Initial HerbAPI implementation

Rust/Axum REST API (herbapi-api) with PostgreSQL, S3/Garage, OIDC auth.
Dioxus 0.7 WASM frontend (herbapi-ui) with sidebar layout and botanical reference style.
9 SQL migrations covering families, species, cultivars, suppliers, companions, images, users, API tokens.

herbapi-api/migrations/001_create_families.sql

@@ -0,0 +1,16 @@
+CREATE TABLE families (
+    id          UUID PRIMARY KEY DEFAULT gen_random_uuid(),
+    slug        TEXT NOT NULL UNIQUE,
+    name_scientific TEXT NOT NULL,
+    name_en     TEXT,
+    name_de     TEXT,
+    description TEXT,
+    created_at  TIMESTAMPTZ NOT NULL DEFAULT NOW(),
+    updated_at  TIMESTAMPTZ NOT NULL DEFAULT NOW()
+);
+
+CREATE INDEX idx_families_search ON families
+    USING GIN (to_tsvector('english',
+        coalesce(name_scientific,'') || ' ' ||
+        coalesce(name_en,'') || ' ' ||
+        coalesce(name_de,'')));