feat: SOTA Image to Base64 converter with 6 output formats (#65)

* feat(image-to-base64): register tool in shared constants and i18n

* feat(image-to-base64): add API route with Sharp pipeline and base64 encoding

* feat(image-to-base64): add Zustand store for base64 results

* feat(image-to-base64): add settings panel component

* feat(image-to-base64): add results panel with 6-tab output and batch accordion

* feat(image-to-base64): register tool in frontend tool registry

* fix(image-to-base64): pass through original buffer when no resize/conversion needed

---------

Co-authored-by: stirling-image <stirling-image@users.noreply.github.com>

packages/shared/src/constants.ts

@@ -307,6 +307,14 @@ export const TOOLS: Tool[] = [
     icon: "ScanLine",
     route: "/barcode-read",
   },
+  {
+    id: "image-to-base64",
+    name: "Image to Base64",
+    description: "Convert images to base64 strings for embedding in HTML, CSS, and more",
+    category: "utilities",
+    icon: "Code",
+    route: "/image-to-base64",
+  },
   // Layout & Composition
   {
     id: "collage",

packages/shared/src/i18n/en.ts

@@ -152,6 +152,10 @@ export const en = {
       description:
         "Resize, optimize, change speed, reverse, extract frames, and rotate animated GIFs",
     },
+    "image-to-base64": {
+      name: "Image to Base64",
+      description: "Convert images to base64 strings for embedding in HTML, CSS, and more",
+    },
     pipeline: { name: "Pipeline Builder", description: "Chain multiple tools into a workflow" },
     batch: { name: "Batch Processing", description: "Apply any tool to multiple images" },
   },