feat: add support for non-markdown files and improve drawings UI

- Added scanning and metadata tracking for non-markdown files (images, PDFs, videos, code files)
- Redesigned drawings editor header with new toolbar layout and dropdown menus
- Added file picker dropdown to easily open existing .excalidraw files
- Implemented new file creation flow with auto-generated filenames
- Added export options menu with PNG/SVG/JSON export variants
- Updated proxy config to support vault file access
- Adde

vault/.obsidian/workspace.json

@@ -13,10 +13,10 @@
             "state": {
               "type": "excalidraw",
               "state": {
-                "file": "Drawing-20251028-1452.excalidraw.md"
+                "file": "dessin.excalidraw.md"
               },
               "icon": "excalidraw-icon",
-              "title": "Drawing-20251028-1452.excalidraw"
+              "title": "dessin.excalidraw"
             }
           }
         ]
@@ -178,11 +178,22 @@
   },
   "active": "8309e5042a8fb85c",
   "lastOpenFiles": [
+    "Dessin-02.png",
+    "mixe/Relaxing Music relax music music _hls-480_.mp4",
+    "Dessin-02.excalidraw.md",
+    "dessin.excalidraw.md",
+    "Drawing-20251028-1452.excalidraw.md",
+    "Dessin-02.excalidraw.md.tmp",
+    "Dessin-02.excalidraw.md.bak",
+    "mixe/ThinkBook_16_G7_ARP_Spec.pdf",
+    "mixe/Claude_ObsiViewer_V1.png",
+    "mixe/image_no_bg_clean.svg",
+    "mixe/dessin.json",
+    "mixe",
+    "New folder",
     "Drawing-20251028-1452.png",
     "Drawing-20251028-1452.excalidraw.md.bak",
-    "Drawing-20251028-1452.excalidraw.md",
     "dessin.svg",
-    "dessin.excalidraw.md",
     "dessin.png",
     "dessin.excalidraw.md.bak",
     "dessin_05.svg",
@@ -190,16 +201,9 @@
     "dessin_05.excalidraw.md",
     "dessin_03.excalidraw.md",
     "dessin_05.excalidraw.md.bak",
-    "dessin_04.excalidraw.md.tmp",
-    "dessin_04.excalidraw.md.bak",
     "dessin_04.excalidraw.md",
     "dessin-002.excalidraw.md",
-    "dessin_03.excalidraw.md.tmp",
-    "dessin_03.excalidraw.md.bak",
-    "dessin-002.excalidraw.md.tmp",
-    "dessin-002.excalidraw.md.bak",
     "Dessin_001.excalidraw.md",
-    "Dessin_001.excalidraw.md.tmp",
     "Drawing 2025-10-28 11.11.59.excalidraw.md",
     "dessin-06.excalidraw.md",
     "Dessin-5.excalidraw.md",
@@ -217,7 +221,6 @@
     "HOME.md",
     "Drawing-20251027-1914.excalidraw.md",
     "Drawing-20251027-1705.excalidraw.md",
-    "Drawing 2025-10-27 16.43.48.excalidraw.md",
     "Untitled.canvas"
   ]
 }