chore: supprime les derniers restes de l'IA dans les Paramètres

La section « IA Copilot — OpenRouter » annonçait « pour les analyses de
gammes », mais aucun code ne consommait cette clé : elle était décorative.
Supprimée, ainsi que les routes devenues orphelines /api/admin/ai-config,
/api/google-ai/models et /api/openrouter/models.

Nettoyage de l'état correspondant dans la page : clé, liste de modèles,
fournisseur d'IA et modèle Google ne faisaient plus qu'un aller-retour entre le
chargement et l'enregistrement, sans aucune interface pour les modifier.
handleSave n'enregistre donc plus que l'URL de la base.

La règle set-state-in-effect s'est mise à signaler le `setIsMounted` du montage,
inchangé mais devenu analysable une fois le code IA retiré : dérogation locale,
comme dans api-connection-info.tsx, puisque poser l'indicateur au montage est
précisément ce qui évite l'écart d'hydratation.

Co-Authored-By: Claude Opus 5 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01Y26nRZxTR57K7h8yqsF675

src/app/api/admin/ai-config/route.ts

@@ -1,24 +0,0 @@
-import { NextResponse } from "next/server";
-import { auth } from "@/lib/auth";
-import fs from "fs/promises";
-import path from "path";
-
-export async function GET() {
-    const session = await auth();
-    if (!session || (session.user as any)?.role !== "admin") {
-        return NextResponse.json({ error: "Unauthorized" }, { status: 403 });
-    }
-
-    try {
-        const configFile = path.join(process.cwd(), "data", ".db-config.json");
-        const data = await fs.readFile(configFile, "utf-8");
-        const config = JSON.parse(data);
-        return NextResponse.json({
-            provider: config.aiProvider ?? "openrouter",
-            openRouterModel: config.openRouterModel,
-            googleAiModel: config.googleAiModel,
-        });
-    } catch {
-        return NextResponse.json({ provider: "openrouter" });
-    }
-}

src/app/api/google-ai/models/route.ts

@@ -1,61 +0,0 @@
-import { NextRequest, NextResponse } from "next/server";
-import fs from "fs/promises";
-import path from "path";
-
-async function getSavedGoogleKey(): Promise<string | null> {
-    try {
-        const configFile = path.join(process.cwd(), "data", ".db-config.json");
-        const data = await fs.readFile(configFile, "utf-8");
-        const config = JSON.parse(data);
-        return config.googleAiKey ?? null;
-    } catch {
-        return null;
-    }
-}
-
-export async function GET(req: NextRequest) {
-    const apiKey = req.headers.get("x-google-ai-key")
-        || process.env.GOOGLE_AI_KEY
-        || await getSavedGoogleKey();
-
-    if (!apiKey) {
-        return NextResponse.json({ error: "No Google AI key provided" }, { status: 401 });
-    }
-
-    try {
-        const res = await fetch(
-            `https://generativelanguage.googleapis.com/v1beta/models?key=${apiKey}&pageSize=100`,
-            { cache: "no-store" }
-        );
-
-        if (!res.ok) {
-            const err = await res.text();
-            return NextResponse.json({ error: err }, { status: res.status });
-        }
-
-        const data = await res.json();
-
-        // Keep only generative models that support generateContent
-        const models = (data.models as Array<{
-            name: string;
-            displayName: string;
-            supportedGenerationMethods?: string[];
-            description?: string;
-        }>)
-            .filter(m =>
-                m.supportedGenerationMethods?.includes("generateContent") &&
-                !m.name.includes("embedding") &&
-                !m.name.includes("aqa")
-            )
-            .map(m => ({
-                id: m.name.replace("models/", ""),
-                name: m.displayName,
-            }))
-            .sort((a, b) => a.name.localeCompare(b.name, "fr"));
-
-        return NextResponse.json({ models });
-    } catch (err) {
-        const msg = err instanceof Error ? err.message : "Unknown error";
-        return NextResponse.json({ error: msg }, { status: 500 });
-    }
-}

src/app/api/openrouter/models/route.ts

@@ -1,61 +0,0 @@
-import { NextRequest, NextResponse } from "next/server";
-import fs from "fs/promises";
-import path from "path";
-
-async function getSavedOpenRouterKey(): Promise<string | null> {
-    try {
-        const configFile = path.join(process.cwd(), "data", ".db-config.json");
-        const data = await fs.readFile(configFile, "utf-8");
-        const config = JSON.parse(data);
-        return config.openRouterKey ?? null;
-    } catch {
-        return null;
-    }
-}
-
-export async function GET(req: NextRequest) {
-    const apiKey = req.headers.get("x-openrouter-key")
-        || process.env.OPENROUTER_API_KEY
-        || await getSavedOpenRouterKey();
-
-    if (!apiKey) {
-        return NextResponse.json({ error: "No API key provided" }, { status: 401 });
-    }
-
-    try {
-        const res = await fetch("https://openrouter.ai/api/v1/models", {
-            headers: {
-                Authorization: `Bearer ${apiKey}`,
-                "Content-Type": "application/json",
-            },
-            cache: "no-store",
-        });
-
-        if (!res.ok) {
-            return NextResponse.json({ error: "OpenRouter error", status: res.status }, { status: res.status });
-        }
-
-        const data = await res.json();
-
-        // Return simplified list sorted by name
-        const models = (data.data as Array<{ id: string; name: string; pricing?: { prompt: string; completion: string } }>)
-            .map((m) => ({
-                id: m.id,
-                name: m.name,
-                promptPrice: parseFloat(m.pricing?.prompt ?? "0"),
-                completionPrice: parseFloat(m.pricing?.completion ?? "0"),
-                free: parseFloat(m.pricing?.prompt ?? "1") === 0,
-            }))
-            .sort((a, b) => {
-                // Free models first, then alphabetical
-                if (a.free && !b.free) return -1;
-                if (!a.free && b.free) return 1;
-                return a.name.localeCompare(b.name, "fr");
-            });
-
-        return NextResponse.json({ models });
-    } catch (err) {
-        const msg = err instanceof Error ? err.message : "Unknown error";
-        return NextResponse.json({ error: msg }, { status: 500 });
-    }
-}