analyze), using gitignore syntax relative to this file.
+
+# Dependencies you do not control
+vendor/
+node_modules/
+
+# Generated and built assets
+public/build/
+dist/
+
+# Runtime state and user uploads (Laravel)
+storage/
+
+# Favicons and touch icons: tiny and format-constrained, not worth optimizing
+favicon.ico
+favicon*.png
+apple-touch-icon*.png