fix: trim whitespace from tool names to prevent invalid tool calls

Some models (e.g. kimi-k2.5) return tool names with leading spaces
like ' delegate_task', causing tool matching to fail.

Add .trim() in transformToolName() and defensive trim in claude-code-hooks.

Fixes #1568

src/shared/tool-name.test.ts

@@ -0,0 +1,155 @@
+import { describe, it, expect } from "bun:test"
+import { transformToolName } from "./tool-name"
+
+describe("transformToolName", () => {
+  describe("whitespace trimming", () => {
+    it("trims leading whitespace from tool name", () => {
+      // given
+      const toolName = " delegate_task"
+
+      // when
+      const result = transformToolName(toolName)
+
+      // then
+      expect(result).toBe("DelegateTask")
+    })
+
+    it("trims trailing whitespace from tool name", () => {
+      // given
+      const toolName = "delegate_task "
+
+      // when
+      const result = transformToolName(toolName)
+
+      // then
+      expect(result).toBe("DelegateTask")
+    })
+
+    it("trims both leading and trailing whitespace", () => {
+      // given
+      const toolName = " delegate_task "
+
+      // when
+      const result = transformToolName(toolName)
+
+      // then
+      expect(result).toBe("DelegateTask")
+    })
+
+    it("applies special mapping after trimming whitespace", () => {
+      // given
+      const toolName = " webfetch"
+
+      // when
+      const result = transformToolName(toolName)
+
+      // then
+      expect(result).toBe("WebFetch")
+    })
+
+    it("handles simple case with leading and trailing spaces", () => {
+      // given
+      const toolName = " read "
+
+      // when
+      const result = transformToolName(toolName)
+
+      // then
+      expect(result).toBe("Read")
+    })
+  })
+
+  describe("special tool mappings", () => {
+    it("maps webfetch to WebFetch", () => {
+      // given
+      const toolName = "webfetch"
+
+      // when
+      const result = transformToolName(toolName)
+
+      // then
+      expect(result).toBe("WebFetch")
+    })
+
+    it("maps websearch to WebSearch", () => {
+      // given
+      const toolName = "websearch"
+
+      // when
+      const result = transformToolName(toolName)
+
+      // then
+      expect(result).toBe("WebSearch")
+    })
+
+    it("maps todoread to TodoRead", () => {
+      // given
+      const toolName = "todoread"
+
+      // when
+      const result = transformToolName(toolName)
+
+      // then
+      expect(result).toBe("TodoRead")
+    })
+
+    it("maps todowrite to TodoWrite", () => {
+      // given
+      const toolName = "todowrite"
+
+      // when
+      const result = transformToolName(toolName)
+
+      // then
+      expect(result).toBe("TodoWrite")
+    })
+  })
+
+  describe("kebab-case and snake_case conversion", () => {
+    it("converts snake_case to PascalCase", () => {
+      // given
+      const toolName = "delegate_task"
+
+      // when
+      const result = transformToolName(toolName)
+
+      // then
+      expect(result).toBe("DelegateTask")
+    })
+
+    it("converts kebab-case to PascalCase", () => {
+      // given
+      const toolName = "call-omo-agent"
+
+      // when
+      const result = transformToolName(toolName)
+
+      // then
+      expect(result).toBe("CallOmoAgent")
+    })
+  })
+
+  describe("simple capitalization", () => {
+    it("capitalizes simple single-word tool names", () => {
+      // given
+      const toolName = "read"
+
+      // when
+      const result = transformToolName(toolName)
+
+      // then
+      expect(result).toBe("Read")
+    })
+
+    it("preserves capitalization of already capitalized names", () => {
+      // given
+      const toolName = "Write"
+
+      // when
+      const result = transformToolName(toolName)
+
+      // then
+      expect(result).toBe("Write")
+    })
+  })
+})