feat(digital-signatures): simplify form, add TIFF support, subcategories, download options

- Remove 'initials' type, expirationDate, legalStatus, usageNotes fields
- Add subcategory field with creatable input + 6 default categories
- Add TIFF upload support with client-side utif2 decode for preview
- Store original TIFF data separately for faithful downloads
- Add download dropdown: Original file, Word (.docx), PDF (.pdf)
- Group assets by subcategory in list view
- Add subcategory filter in search bar
- Install docx, jspdf, utif2 packages
- Closes 3.07

src/modules/digital-signatures/hooks/use-signatures.ts

@@ -14,6 +14,7 @@ const PREFIX = "sig:";
 export interface SignatureFilters {
   search: string;
   type: SignatureAssetType | "all";
+  subcategory: string; // "" means all
 }
 
 export function useSignatures() {
@@ -23,6 +24,7 @@ export function useSignatures() {
   const [filters, setFilters] = useState<SignatureFilters>({
     search: "",
     type: "all",
+    subcategory: "",
   });
 
   const refresh = useCallback(async () => {
@@ -110,10 +112,14 @@ export function useSignatures() {
 
   const filteredAssets = assets.filter((a) => {
     if (filters.type !== "all" && a.type !== filters.type) return false;
+    if (filters.subcategory && a.subcategory !== filters.subcategory)
+      return false;
     if (filters.search) {
       const q = filters.search.toLowerCase();
       return (
-        a.label.toLowerCase().includes(q) || a.owner.toLowerCase().includes(q)
+        a.label.toLowerCase().includes(q) ||
+        a.owner.toLowerCase().includes(q) ||
+        a.subcategory.toLowerCase().includes(q)
       );
     }
     return true;

src/modules/digital-signatures/types.ts

@@ -1,7 +1,7 @@
-import type { Visibility } from '@/core/module-registry/types';
-import type { CompanyId } from '@/core/auth/types';
+import type { Visibility } from "@/core/module-registry/types";
+import type { CompanyId } from "@/core/auth/types";
 
-export type SignatureAssetType = 'signature' | 'stamp' | 'initials';
+export type SignatureAssetType = "signature" | "stamp";
 
 /** Version history entry */
 export interface AssetVersion {
@@ -11,19 +11,30 @@ export interface AssetVersion {
   createdAt: string;
 }
 
+/** Default subcategory options (users can add more) */
+export const DEFAULT_SUBCATEGORIES = [
+  "Colaboratori",
+  "Experți tehnici",
+  "Verificatori de proiect",
+  "Proiectanți",
+  "Diriginți de șantier",
+  "Responsabili tehnici",
+] as const;
+
 export interface SignatureAsset {
   id: string;
   label: string;
   type: SignatureAssetType;
+  /** Preview image data URL (PNG/JPG — browsers can render this) */
   imageUrl: string;
+  /** Original file data URL (for TIFF originals or same as imageUrl) */
+  originalFileData?: string;
+  /** Original file name for downloads */
+  originalFileName?: string;
   owner: string;
   company: CompanyId;
-  /** Expiration date (YYYY-MM-DD) */
-  expirationDate?: string;
-  /** Legal status description */
-  legalStatus: string;
-  /** Usage notes */
-  usageNotes: string;
+  /** Subcategory for grouping (e.g. "Colaboratori firma X") */
+  subcategory: string;
   /** Version history */
   versions: AssetVersion[];
   tags: string[];