fix: wire up maintenance flow creation, editing, and navigation in frontend

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

frontend/src/store/proceduralEditorStore.ts

@@ -64,6 +64,7 @@ function createDefaultField(index: number, existingFields: IntakeFormField[]): I
 interface ProceduralEditorState {
   // Tree metadata
   treeId: string | null
+  treeType: TreeType
   name: string
   description: string
   categoryId: string | null
@@ -83,11 +84,12 @@ interface ProceduralEditorState {
   isSaving: boolean
 
   // Actions - Init
-  initNew: () => void
+  initNew: (type?: TreeType) => void
   loadTree: (tree: Tree) => void
   reset: () => void
 
   // Actions - Metadata
+  setTreeType: (treeType: TreeType) => void
   setName: (name: string) => void
   setDescription: (description: string) => void
   setCategoryId: (categoryId: string | null) => void
@@ -131,6 +133,7 @@ export const useProceduralEditorStore = create<ProceduralEditorState>()(
     immer((set, get) => ({
       // Initial state
       treeId: null,
+      treeType: 'procedural' as TreeType,
       name: '',
       description: '',
       categoryId: null,
@@ -146,9 +149,10 @@ export const useProceduralEditorStore = create<ProceduralEditorState>()(
       isSaving: false,
 
       // Init
-      initNew: () => {
+      initNew: (type?: TreeType) => {
         set((state) => {
           state.treeId = null
+          state.treeType = type || 'procedural'
           state.name = ''
           state.description = ''
           state.categoryId = null
@@ -169,6 +173,7 @@ export const useProceduralEditorStore = create<ProceduralEditorState>()(
         const structure = tree.tree_structure as unknown as ProceduralTreeStructure
         set((state) => {
           state.treeId = tree.id
+          state.treeType = tree.tree_type
           state.name = tree.name
           state.description = tree.description || ''
           state.categoryId = tree.category_id
@@ -188,6 +193,7 @@ export const useProceduralEditorStore = create<ProceduralEditorState>()(
       reset: () => {
         set((state) => {
           state.treeId = null
+          state.treeType = 'procedural'
           state.name = ''
           state.description = ''
           state.categoryId = null
@@ -205,6 +211,7 @@ export const useProceduralEditorStore = create<ProceduralEditorState>()(
       },
 
       // Metadata
+      setTreeType: (treeType) => set((state) => { state.treeType = treeType }),
       setName: (name) => set((state) => { state.name = name; state.isDirty = true }),
       setDescription: (description) => set((state) => { state.description = description; state.isDirty = true }),
       setCategoryId: (categoryId) => set((state) => { state.categoryId = categoryId; state.isDirty = true }),
@@ -343,7 +350,7 @@ export const useProceduralEditorStore = create<ProceduralEditorState>()(
         return {
           name: state.name,
           description: state.description,
-          tree_type: 'procedural' as TreeType,
+          tree_type: state.treeType,
           tree_structure: { steps: state.steps },
           intake_form: state.intakeForm.length > 0 ? state.intakeForm : undefined,
           category_id: state.categoryId,