Install Livewire Material's Boost guideline and skill, and record rules

The scheme is regenerated, never hand-edited; the download page stays
free of anchored components; the theme key stays sealshare-theme.

Co-Authored-By: Claude Opus 5 (1M context) <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01V9NnLxnPp8vaaurb3Z1MFy

.ai/rules/config.md

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+---
+paths:
+  - config/livewire-material.php
+---
+
+# Config
+
+## Theme storage key is sealshare-theme
+The theme is stored in localStorage under `sealshare-theme` (default `system`). `mary-theme` stays in `theme.legacy_keys` so visitors from 1.x keep their choice once; don't rename the key or drop the legacy entry, or every returning visitor's theme resets.

.ai/rules/css.md

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+---
+paths:
+  - 'resources/css/material-scheme.*'
+---
+
+# Css
+
+## Regenerate the colour scheme, never hand-edit it
+material-scheme.css and material-scheme.json are generated together by `php artisan material:scheme "#4f46e5" --variant=vibrant` (Vibrant was chosen over Tonal Spot, which read washed out on the indigo seed). The JSON colours the Markdown mail theme and the fallback error pages, so a hand edit to the CSS alone leaves them out of step. Change the seed or variant and rerun the command instead.

.ai/rules/index.md

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+# Project Rules Index
+
+Before planning or editing, find the row whose globs match the file's path and read that rule file.
+
+| Applies to | Rule file |
+| --- | --- |
+| config/livewire-material.php | .ai/rules/config.md |
+| resources/css/material-scheme.* | .ai/rules/css.md |
+| resources/views/livewire/share-download.blade.php | .ai/rules/livewire.md |

.ai/rules/livewire.md

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+---
+paths:
+  - resources/views/livewire/share-download.blade.php
+---
+
+# Livewire
+
+## No anchored components on the download page
+Recipients open share links on any phone, including iOS Safari below 18.4, where CSS anchor positioning is missing. Keep menus, tooltips, selects-as-menus, datepickers and other anchored/popover components off this page; use plain buttons with aria-label and native controls. tests/Browser/SealShareTest.php checks the page at 393px has no popovers.