chore: stage all in-progress work before repo split

Web app: new entities (Image, RenderedAsset, SharedImage, Token,
DeviceImageHistory), enums, repositories, controllers, message handlers,
migrations, tests, frontend upload/library/sticker UI, Vue components.

Firmware: EPD background screen binaries + gen scripts, setup_bg header.

Infra: ddev config, test bundle, gitignore coverage dir.

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

public/build/assets/BaseBottomSheet-MPNarQ8K.css

@@ -0,0 +1 @@
+.btn[data-v-7d3f1e61]{justify-content:center;align-items:center;gap:var(--space-2);min-height:var(--touch-min);padding:0 var(--space-5);border-radius:var(--radius-full);font-family:var(--font-family);font-size:var(--text-base);cursor:pointer;transition:opacity var(--duration-fast) var(--ease-out), transform var(--duration-fast) var(--ease-out);white-space:nowrap;border:none;font-weight:600;line-height:1;text-decoration:none;display:inline-flex}.btn[data-v-7d3f1e61]:disabled{opacity:.4;cursor:not-allowed}.btn[data-v-7d3f1e61]:not(:disabled):active{transform:scale(.96)}.btn--primary[data-v-7d3f1e61]{background:var(--color-primary);color:var(--color-primary-fg)}.btn--secondary[data-v-7d3f1e61]{background:var(--color-secondary);color:var(--color-secondary-fg);border:1px solid var(--color-border)}.btn--ghost[data-v-7d3f1e61]{color:var(--color-text);border:1px solid var(--color-border);background:0 0}.btn--destructive[data-v-7d3f1e61]{background:var(--color-destructive);color:var(--color-destructive-fg)}.btn--icon-pill[data-v-7d3f1e61]{width:var(--touch-min);border-radius:var(--radius-full);background:var(--color-surface-2);color:var(--color-text);padding:0}.btn__spinner[data-v-7d3f1e61]{border:2px solid;border-top-color:#0000;border-radius:50%;width:16px;height:16px;animation:.7s linear infinite spin-7d3f1e61}@keyframes spin-7d3f1e61{to{transform:rotate(360deg)}}.sheet-overlay[data-v-81ce2dd1]{z-index:100;background:#0006;align-items:flex-end;display:flex;position:fixed;inset:0}.sheet[data-v-81ce2dd1]{background:var(--color-surface);border-radius:var(--radius-lg) var(--radius-lg) 0 0;width:100%;padding:var(--space-3) var(--space-4) var(--space-6);outline:none;max-height:90dvh;overflow-y:auto}.sheet__handle[data-v-81ce2dd1]{border-radius:var(--radius-full);background:var(--color-border);width:36px;height:4px;margin:0 auto var(--space-4)}.sheet-enter-active .sheet-overlay[data-v-81ce2dd1]{transition:background var(--duration-base) var(--ease-out)}.sheet-enter-active .sheet[data-v-81ce2dd1]{transition:transform .25s var(--ease-out)}.sheet-leave-active .sheet[data-v-81ce2dd1]{transition:transform .2s ease-in}.sheet-leave-active[data-v-81ce2dd1]{transition:background .2s ease-in}.sheet-enter-from[data-v-81ce2dd1]{background:0 0}.sheet-enter-from .sheet[data-v-81ce2dd1]{transform:translateY(100%)}.sheet-leave-to[data-v-81ce2dd1]{background:0 0}.sheet-leave-to .sheet[data-v-81ce2dd1]{transform:translateY(100%)}