fix: remove manual project creation, smart sequence release, received-invoices schema fix

- Remove ProjectCreate page, POST /projects endpoint, and next-number endpoint
- Projects can only be created through orders (shared numbering sequence)
- Remove dead CreateProjectSchema and createProject service function
- Delete 'order' row from number_sequences (unused; code uses 'shared')
- Smart sequence release: decrement last_number only when deleting the highest number
- Fix received-invoices stats referencing non-existent is_deleted and amount_czk columns
- Update deploy instructions in CLAUDE.md (npm install, prisma migrate deploy)

Co-Authored-By: Claude Opus 4.7 <noreply@anthropic.com>

src/routes/admin/projects.ts

@@ -5,19 +5,16 @@ import { success, error, parseId } from "../../utils/response";
 import { parsePagination, buildPaginationMeta } from "../../utils/pagination";
 import { parseBody } from "../../schemas/common";
 import {
-  CreateProjectSchema,
   UpdateProjectSchema,
   CreateProjectNoteSchema,
 } from "../../schemas/projects.schema";
 import {
   listProjects,
   getProject,
-  createProject,
   updateProject,
   deleteProject,
   createProjectNote,
   deleteProjectNote,
-  getNextProjectNumber,
 } from "../../services/projects.service";
 
 export default async function projectsRoutes(
@@ -61,30 +58,6 @@ export default async function projectsRoutes(
     },
   );
 
-  fastify.post(
-    "/",
-    { preHandler: requirePermission("projects.create") },
-    async (request, reply) => {
-      const parsed = parseBody(CreateProjectSchema, request.body);
-      if ("error" in parsed) return error(reply, parsed.error, 400);
-
-      const project = await createProject(parsed.data);
-      if ("error" in project) {
-        return error(reply, project.error, (project as any).status ?? 400);
-      }
-
-      await logAudit({
-        request,
-        authData: request.authData,
-        action: "create",
-        entityType: "project",
-        entityId: project.id,
-        description: `Vytvořen projekt ${project.name}`,
-      });
-      return success(reply, { id: project.id }, 201, "Projekt byl vytvořen");
-    },
-  );
-
   fastify.put<{ Params: { id: string } }>(
     "/:id",
     { preHandler: requirePermission("projects.edit") },
@@ -137,16 +110,6 @@ export default async function projectsRoutes(
     },
   );
 
-  // GET /api/admin/projects/next-number — shared sequence with orders (matches PHP)
-  fastify.get(
-    "/next-number",
-    { preHandler: requirePermission("projects.create") },
-    async (_request, reply) => {
-      const nextNumber = await getNextProjectNumber();
-      return success(reply, { next_number: nextNumber });
-    },
-  );
-
   // DELETE /api/admin/projects/:id/notes/:noteId
   fastify.delete<{ Params: { id: string; noteId: string } }>(
     "/:id/notes/:noteId",