feat(object-browser): add table Add to AI context menu entry

apps/desktop/src/components/objects/__tests__/ObjectBrowserAddToAi.spec.ts

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+import { readFileSync } from "node:fs";
+import { describe, expect, it } from "vitest";
+
+const source = readFileSync(new URL("../ObjectBrowser.vue", import.meta.url), "utf8");
+
+function functionBody(name: string): string {
+  const signature = new RegExp(`(?:async\\s+)?function\\s+${name}\\s*\\([^)]*\\)\\s*(?::\\s*[^\\{]+)?\\{`, "m").exec(source);
+  if (!signature) throw new Error(`Missing function ${name}`);
+  const bodyStart = signature.index + signature[0].length;
+  let depth = 1;
+  for (let index = bodyStart; index < source.length; index += 1) {
+    if (source[index] === "{") depth += 1;
+    else if (source[index] === "}") depth -= 1;
+    if (depth === 0) return source.slice(bodyStart, index);
+  }
+  throw new Error(`Unclosed function ${name}`);
+}
+
+describe("ObjectBrowser add to AI", () => {
+  it("declares the addToAi emit for table context hand-off", () => {
+    const emitDeclaration = source.slice(source.indexOf("const emit = defineEmits"), source.indexOf(">();", source.indexOf("const emit = defineEmits")));
+    expect(emitDeclaration).toContain("addToAi");
+  });
+
+  it("adds an 'Add to AI' menu item after 'New Query' in the table menu", () => {
+    const tableMenu = functionBody("getTableMenuItems");
+    const newQueryIndex = tableMenu.indexOf('t("contextMenu.newQuery")');
+    const addToAiIndex = tableMenu.indexOf("addToAiMenuItem(item)");
+    expect(newQueryIndex).toBeGreaterThan(-1);
+    expect(addToAiIndex).toBeGreaterThan(newQueryIndex);
+  });
+
+  it("guards the menu item behind supportsAiAssistantContext", () => {
+    const tableMenu = functionBody("getTableMenuItems");
+    expect(tableMenu).toContain("supportsAiAssistantContext(effectiveDatabaseType.value)");
+    expect(tableMenu).toContain("[addToAiMenuItem(item)]");
+  });
+
+  it("offers 'Add to AI' in the VictoriaMetrics early-return branch too", () => {
+    const tableMenu = functionBody("getTableMenuItems");
+    // The VM branch is the first block inside getTableMenuItems; verify it guards
+    // the same AI entry so ObjectBrowser stays consistent with the sidebar tree.
+    const vmBranchStart = tableMenu.indexOf("if (isVictoriaMetrics.value)");
+    const vmBranchEnd = tableMenu.indexOf("const useBatchActions", vmBranchStart);
+    const vmBranch = tableMenu.slice(vmBranchStart, vmBranchEnd);
+
+    expect(vmBranch).toContain("supportsAiAssistantContext(effectiveDatabaseType.value)");
+    expect(vmBranch).toContain("[addToAiMenuItem(item)]");
+    expect(vmBranch.indexOf("addToAiMenuItem(item)")).toBeGreaterThan(vmBranch.indexOf('t("contextMenu.newQuery")'));
+  });
+
+  it("emits selected tables (batch) or the single table with per-row schema", () => {
+    const addToAi = functionBody("addToAiMenuItem");
+    expect(addToAi).toContain("selectedTableRows.value.map((row) => ({ name: row.name, schema: row.schema }))");
+    expect(addToAi).toContain('emit("addToAi", targets)');
+    expect(addToAi).toContain('t("contextMenu.addToAiMultiple", { count })');
+    expect(addToAi).toContain('t("contextMenu.addToAi")');
+  });
+});