feat: add FormStore for CRUD on form definitions

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

src/core/form-store.ts

@@ -0,0 +1,73 @@
+import { FormDefinition, FormfireSettings } from '../types';
+
+/**
+ * Manages CRUD operations on FormDefinitions within plugin settings.
+ * Does NOT persist --- the caller (plugin) calls saveSettings() after mutations.
+ */
+export class FormStore {
+  constructor(private settings: FormfireSettings) {}
+
+  getAll(): FormDefinition[] {
+    return this.settings.forms;
+  }
+
+  getById(id: string): FormDefinition | undefined {
+    return this.settings.forms.find(f => f.id === id);
+  }
+
+  getByName(name: string): FormDefinition | undefined {
+    return this.settings.forms.find(
+      f => f.name.toLowerCase() === name.toLowerCase(),
+    );
+  }
+
+  add(form: FormDefinition): void {
+    this.settings.forms.push(form);
+  }
+
+  update(id: string, patch: Partial<FormDefinition>): void {
+    const idx = this.settings.forms.findIndex(f => f.id === id);
+    if (idx === -1) return;
+    this.settings.forms[idx] = { ...this.settings.forms[idx], ...patch };
+  }
+
+  remove(id: string): void {
+    this.settings.forms = this.settings.forms.filter(f => f.id !== id);
+  }
+
+  duplicate(id: string): FormDefinition | undefined {
+    const original = this.getById(id);
+    if (!original) return undefined;
+    const copy: FormDefinition = {
+      ...structuredClone(original),
+      id: crypto.randomUUID(),
+      name: `${original.name} (Copy)`,
+    };
+    this.settings.forms.push(copy);
+    return copy;
+  }
+
+  /** Move a form up or down in the list. */
+  reorder(id: string, direction: 'up' | 'down'): void {
+    const idx = this.settings.forms.findIndex(f => f.id === id);
+    if (idx === -1) return;
+    const swap = direction === 'up' ? idx - 1 : idx + 1;
+    if (swap < 0 || swap >= this.settings.forms.length) return;
+    [this.settings.forms[idx], this.settings.forms[swap]] =
+      [this.settings.forms[swap], this.settings.forms[idx]];
+  }
+
+  /** Create a blank FormDefinition with sensible defaults. */
+  createBlank(): FormDefinition {
+    return {
+      id: crypto.randomUUID(),
+      name: 'New Form',
+      icon: 'file-input',
+      mode: 'create',
+      targetFolder: '/',
+      fileNameTemplate: '{{date}}-{{title}}',
+      bodyTemplate: '',
+      fields: [],
+    };
+  }
+}