feat(canvas): raise switch port cap to 64, add port numbers and fibre edge type

Issue #20: bump MAX_BOTTOM_HANDLES 48 -> 64 (covers 48+4 SFP switches) and add
a per-node "Show Port Numbers" toggle that labels each bottom connection point.

Issue #21: add `fibre` as a first-class edge/connection type (bright cyan with a
subtle glow) alongside ethernet/wifi/iot/vlan/virtual/cluster - selectable in the
edge modal, themeable, registered in the React Flow edgeTypes registry, and
round-tripped through YAML import/export.

Backport of homelable-hacs PR #23.

ha-relevant: yes

frontend/src/types/__tests__/types.test.ts

@@ -28,7 +28,7 @@ describe('STATUS_COLORS', () => {
 
 describe('EDGE_TYPE_LABELS', () => {
   it('has an entry for every edge type', () => {
-    const expectedTypes = ['ethernet', 'wifi', 'iot', 'vlan', 'virtual', 'cluster']
+    const expectedTypes = ['ethernet', 'wifi', 'iot', 'vlan', 'virtual', 'cluster', 'fibre']
     expectedTypes.forEach((t) => {
       expect(EDGE_TYPE_LABELS).toHaveProperty(t)
     })

frontend/src/types/index.ts

@@ -37,7 +37,7 @@ export type TextPosition =
   | 'bottom-center'
   | 'bottom-right'
 
-export type EdgeType = 'ethernet' | 'wifi' | 'iot' | 'vlan' | 'virtual' | 'cluster'
+export type EdgeType = 'ethernet' | 'wifi' | 'iot' | 'vlan' | 'virtual' | 'cluster' | 'fibre'
 
 export type NodeStatus = 'online' | 'offline' | 'pending' | 'unknown'
 
@@ -106,8 +106,10 @@ export interface NodeData extends Record<string, unknown> {
    */
   collapsed?: boolean
   custom_icon?: string
-  /** Number of bottom connection points, 1..48. Default 1 (centered). */
+  /** Number of bottom connection points, 1..64. Default 1 (centered). */
   bottom_handles?: number
+  /** Show a port number (1..N) above each bottom connection point. */
+  show_port_numbers?: boolean
   /** Text node content (type === 'text') */
   text_content?: string
 }
@@ -173,6 +175,7 @@ export const EDGE_TYPE_LABELS: Record<EdgeType, string> = {
   vlan: 'VLAN',
   virtual: 'Virtual',
   cluster: 'Cluster',
+  fibre: 'Fibre',
 }
 
 export interface NodeTypeStyle {