feat: gallery + generic blueprint viewer, add Grid blueprint

Refactor the List-specific screen into a data-driven, reusable viewer:
- generic Blueprint type + shared LoadState machine + registry
- vue-router: / (gallery) and /b/:slug (illustration)
- BlueprintViewer renders any blueprint; specimens stay bespoke
- add Grid blueprint (6 functions incl. Position) + GridSpecimen

src/components/CompositionMap.vue

@@ -1,6 +1,8 @@
 <script setup lang="ts">
 import { computed } from "vue"
-import { COMP_CAPS, COMP_FUNCS, COMP_LINKS } from "@/data/listBlueprint"
+import type { Composition } from "@/data/blueprint"
+
+const props = defineProps<{ composition: Composition }>()
 
 const PAL = {
   boxFill: "#103763",
@@ -20,27 +22,29 @@ const bh = 34
 const top = 16
 const lstep = 40
 const rstep = 52
-const H = top + COMP_CAPS.length * lstep + 16
 
 const capY = (i: number) => top + i * lstep + bh / 2
 const funcY = (i: number) => top + i * rstep + bh / 2
 
+const H = computed(() => top + props.composition.caps.length * lstep + 16)
+
 const capIndex = computed(
-  () => Object.fromEntries(COMP_CAPS.map((c, i) => [c.id, i])) as Record<string, number>,
+  () =>
+    Object.fromEntries(props.composition.caps.map((c, i) => [c.id, i])) as Record<string, number>,
 )
 const funcIndex = computed(
-  () => Object.fromEntries(COMP_FUNCS.map((f, i) => [f, i])) as Record<string, number>,
+  () => Object.fromEntries(props.composition.funcs.map((f, i) => [f, i])) as Record<string, number>,
 )
 
 const leftBoxes = computed(() =>
-  COMP_CAPS.map((c, i) => ({ ...c, x: lx, y: capY(i) - bh / 2, w: lw, h: bh })),
+  props.composition.caps.map((c, i) => ({ ...c, x: lx, y: capY(i) - bh / 2, w: lw, h: bh })),
 )
 const rightBoxes = computed(() =>
-  COMP_FUNCS.map((f, i) => ({ label: f, x: rx, y: funcY(i) - bh / 2, w: rw, h: bh })),
+  props.composition.funcs.map((f, i) => ({ label: f, x: rx, y: funcY(i) - bh / 2, w: rw, h: bh })),
 )
 
 const edges = computed(() =>
-  COMP_LINKS.map(([a, b]) => {
+  props.composition.links.map(([a, b]) => {
     const y1 = capY(capIndex.value[a])
     const y2 = funcY(funcIndex.value[b])
     const x1 = lx + lw