feat: filter empty projects from public gallery (#125)

* feat(community): filter empty projects from public gallery

Add is_empty column to projects table so the public gallery only shows
projects with actual content. Scene graph emptiness is computed on save
and on creation, and a backfill migration marks existing non-empty
projects. Also cleans up import ordering, fixes README migration path,
and removes stale feedback table migration.

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

* Use ESNext modules and bundler resolution

Update packages/db tsconfig to emit ESNext modules and use 'bundler' moduleResolution. This enables modern ESM output and bundler-style resolution for the db package (keeps outDir and rootDir unchanged).

* feat(editor): add dark mode theme and grid visibility toggle

Add theme state to viewer store with light/dark modes, dark-aware
lighting and background colors, grid show/hide toggle in settings,
and theme toggle buttons in the sidebar.

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

* Add ground occluder, animated lighting & UI tweaks

Introduce a ground occluder and smoother animated lighting while adjusting editor UI and icons. Viewer: add GroundOccluder (uses polygon-clipping to union slab/zone polygons) and AnimatedBackground, integrate both into the Canvas; improve Lights to interpolate intensities/colors/ambient for smooth theme transitions. Editor: refactor sidebar header to support inline project title editing and move the theme toggle; replace some lucide icons with image assets and add a settings icon (apps/editor/public/icons/settings.png). Also add polygon-clipping to the viewer package dependencies.

* Update dark mode background color and clean up imports

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

---------

Co-authored-by: Claude Opus 4.6 <noreply@anthropic.com>

bun.lock

@@ -174,6 +174,7 @@
       "name": "@pascal-app/viewer",
       "version": "0.1.13",
       "dependencies": {
+        "polygon-clipping": "^0.15.7",
         "zustand": "^5",
       },
       "devDependencies": {
@@ -1314,6 +1315,8 @@
 
     "picomatch": ["picomatch@2.3.1", "", {}, "sha512-JU3teHTNjmE2VCGFzuY8EXzCDVwEqB2a8fsIvwaStHhAWJEeVd1o1QD80CU6+ZdEXXSLbSsuLwJjkCBWqRQUVA=="],
 
+    "polygon-clipping": ["polygon-clipping@0.15.7", "", { "dependencies": { "robust-predicates": "^3.0.2", "splaytree": "^3.1.0" } }, "sha512-nhfdr83ECBg6xtqOAJab1tbksbBAOMUltN60bU+llHVOL0e5Onm1WpAXXWXVB39L8AJFssoIhEVuy/S90MmotA=="],
+
     "portless": ["portless@0.4.2", "", { "dependencies": { "chalk": "^5.3.0" }, "os": [ "linux", "darwin", ], "bin": { "portless": "dist/cli.js" } }, "sha512-/G3jIeD1XokoO9KY/lUGTV9irKz3tgx8yqHkz+hvj/86QeR219GvYFB+QEfpvjRlvvLVJa5vE7BkRfBZBe/lQg=="],
 
     "possible-typed-array-names": ["possible-typed-array-names@1.1.0", "", {}, "sha512-/+5VFTchJDoVj3bhoqi6UeymcD00DAwb1nJwamzPvHEszJ4FpF6SNNbUbOS8yI56qHzdV8eK0qEfOSiodkTdxg=="],
@@ -1388,6 +1391,8 @@
 
     "reusify": ["reusify@1.1.0", "", {}, "sha512-g6QUff04oZpHs0eG5p83rFLhHeV00ug/Yf9nZM6fLeUrPguBTkTQOdpAWWspMh55TZfVQDPaN3NQJfbVRAxdIw=="],
 
+    "robust-predicates": ["robust-predicates@3.0.2", "", {}, "sha512-IXgzBWvWQwE6PrDI05OvmXUIruQTcoMDzRsOd5CDvHCVLcLHMTSYvOK5Cm46kWqlV3yAbuSpBZdJ5oP5OUoStg=="],
+
     "rou3": ["rou3@0.7.12", "", {}, "sha512-iFE4hLDuloSWcD7mjdCDhx2bKcIsYbtOTpfH5MHHLSKMOUyjqQXTeZVa289uuwEGEKFoE/BAPbhaU4B774nceg=="],
 
     "run-parallel": ["run-parallel@1.2.0", "", { "dependencies": { "queue-microtask": "^1.2.2" } }, "sha512-5l4VyZR86LZ/lDxZTR6jqL8AFE2S0IFLMP26AbjsLVADxHdhB/c0GUsH+y39UfCi3dzz8OlQuPmnaJOMoDHQBA=="],
@@ -1438,6 +1443,8 @@
 
     "source-map-support": ["source-map-support@0.5.21", "", { "dependencies": { "buffer-from": "^1.0.0", "source-map": "^0.6.0" } }, "sha512-uBHU3L3czsIyYXKX88fdrGovxdSCoTGDRZ6SYXtSRxLZUzHg5P/66Ht6uoUlHu9EZod+inXhKo3qQgwXUT/y1w=="],
 
+    "splaytree": ["splaytree@3.2.3", "", {}, "sha512-7OXrNWzy6CK+r7Ch9OLPBDTKfB6XlWHjX4P0RU5B3IgFuWPeYN0XtRtlexGRjgbQxpfaUve6jTAwBGWuGntz/w=="],
+
     "split2": ["split2@4.2.0", "", {}, "sha512-UcjcJOWknrNkF6PLX83qcHM6KHgVKNkV62Y8a5uYDVv9ydGQVwAHMKqHdJje1VTWpljG0WYpCDhrCdAOYH4TWg=="],
 
     "stats-gl": ["stats-gl@2.4.2", "", { "dependencies": { "@types/three": "*", "three": "^0.170.0" } }, "sha512-g5O9B0hm9CvnM36+v7SFl39T7hmAlv541tU81ME8YeSb3i1CIP5/QdDeSB3A0la0bKNHpxpwxOVRo2wFTYEosQ=="],