fix: validate responsiblePerson against existing resources in bot tools

The create_project and update_project AI assistant tools now resolve
the responsiblePerson field against active resources (case-insensitive).
This ensures the name matches an existing resource so dashboard
widgets like "My Projects" can correctly link projects to people.

Closes #15

Co-Authored-By: claude-flow <ruv@ruv.net>

packages/api/src/router/assistant-tools.ts

@@ -374,6 +374,7 @@ export const TOOL_DEFINITIONS: ToolDef[] = [
           budgetCents: { type: "integer", description: "New budget in cents (e.g. 10000000 = 100,000 EUR)" },
           winProbability: { type: "integer", description: "Win probability 0-100" },
           status: { type: "string", description: "New status: DRAFT, ACTIVE, ON_HOLD, COMPLETED, CANCELLED" },
+          responsiblePerson: { type: "string", description: "Name of the responsible person. Must match an existing resource's display name (case-insensitive search)." },
         },
         required: ["id"],
       },
@@ -396,7 +397,7 @@ export const TOOL_DEFINITIONS: ToolDef[] = [
           endDate: { type: "string", description: "End date (YYYY-MM-DD)" },
           winProbability: { type: "integer", description: "Win probability 0-100. Default: 100" },
           status: { type: "string", description: "Initial status: DRAFT, ACTIVE, ON_HOLD. Default: DRAFT" },
-          responsiblePerson: { type: "string", description: "Name of the responsible person" },
+          responsiblePerson: { type: "string", description: "Name of the responsible person. Must match an existing resource's display name (case-insensitive search)." },
           color: { type: "string", description: "Hex color (e.g. '#3b82f6')" },
           blueprintName: { type: "string", description: "Blueprint name to look up and attach (partial match)" },
           clientName: { type: "string", description: "Client name to look up and attach (partial match)" },
@@ -407,6 +408,34 @@ export const TOOL_DEFINITIONS: ToolDef[] = [
   },
 ];
 
+// ─── Helpers ────────────────────────────────────────────────────────────────
+
+/** Resolve a responsible person name against existing resources. Returns the exact displayName or an error object. */
+async function resolveResponsiblePerson(
+  name: string,
+  db: ToolContext["db"],
+): Promise<{ displayName: string } | { error: string }> {
+  // Exact match first (case-insensitive)
+  const exact = await db.resource.findFirst({
+    where: { displayName: { equals: name, mode: "insensitive" }, isActive: true },
+    select: { displayName: true },
+  });
+  if (exact) return { displayName: exact.displayName };
+
+  // Fuzzy: contains search
+  const candidates = await db.resource.findMany({
+    where: { displayName: { contains: name, mode: "insensitive" }, isActive: true },
+    select: { displayName: true, eid: true },
+    take: 5,
+  });
+  if (candidates.length === 1) return { displayName: candidates[0]!.displayName };
+  if (candidates.length > 1) {
+    const list = candidates.map((c) => `${c.displayName} (${c.eid})`).join(", ");
+    return { error: `Multiple resources match "${name}": ${list}. Please specify the exact name.` };
+  }
+  return { error: `No active resource found matching "${name}". The responsible person must be an existing resource.` };
+}
+
 // ─── Tool Executors ─────────────────────────────────────────────────────────
 
 const executors = {
@@ -1389,6 +1418,7 @@ const executors = {
   async update_project(params: {
     id: string; name?: string; budgetCents?: number;
     winProbability?: number; status?: string;
+    responsiblePerson?: string;
   }, ctx: ToolContext) {
     assertPermission(ctx, "manageProjects" as PermissionKey);
     const data: Record<string, unknown> = {};
@@ -1397,6 +1427,13 @@ const executors = {
     if (params.winProbability !== undefined) data.winProbability = params.winProbability;
     if (params.status !== undefined) data.status = params.status;
 
+    // Validate responsible person against existing resources
+    if (params.responsiblePerson !== undefined) {
+      const result = await resolveResponsiblePerson(params.responsiblePerson, ctx.db);
+      if ("error" in result) return { error: result.error };
+      data.responsiblePerson = result.displayName;
+    }
+
     if (Object.keys(data).length === 0) return { error: "No fields to update" };
 
     const project = await ctx.db.project.update({
@@ -1453,6 +1490,14 @@ const executors = {
     if (isNaN(endDate.getTime())) return { error: `Invalid endDate: ${params.endDate}` };
     if (endDate < startDate) return { error: "endDate must be after startDate" };
 
+    // Validate responsible person against existing resources
+    let resolvedResponsible: string | undefined;
+    if (params.responsiblePerson) {
+      const result = await resolveResponsiblePerson(params.responsiblePerson, ctx.db);
+      if ("error" in result) return { error: result.error };
+      resolvedResponsible = result.displayName;
+    }
+
     // Optional: look up blueprint by name
     let blueprintId: string | undefined;
     if (params.blueprintName) {
@@ -1486,7 +1531,7 @@ const executors = {
         endDate,
         winProbability: params.winProbability ?? 100,
         status,
-        ...(params.responsiblePerson ? { responsiblePerson: params.responsiblePerson } : {}),
+        ...(resolvedResponsible ? { responsiblePerson: resolvedResponsible } : {}),
         ...(params.color ? { color: params.color } : {}),
         ...(blueprintId ? { blueprintId } : {}),
         ...(clientId ? { clientId } : {}),