feat(filter): tag chips + FTS5 search en toolbar (issue 0009)
- entity_ops: entity_search_fts (bm25, prefix tokens) + entity_list_by_tags (AND).
- AppState: filter_query_buf, filter_tags, filter_mode (highlight/hide), hits cache.
- views_filter_apply: combina tipos visibles + match-set (FTS query AND tags),
highlight = color_override con alpha=0x40, hide = clear NF_VISIBLE.
- toolbar: input search + dropdown (max 20, click centra y selecciona),
chips de tags con boton X, input para anadir tag, combo Highlight/Hide,
Clear filter.
- Inspector: right-click sobre tag chip lo anade al filtro.
- main.cpp: reapply en cada frame si filter_dirty; cam_x/y al focus_target.
egutierrez
54aba71bf5