feat(admin): crée un ticket Forgejo depuis un message de contact (#81)

Depuis /admin/messages, un admin peut créer une issue Forgejo à partir d'un message utilisateur : bouton « Créer un ticket » → modale pré-remplie éditable → l'issue est créée via l'API Forgejo et le lien (#N) est mémorisé sur le message. Première intégration Forgejo d'apps/api. - Modèle : `forgejoIssueNumber` / `forgejoIssueUrl` sur `ContactMessage` (migration `20260908130000_contact_message_forgejo_link`, 2 colonnes nullables, aucun backfill). - Config : `FORGEJO_BASE_URL` / `FORGEJO_TOKEN` / `FORGEJO_REPO`, toutes `.optional()` — **fail-closed** (même posture que `ADMIN_JWT_SECRET`) : bouton masqué + endpoint `503` tant que les trois ne sont pas là. Documentées dans `.env.example` ; valeurs de test dans `ci.yml`. - `ForgejoService` (`lib/forgejo/forgejo.service.ts`, singleton `forgejo`) : `isConfigured()` + `createIssue({ title, body })` → `POST .../issues`, en-tête `Authorization: token <pat>`, lit `{ number, html_url }` ; erreur réseau / non-2xx / JSON invalide ⇒ `HttpError 502 FORGEJO_REQUEST_FAILED`. - `admin-contact` : `POST /admin/api/contact/:id/forgejo-issue` (`createForgejoIssueFromMessage` — ordre 503 → 404 → 409 → Forgejo → écriture BDD ; un échec Forgejo ne touche pas la BDD) et `GET /admin/api/contact/forgejo/status`. - Contrat partagé : `createForgejoIssueSchema` (title 1–255, body 1–60000), `ContactMessageAdminView` étendu, `ForgejoIntegrationStatus`, nouveaux `ErrorCode` (`FORGEJO_NOT_CONFIGURED`=5001, `FORGEJO_REQUEST_FAILED`=5002, `CONTACT_MESSAGE_ALREADY_LINKED`=4026, `CONTACT_MESSAGE_NOT_FOUND`=4055) + labels i18n. - Front : `MessagesPage` — sonde `forgejo/status` au montage, colonne « Ticket » (lien `#N` si lié, bouton sinon, « non configurée » sinon), `CreateForgejoIssueModal` + helpers purs `messages.ts` (`buildIssueTitle` / `buildIssueBody`). - Tests : `forgejo.service.test.ts` (stub `globalThis.fetch`), `admin-contact.test.ts` étendu (nominal / 503 / 404 / 409 / 502 + ligne intacte / 400), `admin-messages.cy.ts` étendu (modale pré-remplie, lien après création, masquage si non configuré). - Docs : `backend-architecture.md`, `batch-cooking-modele.md`. Closes #81. Co-Authored-By: Claude Sonnet 5 <noreply@anthropic.com>
2026-09-08 20:10:54 +02:00 · 2026-09-08 20:10:54 +02:00 · 30f975d29a
commit 30f975d29a
parent 71758e6d25
22 changed files with 1077 additions and 21 deletions
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@ -39,6 +39,13 @@ env:
  # services/tech-step-intent-service/Dockerfile from this checkout.
  INTENT_SERVICE_BASE_URL: "http://localhost:8000"
  INTENT_SERVICE_SECRET: "ci-only-intent-secret-not-used-anywhere-else-32chars+"
+  # Same reasoning — lets forgejo.service.test.ts / admin-contact.test.ts
+  # exercise the "configured" path (issue #81). `globalThis.fetch` is stubbed
+  # in those tests, so no real request ever leaves CI; these values only need
+  # to parse (a valid URL and an `owner/repo`).
+  FORGEJO_BASE_URL: "https://forgejo.ci.invalid"
+  FORGEJO_TOKEN: "ci-only-forgejo-token-not-used-anywhere-else"
+  FORGEJO_REPO: "ci/batchcooking"

 jobs:
  # Five independent jobs, no needs: between them — each starts in parallel
--- a/apps/api/.env.example
+++ b/apps/api/.env.example
@ -35,3 +35,12 @@ INTENT_SERVICE_SECRET=changeme-generate-a-real-random-secret-at-least-32-chars
 # ADMIN_INITIAL_EMAIL=ops@example.com
 # ADMIN_INITIAL_PASSWORD=changeme-at-least-8-chars
 # ADMIN_INITIAL_NAME=Ops
+
+# Only needed to create a Forgejo issue from a contact message
+# (apps/web's /admin/messages, issue #81). The button is hidden and the
+# endpoint answers 503 while any of the three is unset. FORGEJO_TOKEN is a
+# personal access token with the write:issue scope — generate it in Forgejo,
+# never commit the real value.
+# FORGEJO_BASE_URL=https://git.example.com
+# FORGEJO_TOKEN=changeme-a-forgejo-personal-access-token
+# FORGEJO_REPO=owner/repo
--- a/apps/api/prisma/migrations/20260908130000_contact_message_forgejo_link/migration.sql
+++ b/apps/api/prisma/migrations/20260908130000_contact_message_forgejo_link/migration.sql
@ -0,0 +1,8 @@
+-- Link a contact message to the Forgejo issue an admin created from it
+-- (issue #81). Two nullable columns, no backfill — existing rows have no
+-- linked issue.
+
+-- AlterTable
+ALTER TABLE "contact_message"
+    ADD COLUMN "forgejo_issue_number" INTEGER,
+    ADD COLUMN "forgejo_issue_url" TEXT;
--- a/apps/api/prisma/schema.prisma
+++ b/apps/api/prisma/schema.prisma
@ -1220,6 +1220,16 @@ model ContactMessage {
  appVersion String?  @map("app_version")
  createdAt  DateTime @default(now()) @map("created_at")

+  /// Number of the Forgejo issue an admin created from this message via
+  /// `/admin/messages` (issue #81). `null` = no ticket yet. Non-null ⇒ the
+  /// "Créer un ticket" button disappears (one message links to at most one
+  /// issue).
+  forgejoIssueNumber Int?    @map("forgejo_issue_number")
+  /// The issue's html URL (`<base>/<owner>/<repo>/issues/<n>`) — stored
+  /// as-is rather than rebuilt from `FORGEJO_*` config, so the link stays
+  /// correct even if that config changes later.
+  forgejoIssueUrl    String? @map("forgejo_issue_url")
+
  author UserProfile? @relation(fields: [authorId], references: [id], onDelete: SetNull)

  @@index([createdAt])
--- a/apps/api/src/config/env.ts
+++ b/apps/api/src/config/env.ts
@ -143,6 +143,23 @@ const envSchema = z.object({
  ADMIN_INITIAL_EMAIL: z.string().optional(),
  ADMIN_INITIAL_PASSWORD: z.string().optional(),
  ADMIN_INITIAL_NAME: z.string().optional(),
+  /**
+   * Forgejo instance + credentials for "create an issue from a contact
+   * message" (`/admin/messages`, issue #81). All three `.optional()` and
+   * checked together by `ForgejoService.isConfigured()` — the feature
+   * **fails closed** when any is missing: the endpoint answers `503` and
+   * the admin UI hides the button (same posture as `ADMIN_JWT_SECRET` /
+   * `INTERNAL_WORKER_SECRET`). Only this one admin action reads them; the
+   * rest of the app never talks to Forgejo.
+   */
+  FORGEJO_BASE_URL: z.string().url().optional(),
+  /** Forgejo personal access token with the `write:issue` (or `issue`) scope. Secret — `.env.example` shows only a `changeme`. */
+  FORGEJO_TOKEN: z.string().optional(),
+  /** Target repo as `owner/repo` (e.g. `kyuno/batchCooking`) — issues are always created here, never a repo chosen at call time. */
+  FORGEJO_REPO: z
+    .string()
+    .regex(/^[^/\s]+\/[^/\s]+$/, "FORGEJO_REPO must look like 'owner/repo'")
+    .optional(),
 });

 /** Parsed, validated environment — import this instead of reading `process.env` directly anywhere else. */
--- a/apps/api/src/lib/forgejo/forgejo.service.ts
+++ b/apps/api/src/lib/forgejo/forgejo.service.ts
@ -0,0 +1,102 @@
+import { HttpError } from "@batch-cooking/error-tools";
+import { ErrorCode } from "@batch-cooking/shared";
+import { env } from "../../config/env.js";
+import { logger } from "../logger.service.js";
+
+/** The slice of Forgejo's `POST .../issues` response this integration reads. */
+interface ForgejoIssueResponse {
+  number: number;
+  html_url: string;
+}
+
+/**
+ * The one place `apps/api` talks to Forgejo — creating an issue from a
+ * contact message (`/admin/messages`, issue #81). A class + singleton
+ * (`forgejo` below), same convention as `logger` / `analytics`.
+ *
+ * **Fail-closed**: every method is a no-op / typed error unless all three
+ * `FORGEJO_*` env vars are set (see `config/env.ts`). Callers check
+ * {@link isConfigured} first and answer `503` themselves; {@link createIssue}
+ * re-checks as a backstop.
+ */
+export class ForgejoService {
+  /** True once `FORGEJO_BASE_URL`, `FORGEJO_TOKEN` and `FORGEJO_REPO` are all set. */
+  public isConfigured(): boolean {
+    return (
+      env.FORGEJO_BASE_URL !== undefined &&
+      env.FORGEJO_TOKEN !== undefined &&
+      env.FORGEJO_REPO !== undefined
+    );
+  }
+
+  /**
+   * Creates an issue in `FORGEJO_REPO` with the given title/body (no labels
+   * — a deliberate #81 decision, the admin adds them in Forgejo). Returns
+   * the new issue's number and html URL.
+   *
+   * @throws {HttpError} `503 FORGEJO_NOT_CONFIGURED` if the env isn't set,
+   *   `502 FORGEJO_REQUEST_FAILED` on a network error or any non-2xx / non-JSON
+   *   response — the caller leaves the database untouched in that case.
+   */
+  public async createIssue(input: {
+    title: string;
+    body: string;
+  }): Promise<{ number: number; htmlUrl: string }> {
+    if (!this.isConfigured()) {
+      throw new HttpError(
+        503,
+        ErrorCode.FORGEJO_NOT_CONFIGURED,
+        "Forgejo integration is not configured",
+      );
+    }
+    const url = `${env.FORGEJO_BASE_URL}/api/v1/repos/${env.FORGEJO_REPO}/issues`;
+
+    let response: Response;
+    try {
+      response = await fetch(url, {
+        method: "POST",
+        headers: {
+          "Content-Type": "application/json",
+          // Forgejo/Gitea's PAT scheme — `token <pat>`, not `Bearer`.
+          Authorization: `token ${env.FORGEJO_TOKEN}`,
+        },
+        body: JSON.stringify({ title: input.title, body: input.body }),
+      });
+    } catch (err) {
+      logger.warn("Forgejo issue creation failed (network)", {
+        error: err instanceof Error ? err.message : String(err),
+      });
+      throw new HttpError(502, ErrorCode.FORGEJO_REQUEST_FAILED, "Forgejo request failed");
+    }
+
+    if (!response.ok) {
+      const detail = await response.text().catch(() => "");
+      logger.warn("Forgejo issue creation failed", {
+        status: response.status,
+        detail: detail.slice(0, 500),
+      });
+      throw new HttpError(
+        502,
+        ErrorCode.FORGEJO_REQUEST_FAILED,
+        `Forgejo issues API responded ${response.status}`,
+      );
+    }
+
+    try {
+      const data = (await response.json()) as ForgejoIssueResponse;
+      return { number: data.number, htmlUrl: data.html_url };
+    } catch (err) {
+      logger.warn("Forgejo issue creation failed (bad response)", {
+        error: err instanceof Error ? err.message : String(err),
+      });
+      throw new HttpError(
+        502,
+        ErrorCode.FORGEJO_REQUEST_FAILED,
+        "Forgejo response was not valid JSON",
+      );
+    }
+  }
+}
+
+/** Single shared instance — stateless, same reasoning as `logger` / `analytics`. */
+export const forgejo = new ForgejoService();
--- a/apps/api/src/modules/admin/admin-contact.routes.ts
+++ b/apps/api/src/modules/admin/admin-contact.routes.ts
@ -1,14 +1,24 @@
+import { HttpError } from "@batch-cooking/error-tools";
 import { wrapAsyncHandler } from "@batch-cooking/express-tools";
-import { listContactMessagesQuerySchema } from "@batch-cooking/shared";
+import {
+  createForgejoIssueSchema,
+  ErrorCode,
+  listContactMessagesQuerySchema,
+} from "@batch-cooking/shared";
 import { Router } from "express";
 import { requireAdmin } from "../../middlewares/require-admin.js";
-import { listContactMessages } from "./admin-contact.service.js";
+import {
+  createForgejoIssueFromMessage,
+  getForgejoStatus,
+  listContactMessages,
+} from "./admin-contact.service.js";

 /**
 * Router mounted at `/admin/api/contact` (via `admin.routes.ts`) — behind
- * {@link requireAdmin}. Backs the `/admin/messages` page (issue #80): a
- * read-only list of the contact-form messages users have sent. No write
- * routes — the first version has no triage workflow.
+ * {@link requireAdmin}. Backs the `/admin/messages` page: the read-only list
+ * of contact-form messages (issue #80), plus "create a Forgejo issue from
+ * this message" (issue #81). Still no message-mutation routes — the message
+ * itself stays read-only.
 */
 export const adminContactRouter = Router();

@ -21,3 +31,29 @@ adminContactRouter.get(
      .json(await listContactMessages(listContactMessagesQuerySchema.parse(req.query)));
  }),
 );
+
+// Static path — declared before `/:id/...` so it's never parsed as an id.
+adminContactRouter.get(
+  "/forgejo/status",
+  requireAdmin,
+  wrapAsyncHandler(async (_req, res) => {
+    res.status(200).json(getForgejoStatus());
+  }),
+);
+
+adminContactRouter.post(
+  "/:id/forgejo-issue",
+  requireAdmin,
+  wrapAsyncHandler(async (req, res) => {
+    const id = Number(req.params.id);
+    if (!Number.isInteger(id) || id <= 0) {
+      throw new HttpError(
+        400,
+        ErrorCode.VALIDATION_ERROR,
+        `Not a valid contact message id: ${req.params.id}`,
+      );
+    }
+    const input = createForgejoIssueSchema.parse(req.body);
+    res.status(200).json(await createForgejoIssueFromMessage(id, input));
+  }),
+);
--- a/apps/api/src/modules/admin/admin-contact.service.ts
+++ b/apps/api/src/modules/admin/admin-contact.service.ts
@ -1,9 +1,14 @@
-import type {
-  ContactMessageAdminView,
-  ContactMessageType,
-  ListContactMessagesQuery,
+import { HttpError } from "@batch-cooking/error-tools";
+import {
+  type ContactMessageAdminView,
+  type ContactMessageType,
+  type CreateForgejoIssueInput,
+  ErrorCode,
+  type ForgejoIntegrationStatus,
+  type ListContactMessagesQuery,
 } from "@batch-cooking/shared";
 import { prisma } from "../../db/prisma.js";
+import { forgejo } from "../../lib/forgejo/forgejo.service.js";

 /** How many messages `listContactMessages` returns per call — the page is a triage view, not an export (same cap/rationale as `CORRECTIONS_PAGE_SIZE`). */
 const CONTACT_MESSAGES_PAGE_SIZE = 200;
@ -34,6 +39,8 @@ function toContactMessageAdminView(row: ContactMessageRow): ContactMessageAdminV
    // `null` when the sender's account was deleted after sending
    // (`authorId` is `onDelete: SetNull`).
    author: row.author,
+    forgejoIssueNumber: row.forgejoIssueNumber,
+    forgejoIssueUrl: row.forgejoIssueUrl,
  };
 }

@ -60,3 +67,67 @@ export async function listContactMessages(
    throw err;
  }
 }
+
+/** Whether the "create a Forgejo issue from a message" feature is usable (issue #81) — drives whether the admin UI shows the button. */
+export function getForgejoStatus(): ForgejoIntegrationStatus {
+  return { enabled: forgejo.isConfigured() };
+}
+
+/**
+ * Creates a Forgejo issue from contact message `messageId` and records the
+ * link on the row (issue #81). The `title`/`body` come from the admin's
+ * pre-filled, edited modal.
+ *
+ * Order matters: every precondition is checked before Forgejo is called,
+ * and the row is only touched *after* Forgejo succeeds — a failed call
+ * leaves no partial state (no linked issue, button still shown).
+ *
+ * @throws {HttpError} `503 FORGEJO_NOT_CONFIGURED` (env not set),
+ *   `404 CONTACT_MESSAGE_NOT_FOUND`, `409 CONTACT_MESSAGE_ALREADY_LINKED`
+ *   (already has an issue), or `502 FORGEJO_REQUEST_FAILED` (the Forgejo
+ *   call failed — DB untouched).
+ */
+export async function createForgejoIssueFromMessage(
+  messageId: number,
+  input: CreateForgejoIssueInput,
+): Promise<ContactMessageAdminView> {
+  try {
+    if (!forgejo.isConfigured()) {
+      throw new HttpError(
+        503,
+        ErrorCode.FORGEJO_NOT_CONFIGURED,
+        "Forgejo integration is not configured",
+      );
+    }
+
+    const existing = await prisma.contactMessage.findUnique({ where: { id: messageId } });
+    if (!existing) {
+      throw new HttpError(
+        404,
+        ErrorCode.CONTACT_MESSAGE_NOT_FOUND,
+        `Contact message ${messageId} not found`,
+      );
+    }
+    if (existing.forgejoIssueNumber !== null) {
+      throw new HttpError(
+        409,
+        ErrorCode.CONTACT_MESSAGE_ALREADY_LINKED,
+        `Contact message ${messageId} already links to Forgejo issue #${existing.forgejoIssueNumber}`,
+      );
+    }
+
+    // Throws `502 FORGEJO_REQUEST_FAILED` on any failure — propagated below,
+    // before the row is touched.
+    const issue = await forgejo.createIssue({ title: input.title, body: input.body });
+
+    const updated = await prisma.contactMessage.update({
+      where: { id: messageId },
+      data: { forgejoIssueNumber: issue.number, forgejoIssueUrl: issue.htmlUrl },
+      include: contactMessageInclude,
+    });
+    return toContactMessageAdminView(updated);
+  } catch (err) {
+    // Rethrown as-is — see `admin-tech-steps.service.ts`'s equivalent catch.
+    throw err;
+  }
+}
--- a/apps/api/test/admin-contact.test.ts
+++ b/apps/api/test/admin-contact.test.ts
@ -1,3 +1,4 @@
+import { ErrorCode } from "@batch-cooking/shared";
 import { faker } from "@faker-js/faker";
 import { expect } from "chai";
 import request from "supertest";
@ -49,6 +50,10 @@ async function seedMessage(overrides: {
 }

 const adminSecretConfigured = env.ADMIN_JWT_SECRET !== undefined;
+const forgejoConfigured =
+  env.FORGEJO_BASE_URL !== undefined &&
+  env.FORGEJO_TOKEN !== undefined &&
+  env.FORGEJO_REPO !== undefined;

 describe("Admin contact messages", () => {
  const app = createApp();
@ -177,4 +182,165 @@ describe("Admin contact messages", () => {
    expect(res.body[0].message).to.equal("signalé puis compte supprimé");
    expect(res.body[0].author).to.equal(null);
  });
+
+  describe("Forgejo issue creation (#81)", () => {
+    let originalFetch: typeof fetch;
+
+    beforeEach(() => {
+      originalFetch = globalThis.fetch;
+    });
+
+    afterEach(() => {
+      globalThis.fetch = originalFetch;
+    });
+
+    /** Makes `forgejo.createIssue`'s `fetch` return `body` with `status`. */
+    function stubForgejoFetch(body: unknown, status = 201) {
+      globalThis.fetch = (async () =>
+        new Response(JSON.stringify(body), { status })) as typeof fetch;
+    }
+
+    it("returns 401 without an admin session", async () => {
+      const res = await request(app).post("/admin/api/contact/1/forgejo-issue").send({
+        title: "t",
+        body: "b",
+      });
+      expect(res.status).to.equal(401);
+    });
+
+    it("exposes the integration status", async function () {
+      if (!adminSecretConfigured) {
+        // biome-ignore lint/suspicious/noExplicitAny: mocha's `this.skip()` isn't typed here.
+        (this as any).skip();
+        return;
+      }
+      const agent = await adminAgent();
+      const res = await agent.get("/admin/api/contact/forgejo/status");
+      expect(res.status).to.equal(200);
+      expect(res.body).to.deep.equal({ enabled: forgejoConfigured });
+    });
+
+    it("responds 503 FORGEJO_NOT_CONFIGURED when the env isn't set", async function () {
+      if (!adminSecretConfigured || forgejoConfigured) {
+        // biome-ignore lint/suspicious/noExplicitAny: mocha's `this.skip()` isn't typed here.
+        (this as any).skip();
+        return;
+      }
+      const user = await seedUser();
+      const message = await seedMessage({ authorId: user.id });
+      const agent = await adminAgent();
+
+      const res = await agent
+        .post(`/admin/api/contact/${message.id}/forgejo-issue`)
+        .send({ title: "Titre", body: "Corps du ticket" });
+
+      expect(res.status).to.equal(503);
+      expect(res.body.code).to.equal(ErrorCode.FORGEJO_NOT_CONFIGURED);
+    });
+
+    it("creates the issue and records the link on the message", async function () {
+      if (!adminSecretConfigured || !forgejoConfigured) {
+        // biome-ignore lint/suspicious/noExplicitAny: mocha's `this.skip()` isn't typed here.
+        (this as any).skip();
+        return;
+      }
+      stubForgejoFetch({ number: 77, html_url: "https://forge.example/ci/repo/issues/77" });
+      const user = await seedUser();
+      const message = await seedMessage({ authorId: user.id, message: "un bug précis" });
+      const agent = await adminAgent();
+
+      const res = await agent
+        .post(`/admin/api/contact/${message.id}/forgejo-issue`)
+        .send({ title: "[Bug] un bug précis", body: "un bug précis\n\n---\ncontexte" });
+
+      expect(res.status).to.equal(200);
+      expect(res.body.forgejoIssueNumber).to.equal(77);
+      expect(res.body.forgejoIssueUrl).to.equal("https://forge.example/ci/repo/issues/77");
+
+      const row = await prisma.contactMessage.findFirstOrThrow({ where: { id: message.id } });
+      expect(row.forgejoIssueNumber).to.equal(77);
+      expect(row.forgejoIssueUrl).to.equal("https://forge.example/ci/repo/issues/77");
+    });
+
+    it("responds 404 for an unknown message id", async function () {
+      if (!adminSecretConfigured || !forgejoConfigured) {
+        // biome-ignore lint/suspicious/noExplicitAny: mocha's `this.skip()` isn't typed here.
+        (this as any).skip();
+        return;
+      }
+      stubForgejoFetch({ number: 1, html_url: "x" });
+      const agent = await adminAgent();
+
+      const res = await agent
+        .post("/admin/api/contact/999999/forgejo-issue")
+        .send({ title: "Titre", body: "Corps" });
+
+      expect(res.status).to.equal(404);
+      expect(res.body.code).to.equal(ErrorCode.CONTACT_MESSAGE_NOT_FOUND);
+    });
+
+    it("responds 409 when the message already links to an issue", async function () {
+      if (!adminSecretConfigured || !forgejoConfigured) {
+        // biome-ignore lint/suspicious/noExplicitAny: mocha's `this.skip()` isn't typed here.
+        (this as any).skip();
+        return;
+      }
+      stubForgejoFetch({ number: 2, html_url: "x" });
+      const user = await seedUser();
+      const message = await seedMessage({ authorId: user.id });
+      await prisma.contactMessage.update({
+        where: { id: message.id },
+        data: { forgejoIssueNumber: 5, forgejoIssueUrl: "https://forge.example/ci/repo/issues/5" },
+      });
+      const agent = await adminAgent();
+
+      const res = await agent
+        .post(`/admin/api/contact/${message.id}/forgejo-issue`)
+        .send({ title: "Titre", body: "Corps" });
+
+      expect(res.status).to.equal(409);
+      expect(res.body.code).to.equal(ErrorCode.CONTACT_MESSAGE_ALREADY_LINKED);
+    });
+
+    it("leaves the message untouched when the Forgejo call fails (502)", async function () {
+      if (!adminSecretConfigured || !forgejoConfigured) {
+        // biome-ignore lint/suspicious/noExplicitAny: mocha's `this.skip()` isn't typed here.
+        (this as any).skip();
+        return;
+      }
+      stubForgejoFetch("upstream boom", 500);
+      const user = await seedUser();
+      const message = await seedMessage({ authorId: user.id });
+      const agent = await adminAgent();
+
+      const res = await agent
+        .post(`/admin/api/contact/${message.id}/forgejo-issue`)
+        .send({ title: "Titre", body: "Corps" });
+
+      expect(res.status).to.equal(502);
+      expect(res.body.code).to.equal(ErrorCode.FORGEJO_REQUEST_FAILED);
+
+      const row = await prisma.contactMessage.findFirstOrThrow({ where: { id: message.id } });
+      expect(row.forgejoIssueNumber).to.equal(null);
+      expect(row.forgejoIssueUrl).to.equal(null);
+    });
+
+    it("rejects an empty title with 400", async function () {
+      if (!adminSecretConfigured || !forgejoConfigured) {
+        // biome-ignore lint/suspicious/noExplicitAny: mocha's `this.skip()` isn't typed here.
+        (this as any).skip();
+        return;
+      }
+      const user = await seedUser();
+      const message = await seedMessage({ authorId: user.id });
+      const agent = await adminAgent();
+
+      const res = await agent
+        .post(`/admin/api/contact/${message.id}/forgejo-issue`)
+        .send({ title: "   ", body: "Corps" });
+
+      expect(res.status).to.equal(400);
+      expect(res.body.code).to.equal(ErrorCode.VALIDATION_ERROR);
+    });
+  });
 });
--- a/apps/api/test/forgejo.service.test.ts
+++ b/apps/api/test/forgejo.service.test.ts
@ -0,0 +1,113 @@
+import { HttpError } from "@batch-cooking/error-tools";
+import { ErrorCode } from "@batch-cooking/shared";
+import { expect } from "chai";
+import { env } from "../src/config/env.js";
+import { forgejo } from "../src/lib/forgejo/forgejo.service.js";
+
+/**
+ * Stubs `globalThis.fetch` for one test — same approach as
+ * `recipe-sources/the-meal-db.test.ts` (no HTTP-mock library in this repo).
+ * `capture` collects the `(url, init)` each call was made with, so a test
+ * can assert the request shape. Restored by `afterEach`.
+ */
+function stubFetch(
+  responder: (url: string, init: RequestInit | undefined) => Response | Promise<Response>,
+  capture: { url: string; init: RequestInit | undefined }[],
+) {
+  globalThis.fetch = (async (input: string | URL | Request, init?: RequestInit) => {
+    const url = typeof input === "string" ? input : input.toString();
+    capture.push({ url, init });
+    return responder(url, init);
+  }) as typeof fetch;
+}
+
+const configured = forgejo.isConfigured();
+
+describe("ForgejoService", () => {
+  let originalFetch: typeof fetch;
+
+  beforeEach(() => {
+    originalFetch = globalThis.fetch;
+  });
+
+  afterEach(() => {
+    globalThis.fetch = originalFetch;
+  });
+
+  it("isConfigured() reports whether all three FORGEJO_* vars are set", () => {
+    expect(forgejo.isConfigured()).to.equal(
+      env.FORGEJO_BASE_URL !== undefined &&
+        env.FORGEJO_TOKEN !== undefined &&
+        env.FORGEJO_REPO !== undefined,
+    );
+  });
+
+  describe("createIssue", () => {
+    it("POSTs to the repo's issues endpoint with a `token` auth header and { title, body }", async function () {
+      if (!configured) {
+        // biome-ignore lint/suspicious/noExplicitAny: mocha's `this.skip()` isn't typed here.
+        (this as any).skip();
+        return;
+      }
+      const calls: { url: string; init: RequestInit | undefined }[] = [];
+      stubFetch(
+        () =>
+          new Response(JSON.stringify({ number: 42, html_url: "https://forge/x/y/issues/42" }), {
+            status: 201,
+          }),
+        calls,
+      );
+
+      const result = await forgejo.createIssue({ title: "Un titre", body: "Un corps" });
+
+      expect(result).to.deep.equal({ number: 42, htmlUrl: "https://forge/x/y/issues/42" });
+      expect(calls).to.have.lengthOf(1);
+      const [call] = calls;
+      expect(call.url).to.equal(`${env.FORGEJO_BASE_URL}/api/v1/repos/${env.FORGEJO_REPO}/issues`);
+      expect(call.init?.method).to.equal("POST");
+      const headers = call.init?.headers as Record<string, string>;
+      expect(headers.Authorization).to.equal(`token ${env.FORGEJO_TOKEN}`);
+      expect(JSON.parse(String(call.init?.body))).to.deep.equal({
+        title: "Un titre",
+        body: "Un corps",
+      });
+    });
+
+    it("throws 502 FORGEJO_REQUEST_FAILED on a non-2xx response", async function () {
+      if (!configured) {
+        // biome-ignore lint/suspicious/noExplicitAny: mocha's `this.skip()` isn't typed here.
+        (this as any).skip();
+        return;
+      }
+      stubFetch(() => new Response("nope", { status: 403 }), []);
+
+      try {
+        await forgejo.createIssue({ title: "t", body: "b" });
+        expect.fail("expected createIssue to throw");
+      } catch (err) {
+        expect(err).to.be.instanceOf(HttpError);
+        expect((err as HttpError).status).to.equal(502);
+        expect((err as HttpError).code).to.equal(ErrorCode.FORGEJO_REQUEST_FAILED);
+      }
+    });
+
+    it("throws 502 FORGEJO_REQUEST_FAILED on a network error", async function () {
+      if (!configured) {
+        // biome-ignore lint/suspicious/noExplicitAny: mocha's `this.skip()` isn't typed here.
+        (this as any).skip();
+        return;
+      }
+      stubFetch(() => {
+        throw new Error("ECONNREFUSED");
+      }, []);
+
+      try {
+        await forgejo.createIssue({ title: "t", body: "b" });
+        expect.fail("expected createIssue to throw");
+      } catch (err) {
+        expect(err).to.be.instanceOf(HttpError);
+        expect((err as HttpError).code).to.equal(ErrorCode.FORGEJO_REQUEST_FAILED);
+      }
+    });
+  });
+});
--- a/apps/web/cypress/e2e/admin-messages.cy.ts
+++ b/apps/web/cypress/e2e/admin-messages.cy.ts
@ -1,6 +1,6 @@
 // Mocks the admin API via cy.intercept — no live backend (see
 // .github/workflows/ci.yml); apps/api's Mocha suite covers
-// `GET /admin/api/contact` against a real database.
+// `GET /admin/api/contact` and the Forgejo routes against a real database.

 const adminBody = {
  id: 1,
@ -10,6 +10,10 @@ const adminBody = {
  lastLoginAt: "2026-08-28T09:00:00.000Z",
 };

+// Matches the list endpoint (`/contact`, `/contact?type=…`) but NOT the
+// nested `/contact/forgejo/status` or `/contact/:id/forgejo-issue`.
+const LIST_URL = /\/admin\/api\/contact(\?|$)/;
+
 function messages() {
  return [
    {
@ -21,6 +25,8 @@ function messages() {
      appVersion: "0.2.1",
      createdAt: "2026-09-07T10:00:00.000Z",
      author: { id: 9, firstName: "Alice", lastName: "Martin", email: "alice@example.com" },
+      forgejoIssueNumber: null,
+      forgejoIssueUrl: null,
    },
    {
      id: 1,
@ -31,6 +37,8 @@ function messages() {
      appVersion: null,
      createdAt: "2026-09-06T08:30:00.000Z",
      author: null,
+      forgejoIssueNumber: null,
+      forgejoIssueUrl: null,
    },
  ];
 }
@ -39,12 +47,15 @@ describe("Admin contact messages (/admin/messages)", () => {
  beforeEach(() => {
    cy.viewport(1400, 1000);
    cy.intercept("GET", "**/admin/api/auth/me", { statusCode: 200, body: adminBody });
+    // Default: Forgejo integration off — individual tests override.
+    cy.intercept("GET", "**/admin/api/contact/forgejo/status", {
+      statusCode: 200,
+      body: { enabled: false },
+    }).as("forgejoStatus");
  });

  it("lists the messages read-only: sender or « Compte supprimé », type badge, message", () => {
-    cy.intercept("GET", "**/admin/api/contact*", { statusCode: 200, body: messages() }).as(
-      "getMessages",
-    );
+    cy.intercept("GET", LIST_URL, { statusCode: 200, body: messages() }).as("getMessages");

    cy.visit("/admin/messages");
    cy.wait("@getMessages");
@ -52,8 +63,9 @@ describe("Admin contact messages (/admin/messages)", () => {
    cy.get(".messages-table tbody tr").should("have.length", 2);
    cy.contains(".messages-table tr", "page planning").should("contain.text", "alice@example.com");
    cy.contains(".messages-table tr", "mode hors-ligne").should("contain.text", "Compte supprimé");
-    // No triage controls on the page.
-    cy.get(".messages-table button").should("not.exist");
+    // Integration off ⇒ no create button, and the "not configured" note shows.
+    cy.get(".messages-table__ticket-button").should("not.exist");
+    cy.contains(".messages-forgejo-note", "non configurée").should("be.visible");
  });

  it("filters by type through the query param", () => {
@ -71,4 +83,77 @@ describe("Admin contact messages (/admin/messages)", () => {
    cy.get(".messages-table tbody tr").should("have.length", 1);
    cy.contains(".messages-table tr", "mode hors-ligne").should("be.visible");
  });
+
+  it("creates a Forgejo issue from a message through the pre-filled modal", () => {
+    cy.intercept("GET", "**/admin/api/contact/forgejo/status", {
+      statusCode: 200,
+      body: { enabled: true },
+    }).as("forgejoStatus");
+    cy.intercept("GET", LIST_URL, { statusCode: 200, body: messages() }).as("getMessages");
+    cy.intercept("POST", "**/admin/api/contact/2/forgejo-issue", {
+      statusCode: 200,
+      body: {
+        ...messages()[0],
+        forgejoIssueNumber: 101,
+        forgejoIssueUrl: "https://git.example/kyuno/batchCooking/issues/101",
+      },
+    }).as("createIssue");
+
+    cy.visit("/admin/messages");
+    cy.wait("@getMessages");
+
+    cy.contains(".messages-table tr", "page planning")
+      .find(".messages-table__ticket-button")
+      .click();
+
+    // Modal opens pre-filled from the message.
+    cy.get("#forgejoIssueTitle").should(
+      "have.value",
+      "[Bug] Le bouton Envoyer ne réagit pas sur la page planning.",
+    );
+    cy.get("#forgejoIssueBody").should("contain.value", "Signalé par");
+
+    cy.contains(".dialog-panel__footer button", "Créer le ticket").click();
+    cy.wait("@createIssue").its("request.body").should("have.keys", ["title", "body"]);
+
+    // Modal closed, the row now shows the link instead of the button.
+    cy.get("#forgejoIssueTitle").should("not.exist");
+    cy.contains(".messages-table tr", "page planning")
+      .find("a")
+      .should("have.attr", "href", "https://git.example/kyuno/batchCooking/issues/101")
+      .and("contain.text", "#101");
+  });
+
+  it("shows the existing link and no create button for an already-linked message", () => {
+    cy.intercept("GET", "**/admin/api/contact/forgejo/status", {
+      statusCode: 200,
+      body: { enabled: true },
+    });
+    const linked = messages().map((m) =>
+      m.id === 2
+        ? {
+            ...m,
+            forgejoIssueNumber: 55,
+            forgejoIssueUrl: "https://git.example/kyuno/batchCooking/issues/55",
+          }
+        : m,
+    );
+    cy.intercept("GET", LIST_URL, { statusCode: 200, body: linked }).as("getMessages");
+
+    cy.visit("/admin/messages");
+    cy.wait("@getMessages");
+
+    cy.contains(".messages-table tr", "page planning").within(() => {
+      cy.contains("a", "#55").should(
+        "have.attr",
+        "href",
+        "https://git.example/kyuno/batchCooking/issues/55",
+      );
+      cy.get(".messages-table__ticket-button").should("not.exist");
+    });
+    // The still-unlinked suggestion row keeps its button.
+    cy.contains(".messages-table tr", "mode hors-ligne")
+      .find(".messages-table__ticket-button")
+      .should("be.visible");
+  });
 });
--- a/apps/web/src/api/admin-client.ts
+++ b/apps/web/src/api/admin-client.ts
@ -6,8 +6,10 @@ import {
  type CatalogPlaceholderGroupView,
  type ContactMessageAdminView,
  type CorrectionAdminView,
+  type CreateForgejoIssueInput,
  type CreateTourScenarioInput,
  ErrorCode,
+  type ForgejoIntegrationStatus,
  type MarkPlaceholdersReviewedInput,
  type MetricsView,
  type PruneOrphansResultView,
@ -229,6 +231,28 @@ export class AdminApiClient {
  public getContactMessages(filters: { type?: string }): Promise<ContactMessageAdminView[]> {
    return this._request(`/contact${query(filters)}`);
  }
+
+  /** Whether the "create a Forgejo issue from a message" feature is configured (issue #81) — drives whether the button is shown. */
+  public getForgejoStatus(): Promise<ForgejoIntegrationStatus> {
+    return this._request("/contact/forgejo/status");
+  }
+
+  /**
+   * Creates a Forgejo issue from contact message `id` with the admin's
+   * edited `title`/`body` (issue #81), and returns the message with its new
+   * `forgejoIssueNumber` / `forgejoIssueUrl`. Rejects with
+   * `FORGEJO_NOT_CONFIGURED` / `CONTACT_MESSAGE_ALREADY_LINKED` /
+   * `FORGEJO_REQUEST_FAILED`.
+   */
+  public createForgejoIssue(
+    id: number,
+    input: CreateForgejoIssueInput,
+  ): Promise<ContactMessageAdminView> {
+    return this._request(`/contact/${id}/forgejo-issue`, {
+      method: "POST",
+      body: JSON.stringify(input),
+    });
+  }
 }

 /** Single shared instance — stateless, same reasoning as apps/web's `apiClient`. */
--- a/apps/web/src/locales/fr/translation.json
+++ b/apps/web/src/locales/fr/translation.json
@ -57,7 +57,11 @@
    "INVALID_CORRECTION_SPAN": "La sélection ne correspond plus au texte de l'étape",
    "INTERNAL_ERROR": "Une erreur est survenue, réessayez plus tard",
    "RETRAIN_ALREADY_RUNNING": "Un ré-entraînement est déjà en cours",
-    "LEFTOVER_QUANTITY_EXCEEDED": "Il ne reste plus assez de portions disponibles"
+    "LEFTOVER_QUANTITY_EXCEEDED": "Il ne reste plus assez de portions disponibles",
+    "CONTACT_MESSAGE_NOT_FOUND": "Ce message n'existe pas",
+    "CONTACT_MESSAGE_ALREADY_LINKED": "Un ticket est déjà lié à ce message",
+    "FORGEJO_NOT_CONFIGURED": "L'intégration Forgejo n'est pas configurée",
+    "FORGEJO_REQUEST_FAILED": "La création du ticket Forgejo a échoué, réessayez plus tard"
  },
  "auth": {
    "login": {
@ -1349,7 +1353,20 @@
        "type": "Type",
        "message": "Message",
        "page": "Page",
-        "userAgent": "Client"
+        "userAgent": "Client",
+        "ticket": "Ticket"
+      },
+      "forgejo": {
+        "notConfigured": "Intégration Forgejo non configurée",
+        "createButton": "Créer un ticket",
+        "linkTitle": "Ouvrir le ticket Forgejo",
+        "modalTitle": "Créer un ticket Forgejo",
+        "titleLabel": "Titre",
+        "bodyLabel": "Corps",
+        "submit": "Créer le ticket",
+        "submitting": "Création…",
+        "cancel": "Annuler",
+        "success": "Ticket #{{number}} créé"
      }
    },
    "catalog": {
--- a/apps/web/src/pages/admin/messages/CreateForgejoIssueModal.tsx
+++ b/apps/web/src/pages/admin/messages/CreateForgejoIssueModal.tsx
@ -0,0 +1,94 @@
+import { type ContactMessageAdminView, ErrorCode } from "@batch-cooking/shared";
+import { useState } from "react";
+import { useTranslation } from "react-i18next";
+import { AdminApiError, adminApiClient } from "../../../api/admin-client";
+import { Dialog } from "../../../components/ui/Dialog";
+import { errorMessageService } from "../../../services/error-message.service";
+import { buildIssueBody, buildIssueTitle } from "./messages";
+
+/**
+ * Pre-filled, editable "create a Forgejo issue from this message" modal
+ * (issue #81). Title/body start from {@link buildIssueTitle} /
+ * {@link buildIssueBody}; the admin adjusts both, then confirms. On success
+ * the parent swaps the row for the returned {@link ContactMessageAdminView}
+ * (now carrying `forgejoIssueNumber` / `forgejoIssueUrl`) and closes this.
+ */
+export function CreateForgejoIssueModal({
+  message,
+  onClose,
+  onCreated,
+}: {
+  message: ContactMessageAdminView;
+  onClose: () => void;
+  onCreated: (updated: ContactMessageAdminView) => void;
+}) {
+  const { t } = useTranslation();
+  const [title, setTitle] = useState(() => buildIssueTitle(message));
+  const [body, setBody] = useState(() => buildIssueBody(message));
+  const [busy, setBusy] = useState(false);
+  const [error, setError] = useState<string | null>(null);
+
+  const canSubmit = title.trim().length > 0 && body.trim().length > 0 && !busy;
+
+  async function submit() {
+    setBusy(true);
+    setError(null);
+    try {
+      const updated = await adminApiClient.createForgejoIssue(message.id, {
+        title: title.trim(),
+        body: body.trim(),
+      });
+      // Parent unmounts this modal via `onCreated` — no need to clear `busy`.
+      onCreated(updated);
+    } catch (err) {
+      setError(
+        errorMessageService.getLabel(
+          err instanceof AdminApiError ? err.code : ErrorCode.INTERNAL_ERROR,
+        ),
+      );
+      setBusy(false);
+    }
+  }
+
+  return (
+    <Dialog
+      title={t("admin.messages.forgejo.modalTitle")}
+      onClose={onClose}
+      className="forgejo-issue-modal"
+      footer={
+        <>
+          <button type="button" onClick={onClose} disabled={busy}>
+            {t("admin.messages.forgejo.cancel")}
+          </button>
+          <button
+            type="button"
+            className="forgejo-issue-modal__submit"
+            onClick={() => void submit()}
+            disabled={!canSubmit}
+          >
+            {busy ? t("admin.messages.forgejo.submitting") : t("admin.messages.forgejo.submit")}
+          </button>
+        </>
+      }
+    >
+      <label htmlFor="forgejoIssueTitle">{t("admin.messages.forgejo.titleLabel")}</label>
+      <input
+        id="forgejoIssueTitle"
+        type="text"
+        value={title}
+        maxLength={255}
+        onChange={(event) => setTitle(event.target.value)}
+      />
+
+      <label htmlFor="forgejoIssueBody">{t("admin.messages.forgejo.bodyLabel")}</label>
+      <textarea
+        id="forgejoIssueBody"
+        value={body}
+        rows={16}
+        onChange={(event) => setBody(event.target.value)}
+      />
+
+      {error && <p className="field-error">{error}</p>}
+    </Dialog>
+  );
+}
--- a/apps/web/src/pages/admin/messages/MessagesPage.tsx
+++ b/apps/web/src/pages/admin/messages/MessagesPage.tsx
@ -4,6 +4,7 @@ import { useTranslation } from "react-i18next";
 import { adminApiClient } from "../../../api/admin-client";
 import "../admin-page.scss";
 import "./messages-page.scss";
+import { CreateForgejoIssueModal } from "./CreateForgejoIssueModal";

 type MessagesState =
  | { status: "loading" }
@ -13,13 +14,36 @@ type MessagesState =
 /**
 * Contact-form messages (issue #80) — a read-only list of the bug reports /
 * suggestions users have sent from `/parametres/contact`, newest first,
- * capped server-side at 200. One optional filter (by `type`); no actions,
- * no triage workflow in this first version.
+ * capped server-side at 200. One optional filter (by `type`).
+ *
+ * Per row (issue #81), when the `FORGEJO_*` integration is configured: a
+ * "Créer un ticket" button that opens a pre-filled modal and, on success,
+ * turns into a `#N` link to the created Forgejo issue. The message itself
+ * stays read-only — the link is the only state a creation adds.
 */
 export function MessagesPage() {
  const { t } = useTranslation();
  const [type, setType] = useState("");
  const [state, setState] = useState<MessagesState>({ status: "loading" });
+  // `null` until the status probe resolves — the ticket column shows nothing
+  // actionable in the meantime.
+  const [forgejoEnabled, setForgejoEnabled] = useState<boolean | null>(null);
+  const [modalFor, setModalFor] = useState<ContactMessageAdminView | null>(null);
+
+  useEffect(() => {
+    let cancelled = false;
+    adminApiClient
+      .getForgejoStatus()
+      .then((status) => {
+        if (!cancelled) setForgejoEnabled(status.enabled);
+      })
+      .catch(() => {
+        if (!cancelled) setForgejoEnabled(false);
+      });
+    return () => {
+      cancelled = true;
+    };
+  }, []);

  useEffect(() => {
    let cancelled = false;
@ -37,6 +61,19 @@ export function MessagesPage() {
    };
  }, [type]);

+  /** Swap one row in place after a Forgejo issue is created from it. */
+  function applyCreatedIssue(updated: ContactMessageAdminView) {
+    setState((prev) =>
+      prev.status === "loaded"
+        ? {
+            status: "loaded",
+            rows: prev.rows.map((row) => (row.id === updated.id ? updated : row)),
+          }
+        : prev,
+    );
+    setModalFor(null);
+  }
+
  return (
    <div className="admin-page">
      <h1 className="admin-page__title">{t("admin.messages.title")}</h1>
@ -54,6 +91,9 @@ export function MessagesPage() {
            ))}
          </select>
        </label>
+        {forgejoEnabled === false && (
+          <p className="messages-forgejo-note">{t("admin.messages.forgejo.notConfigured")}</p>
+        )}
      </div>

      {state.status === "loading" && (
@ -76,6 +116,7 @@ export function MessagesPage() {
                <th>{t("admin.messages.col.message")}</th>
                <th>{t("admin.messages.col.page")}</th>
                <th>{t("admin.messages.col.userAgent")}</th>
+                <th>{t("admin.messages.col.ticket")}</th>
              </tr>
            </thead>
            <tbody>
@ -107,12 +148,42 @@ export function MessagesPage() {
                  <td className="messages-table__ua" title={row.userAgent ?? undefined}>
                    {row.userAgent ?? "—"}
                  </td>
+                  <td className="messages-table__ticket">
+                    {row.forgejoIssueNumber !== null && row.forgejoIssueUrl !== null ? (
+                      <a
+                        href={row.forgejoIssueUrl}
+                        target="_blank"
+                        rel="noreferrer"
+                        title={t("admin.messages.forgejo.linkTitle")}
+                      >
+                        #{row.forgejoIssueNumber}
+                      </a>
+                    ) : forgejoEnabled ? (
+                      <button
+                        type="button"
+                        className="messages-table__ticket-button"
+                        onClick={() => setModalFor(row)}
+                      >
+                        {t("admin.messages.forgejo.createButton")}
+                      </button>
+                    ) : (
+                      "—"
+                    )}
+                  </td>
                </tr>
              ))}
            </tbody>
          </table>
        </div>
      )}
+
+      {modalFor && (
+        <CreateForgejoIssueModal
+          message={modalFor}
+          onClose={() => setModalFor(null)}
+          onCreated={applyCreatedIssue}
+        />
+      )}
    </div>
  );
 }
--- a/apps/web/src/pages/admin/messages/messages-page.scss
+++ b/apps/web/src/pages/admin/messages/messages-page.scss
@ -86,6 +86,108 @@
    color: var(--color-text-muted);
    font-size: var(--font-size-xs);
  }
+
+  &__ticket {
+    white-space: nowrap;
+  }
+
+  // "Créer un ticket" — a compact secondary action, same language as the
+  // corrections table's inline buttons.
+  &__ticket-button {
+    padding: var(--space-xs) var(--space-sm);
+    font-family: var(--font-body);
+    font-size: var(--font-size-xs);
+    font-weight: 600;
+    color: var(--color-text);
+    background: var(--color-surface);
+    border: 1px solid var(--color-border);
+    border-radius: var(--radius-base);
+    cursor: pointer;
+
+    &:hover {
+      border-color: var(--color-primary);
+      color: var(--color-primary);
+    }
+  }
+}
+
+// "Intégration Forgejo non configurée" — a quiet note next to the filter,
+// shown only when the FORGEJO_* env isn't set.
+.messages-forgejo-note {
+  margin: 0;
+  align-self: end;
+  font-size: var(--font-size-xs);
+  color: var(--color-text-muted);
+  font-style: italic;
+}
+
+.messages-badge {
+  display: inline-block;
+  padding: 0.1rem 0.5rem;
+  border-radius: var(--radius-base);
+  font-size: var(--font-size-xs);
+  font-weight: 600;
+  background: var(--color-surface-alt);
+  color: var(--color-text);
+  border-left: 3px solid var(--color-border);
+
+  &--bug {
+    border-left-color: var(--color-error);
+  }
+  &--suggestion {
+    border-left-color: var(--color-accent);
+  }
+  &--other {
+    border-left-color: var(--color-border);
+  }
+}
+
+// Create-issue modal — the `Dialog` primitive supplies the panel/scroll;
+// this only sizes the two fields and the footer actions.
+.forgejo-issue-modal {
+  &.dialog-panel {
+    max-width: 44rem;
+    width: 100%;
+  }
+
+  label {
+    display: block;
+    margin: var(--space-sm) 0 var(--space-xs);
+    font-size: var(--font-size-sm);
+    font-weight: 600;
+  }
+
+  input,
+  textarea {
+    width: 100%;
+    padding: var(--space-sm);
+    font-family: var(--font-body);
+    font-size: var(--font-size-sm);
+    color: var(--color-text);
+    background: var(--color-background);
+    border: 1px solid var(--color-border);
+    border-radius: var(--radius-base);
+  }
+
+  textarea {
+    font-family: var(--font-mono);
+    resize: vertical;
+    min-height: 12rem;
+  }
+
+  .field-error {
+    margin-top: var(--space-sm);
+  }
+
+  &__submit {
+    color: #fff;
+    background: var(--color-primary);
+    border-color: var(--color-primary);
+
+    &:hover:not(:disabled) {
+      opacity: 0.9;
+    }
+  }
 }

 .messages-badge {
--- a/apps/web/src/pages/admin/messages/messages.ts
+++ b/apps/web/src/pages/admin/messages/messages.ts
@ -0,0 +1,51 @@
+import type { ContactMessageAdminView } from "@batch-cooking/shared";
+
+// Pure helpers for MessagesPage's "create a Forgejo issue" modal (issue
+// #81) — kept out of the .tsx so they're unit-testable and the component
+// stays declarative. They produce the *pre-filled* title/body; the admin
+// edits both before confirming, so these are a sensible starting point,
+// not a final format. French strings are inlined on purpose: the output is
+// a payload for a French-language Forgejo repo, not localized app UI.
+
+const TYPE_PREFIX: Record<ContactMessageAdminView["type"], string> = {
+  bug: "[Bug]",
+  suggestion: "[Suggestion]",
+  other: "[Autre]",
+};
+
+/** Comfortably under Forgejo's 255-char title cap — the admin can still lengthen it. */
+const TITLE_MAX = 100;
+
+/** `[Bug] <first non-empty line of the message, trimmed>`. */
+export function buildIssueTitle(message: ContactMessageAdminView): string {
+  const firstLine =
+    message.message
+      .split("\n")
+      .map((line) => line.trim())
+      .find((line) => line.length > 0) ?? message.message.trim();
+  const prefix = TYPE_PREFIX[message.type];
+  const room = TITLE_MAX - prefix.length - 1;
+  const snippet = firstLine.length > room ? `${firstLine.slice(0, room - 1)}…` : firstLine;
+  return `${prefix} ${snippet}`;
+}
+
+/** The message text, then a `---` block of triage context, then a footer line. */
+export function buildIssueBody(message: ContactMessageAdminView): string {
+  const sender = message.author
+    ? `${message.author.firstName} ${message.author.lastName} <${message.author.email}>`
+    : "compte supprimé";
+  return [
+    message.message.trim(),
+    "",
+    "---",
+    "",
+    `**Signalé par :** ${sender}`,
+    `**Type :** ${message.type}`,
+    `**Page :** ${message.pageUrl ?? "—"}`,
+    `**Version de l'app :** ${message.appVersion ?? "—"}`,
+    `**Navigateur :** ${message.userAgent ?? "—"}`,
+    `**Reçu le :** ${new Date(message.createdAt).toLocaleString("fr-FR")}`,
+    "",
+    "🤖 Créé depuis le formulaire de contact",
+  ].join("\n");
+}
--- a/packages/shared/src/errors/error-codes.ts
+++ b/packages/shared/src/errors/error-codes.ts
@ -81,10 +81,18 @@ export enum ErrorCode {
  TOUR_TARGET_NOT_FOUND = 4054,
  /** `POST /admin/api/tours` was given a `key` already used by another scenario. */
  TOUR_KEY_ALREADY_IN_USE = 4025,
+  /** `POST /admin/api/contact/:id/forgejo-issue` on a message that already has a linked Forgejo issue (`forgejoIssueNumber` set). */
+  CONTACT_MESSAGE_ALREADY_LINKED = 4026,
  /** A tech-step correction's `start`/`end` span falls outside the target step's `description`, or `start >= end`. */
  INVALID_CORRECTION_SPAN = 4002,
+  /** `POST /admin/api/contact/:id/forgejo-issue` (or a future contact-message admin route) given an id that doesn't match any `ContactMessage`. */
+  CONTACT_MESSAGE_NOT_FOUND = 4055,
  /** Unexpected/unhandled failure — the catch-all, always logged server-side. */
  INTERNAL_ERROR = 5000,
+  /** `POST /admin/api/contact/:id/forgejo-issue` while the `FORGEJO_*` env vars aren't all set — the integration fails closed (see `ForgejoService`). */
+  FORGEJO_NOT_CONFIGURED = 5001,
+  /** The call to Forgejo's issue API failed — network error or a non-2xx response. */
+  FORGEJO_REQUEST_FAILED = 5002,
 }

 /**
--- a/packages/shared/src/schemas/contact.ts
+++ b/packages/shared/src/schemas/contact.ts
@ -42,3 +42,23 @@ export const listContactMessagesQuerySchema = z.object({
  type: z.enum(CONTACT_MESSAGE_TYPES).optional(),
 });
 export type ListContactMessagesQuery = z.infer<typeof listContactMessagesQuerySchema>;
+
+/**
+ * Body of `POST /admin/api/contact/:id/forgejo-issue` (issue #81). The
+ * admin edits both fields in a pre-filled modal before confirming — the
+ * server sends them to Forgejo verbatim. `title`'s 255 ceiling is Forgejo's
+ * own issue-title limit.
+ */
+export const createForgejoIssueSchema = z.object({
+  title: z
+    .string()
+    .trim()
+    .min(1, "Le titre est obligatoire")
+    .max(255, "Le titre ne peut pas dépasser 255 caractères"),
+  body: z
+    .string()
+    .trim()
+    .min(1, "Le corps est obligatoire")
+    .max(60000, "Le corps ne peut pas dépasser 60000 caractères"),
+});
+export type CreateForgejoIssueInput = z.infer<typeof createForgejoIssueSchema>;
--- a/packages/shared/src/types/contact.ts
+++ b/packages/shared/src/types/contact.ts
@ -22,4 +22,20 @@ export interface ContactMessageAdminView {
    lastName: string;
    email: string;
  } | null;
+  /**
+   * The Forgejo issue an admin created from this message (issue #81), or
+   * `null` if none yet. Both fields are set together. `forgejoIssueUrl` is
+   * the issue's html URL, stored verbatim.
+   */
+  forgejoIssueNumber: number | null;
+  forgejoIssueUrl: string | null;
+}
+
+/**
+ * Whether the "create a Forgejo issue from a message" feature is usable —
+ * `GET /admin/api/contact/forgejo/status` (issue #81). `false` when the
+ * `FORGEJO_*` env vars aren't all set; the admin UI then hides the button.
+ */
+export interface ForgejoIntegrationStatus {
+  enabled: boolean;
 }
--- a/specs/backend-architecture.md
+++ b/specs/backend-architecture.md
@ -533,8 +533,32 @@ ci-dessus) :
  champs du message + `author: { id, firstName, lastName, email } | null`
  (`null` = compte supprimé depuis l'envoi, `authorId` étant
  `onDelete: SetNull`).
- **Lecture seule** : pas de route d'écriture, pas de workflow de traitement
-  (statut / assignation / note) dans cette première version.
+- **Lecture seule** côté message : le message lui-même n'est jamais muté,
+  pas de statut / assignation / note.
+- `POST /admin/api/contact/:id/forgejo-issue` (issue #81) — crée une issue
+  Forgejo depuis le message (`title` / `body` du schéma
+  `createForgejoIssueSchema`, édités par l'admin dans une modale
+  pré-remplie ; **aucun label** — l'admin les pose ensuite dans Forgejo) et
+  stocke `forgejoIssueNumber` / `forgejoIssueUrl` sur la ligne. Ordre :
+  `503 FORGEJO_NOT_CONFIGURED` → `404 CONTACT_MESSAGE_NOT_FOUND` →
+  `409 CONTACT_MESSAGE_ALREADY_LINKED` → appel Forgejo → écriture BDD. Un
+  échec de l'appel (`502 FORGEJO_REQUEST_FAILED`) **ne touche pas la BDD**
+  (pas d'état partiel). Renvoie le `ContactMessageAdminView` à jour.
+- `GET /admin/api/contact/forgejo/status` → `{ enabled }` — pilote
+  l'affichage du bouton côté admin.
+
+**`ForgejoService`** (`lib/forgejo/forgejo.service.ts`, singleton `forgejo`,
+issue #81) — **première et seule** intégration Forgejo d'`apps/api`.
+`isConfigured()` = les trois `FORGEJO_*` présentes ; `createIssue({ title,
+body })` fait `POST {FORGEJO_BASE_URL}/api/v1/repos/{FORGEJO_REPO}/issues`
+avec l'en-tête `Authorization: token {FORGEJO_TOKEN}` (schéma PAT de
+Forgejo, pas `Bearer`), lit `{ number, html_url }`. Via `fetch` global (même
+approche que `mobile.service.ts` / les adaptateurs de sources ; les tests
+réassignent `globalThis.fetch`). Toute erreur réseau / réponse non-2xx /
+JSON invalide ⇒ `HttpError 502 FORGEJO_REQUEST_FAILED`. **Fail-closed** :
+sans les trois variables d'env (`FORGEJO_BASE_URL` `.url()`, `FORGEJO_TOKEN`
+secret, `FORGEJO_REPO` `owner/repo`, toutes `.optional()` — même posture que
+`ADMIN_JWT_SECRET`), le bouton est masqué et l'endpoint répond `503`.

 ---

--- a/specs/batch-cooking-modele.md
+++ b/specs/batch-cooking-modele.md
@ -428,6 +428,11 @@ message libre. Écrit une fois, jamais modifié ensuite ; consulté en
 - `pageUrl` / `userAgent` / `appVersion` : contexte technique capturé à
  l'envoi, tous nullables. `userAgent` est lu de l'en-tête de requête côté
  API, jamais du corps.
+- `forgejoIssueNumber` / `forgejoIssueUrl` (issue #81) : nullables, posés
+  ensemble quand un admin crée une issue Forgejo depuis le message
+  (`POST /admin/api/contact/:id/forgejo-issue`). Non-null ⇒ le bouton
+  « Créer un ticket » disparaît (un message ⇒ au plus une issue).
+  `forgejoIssueUrl` est l'URL html stockée telle quelle.
 - `@@index([createdAt])` — la vue admin trie par date décroissante.

 ---