Add vision support, gRPC reflection toggle, and chat improvements

- Add Vision framework integration for image analysis (OCR, classification)
- Add image attachment support in chat UI with drag & drop
- Add recent images sidebar from Downloads/Desktop
- Add copy to clipboard button for assistant responses
- Add gRPC reflection service with toggle in settings
- Create proper .proto file and generate Swift code
- Add server restart when toggling reflection setting
- Fix port number formatting in settings (remove comma grouping)
- Update gRPC dependencies to v2.x

🤖 Generated with [Claude Code](https://claude.com/claude-code)

Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>

Package.resolved

@@ -1,13 +1,22 @@
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   "pins" : [
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-      "identity" : "grpc-swift",
+      "identity" : "grpc-swift-2",
       "kind" : "remoteSourceControl",
-      "location" : "https://github.com/grpc/grpc-swift.git",
+      "location" : "https://github.com/grpc/grpc-swift-2.git",
       "state" : {
-        "revision" : "adc18c3e1c55027d0ce43893897ac448e3f27ebe",
-        "version" : "2.2.3"
+        "revision" : "531924b28fde0cf7585123c781c6f55cc35ef7fc",
+        "version" : "2.2.1"
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+    },
+    {
+      "identity" : "grpc-swift-extras",
+      "kind" : "remoteSourceControl",
+      "location" : "https://github.com/grpc/grpc-swift-extras.git",
+      "state" : {
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@@ -15,8 +24,8 @@
       "kind" : "remoteSourceControl",
       "location" : "https://github.com/grpc/grpc-swift-nio-transport.git",
       "state" : {
-        "revision" : "ca2303eb7f3df556beafbba33a143ffa30d5b786",
-        "version" : "1.2.3"
+        "revision" : "dcfa8dc858bba5ded7a3760cede8c5fc03558a42",
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       }
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@@ -24,8 +33,8 @@
       "kind" : "remoteSourceControl",
       "location" : "https://github.com/grpc/grpc-swift-protobuf.git",
       "state" : {
-        "revision" : "53e89e3a5d417307f70a721c7b83e564fefb1e1c",
-        "version" : "1.3.1"
+        "revision" : "a1aa982cb2a276c72b478433eb75a4ec6508a277",
+        "version" : "2.1.2"
       }
     },
     {
@@ -100,6 +109,15 @@
         "version" : "4.2.0"
       }
     },
+    {
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+      "kind" : "remoteSourceControl",
+      "location" : "https://github.com/apple/swift-distributed-tracing.git",
+      "state" : {
+        "revision" : "baa932c1336f7894145cbaafcd34ce2dd0b77c97",
+        "version" : "1.3.1"
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       "identity" : "swift-http-structured-headers",
       "kind" : "remoteSourceControl",
@@ -190,6 +208,15 @@
         "version" : "1.33.3"
       }
     },
+    {
+      "identity" : "swift-service-context",
+      "kind" : "remoteSourceControl",
+      "location" : "https://github.com/apple/swift-service-context.git",
+      "state" : {
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+        "version" : "1.2.1"
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       "identity" : "swift-service-lifecycle",
       "kind" : "remoteSourceControl",