feat(topology): seed diagram presentation styles

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

topology_api/migrations/006_presentation_styles.sql

@@ -0,0 +1,95 @@
+-- topology_api/migrations/006_presentation_styles.sql
+-- Database-driven presentation semantics for topology diagrams.
+
+CREATE TABLE IF NOT EXISTS topology.diagram_themes (
+    id uuid PRIMARY KEY DEFAULT gen_random_uuid(),
+    base_id uuid NOT NULL REFERENCES topology.bases(id) ON DELETE CASCADE,
+    theme_key text NOT NULL,
+    name text NOT NULL,
+    description text,
+    tokens jsonb NOT NULL DEFAULT '{}'::jsonb,
+    is_default boolean NOT NULL DEFAULT false,
+    created_at timestamptz NOT NULL DEFAULT now(),
+    updated_at timestamptz NOT NULL DEFAULT now(),
+    CONSTRAINT uq_diagram_themes_base_key UNIQUE (base_id, theme_key)
+);
+
+CREATE UNIQUE INDEX IF NOT EXISTS uq_diagram_themes_default_per_base
+    ON topology.diagram_themes(base_id)
+    WHERE is_default;
+
+CREATE TABLE IF NOT EXISTS topology.diagram_node_styles (
+    id uuid PRIMARY KEY DEFAULT gen_random_uuid(),
+    theme_id uuid NOT NULL REFERENCES topology.diagram_themes(id) ON DELETE CASCADE,
+    style_key text NOT NULL,
+    display_name text NOT NULL,
+    fill_color text NOT NULL,
+    stroke_color text NOT NULL,
+    stroke_width numeric NOT NULL,
+    corner_radius numeric NOT NULL DEFAULT 16,
+    title_color text,
+    meta_color text,
+    hint_color text,
+    created_at timestamptz NOT NULL DEFAULT now(),
+    updated_at timestamptz NOT NULL DEFAULT now(),
+    CONSTRAINT uq_diagram_node_styles_theme_key UNIQUE (theme_id, style_key),
+    CONSTRAINT ck_diagram_node_stroke_width CHECK (stroke_width >= 0),
+    CONSTRAINT ck_diagram_node_corner_radius CHECK (corner_radius >= 0)
+);
+
+CREATE TABLE IF NOT EXISTS topology.diagram_edge_styles (
+    id uuid PRIMARY KEY DEFAULT gen_random_uuid(),
+    theme_id uuid NOT NULL REFERENCES topology.diagram_themes(id) ON DELETE CASCADE,
+    connection_type text NOT NULL,
+    display_name text NOT NULL,
+    stroke_color text NOT NULL,
+    stroke_width numeric NOT NULL,
+    dash_array text,
+    line_cap text NOT NULL DEFAULT 'square',
+    legend_group text,
+    legend_order integer NOT NULL DEFAULT 0,
+    created_at timestamptz NOT NULL DEFAULT now(),
+    updated_at timestamptz NOT NULL DEFAULT now(),
+    CONSTRAINT uq_diagram_edge_styles_theme_type UNIQUE (theme_id, connection_type),
+    CONSTRAINT ck_diagram_edge_stroke_width CHECK (stroke_width >= 0),
+    CONSTRAINT ck_diagram_edge_line_cap CHECK (line_cap IN ('butt', 'round', 'square')),
+    CONSTRAINT ck_diagram_edge_dash_array CHECK (
+        dash_array IS NULL OR dash_array ~ '^[0-9]+( [0-9]+)*$'
+    )
+);
+
+CREATE TABLE IF NOT EXISTS topology.diagram_decoration_styles (
+    id uuid PRIMARY KEY DEFAULT gen_random_uuid(),
+    theme_id uuid NOT NULL REFERENCES topology.diagram_themes(id) ON DELETE CASCADE,
+    decoration_key text NOT NULL,
+    display_name text NOT NULL,
+    fill_color text NOT NULL,
+    stroke_color text NOT NULL,
+    stroke_width numeric NOT NULL,
+    label text,
+    label_color text,
+    render_params jsonb NOT NULL DEFAULT '{}'::jsonb,
+    legend_order integer NOT NULL DEFAULT 0,
+    created_at timestamptz NOT NULL DEFAULT now(),
+    updated_at timestamptz NOT NULL DEFAULT now(),
+    CONSTRAINT uq_diagram_decoration_styles_theme_key UNIQUE (theme_id, decoration_key),
+    CONSTRAINT ck_diagram_decoration_stroke_width CHECK (stroke_width >= 0)
+);
+
+CREATE TABLE IF NOT EXISTS topology.diagram_legend_items (
+    id uuid PRIMARY KEY DEFAULT gen_random_uuid(),
+    theme_id uuid NOT NULL REFERENCES topology.diagram_themes(id) ON DELETE CASCADE,
+    legend_key text NOT NULL,
+    label text NOT NULL,
+    item_type text NOT NULL,
+    style_ref text NOT NULL,
+    display_order integer NOT NULL DEFAULT 0,
+    is_visible boolean NOT NULL DEFAULT true,
+    created_at timestamptz NOT NULL DEFAULT now(),
+    updated_at timestamptz NOT NULL DEFAULT now(),
+    CONSTRAINT uq_diagram_legend_items_theme_key UNIQUE (theme_id, legend_key),
+    CONSTRAINT ck_diagram_legend_item_type CHECK (item_type IN ('edge', 'decoration', 'node'))
+);
+
+ALTER TABLE topology.diagram_layouts
+    ADD COLUMN IF NOT EXISTS theme_id uuid REFERENCES topology.diagram_themes(id);