feat(home): redesign dashboard with spool list and low stock alerts

Replaces stat card layout with functional dashboard:
- Prominent spool count with "Add Spool" button
- Paginated list of all spools sorted by last used
- Low stock alert badge (< 100g threshold)
- Color swatch, name, material, and remaining weight columns
- Clickable rows navigate to spool detail
- Secondary stats for filaments and vendors

Closes #12

Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>

client/public/locales/en/common.json

@@ -33,7 +33,8 @@
         "no": "No",
         "notAccessTitle": "You don't have permission to access",
         "hideColumns": "Hide Columns",
-        "clearFilters": "Clear Filters"
+        "clearFilters": "Clear Filters",
+        "viewAll": "View All"
     },
     "warnWhenUnsavedChanges": "Are you sure you want to leave? You have unsaved changes.",
     "notifications": {
@@ -324,7 +325,10 @@
     "home": {
         "home": "Home",
         "welcome": "Welcome to your Spoolman instance!",
-        "description": "It looks like you haven't added any spools yet. See the <helpPageLink>Help page</helpPageLink> for help getting started."
+        "description": "It looks like you haven't added any spools yet. See the <helpPageLink>Help page</helpPageLink> for help getting started.",
+        "all_spools": "All Spools",
+        "low_stock_alert": "{{count}} spools below {{threshold}}g",
+        "low_stock_warning": "Low stock"
     },
     "help": {
         "help": "Help",