feat: LuaJIT worker-pool VM, multimodal/disable-thinking passthrough, WebUI redesign, DeepSeek V4

internal/lua/adapters/gemini.lua

@@ -11,11 +11,30 @@ function adapter.transform_request(raw_body)
     local ok, req = pcall(json.decode, raw_body)
     if not ok then return raw_body end
 
+    -- 将 OpenAI 风格 content（字符串或 [{type:*}] 数组）拆成 Gemini parts
+    local function to_parts(content)
+        if type(content) == "string" then
+            return { { text = content } }
+        end
+        local parts = {}
+        for _, p in ipairs(content or {}) do
+            if p.type == "text" then
+                table.insert(parts, { text = p.text })
+            elseif p.type == "image_url" and type(p.image_url) == "table" and p.image_url.url then
+                local mt, b64 = string.match(p.image_url.url, "^data:([^,]+);base64,(.+)$")
+                if b64 then
+                    table.insert(parts, { inline_data = { mime_type = mt or "image/png", data = b64 } })
+                end
+            end
+        end
+        return parts
+    end
+
     local contents = {}
     for _, m in ipairs(req.messages or {}) do
         table.insert(contents, {
             role = (m.role == "assistant") and "model" or m.role,
-            parts = { { text = m.content } }
+            parts = to_parts(m.content)
         })
     end