feat(agent): menu de profils restreint Claude/Codex + retrait custom (D7) — §17

Dernier lot de §17 : seuls les profils pilotables en mode structuré sont
proposés à la sélection/création.

- domain : AgentProfile::is_selectable() = structured_adapter.is_some(),
  source unique de vérité du prédicat.
- infrastructure : AgentSessionFactory::supports délègue à is_selectable
  (supports et is_selectable ne peuvent plus diverger).
- application : selectable_reference_profiles() = reference_profiles()
  filtré ; ReferenceProfiles et FirstRunState exposent la liste filtrée
  (Claude/Codex). reference_profiles() brut reste à 4 (data intacte) ⇒
  un agent Gemini/Aider/custom legacy déjà configuré continue de tourner.
- frontend : bloc AddCustomProfile retiré du wizard first-run, action
  addCustom retirée du viewmodel ; wizard n'affiche que la liste filtrée.

Tests (QA) : is_selectable (table de vérité), cohérence stricte
is_selectable<->supports, liste exposée=2 / data brute=4, garde
anti-régression Vitest sur l'absence du bloc custom — validées par
mutation. cargo test --workspace : 820 passed. npx vitest run : 344 passed.

§17 COMPLET (D0->D7). Suivi restant : D6b (surfacer reply dans le writer
wire .response.json pour la délégation par protocole fichier).

Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>

frontend/src/features/first-run/FirstRunWizard.tsx

@@ -1,31 +1,24 @@
 /**
  * First-run wizard (L5). Shown on the very first IDE launch: it offers the
- * pre-filled reference profiles (Claude/Codex/Gemini/Aider) with **editable**
- * commands, lets the user detect which CLIs are installed (✓/✗), add a **custom**
- * profile, then saves the chosen profiles and closes the first run.
+ * pre-filled, selectable reference profiles (Claude/Codex — only AIs drivable in
+ * structured mode, §17.6/D7) with **editable** commands, lets the user detect
+ * which CLIs are installed (✓/✗), then saves the chosen profiles and closes the
+ * first run.
+ *
+ * The candidate list is already filtered server-side (`reference_profiles` only
+ * exposes selectable profiles), so the wizard renders whatever it receives.
+ * Adding an arbitrary custom profile is no longer offered, since we cannot drive
+ * it in structured mode.
  *
  * Pure presentation: all behaviour comes from {@link useFirstRun} (the
- * {@link ProfileGateway} port). Custom-profile validation is the pure logic in
+ * {@link ProfileGateway} port). Profile validation is the pure logic in
  * `./profile`.
  */
 
-import { useState } from "react";
-
-import type { AgentProfile, InjectionStrategy } from "@/domain";
+import type { AgentProfile } from "@/domain";
 import { Button, IconButton, Input, Panel, Toolbar, cn } from "@/shared";
 import { useFirstRun, type WizardEntry } from "./useFirstRun";
-import {
-  defaultInjection,
-  emptyCustomProfile,
-  isProfileValid,
-  parseArgs,
-  validateProfile,
-} from "./profile";
-
-/** Shared classes for the native `<select>` so it matches the Input control. */
-const SELECT_CLASS =
-  "h-9 w-full rounded-md border border-border bg-raised px-3 text-sm text-content " +
-  "outline-none focus:border-primary";
+import { parseArgs, validateProfile } from "./profile";
 
 /** A small caption above a control. */
 function Caption({ children }: { children: React.ReactNode }) {
@@ -67,7 +60,7 @@ export function FirstRunWizard({
           <h2 className="text-base font-semibold text-content">Welcome to IdeA</h2>
           <p className="text-sm text-muted">
             Choose which AI CLIs to configure. Commands are pre-filled and
-            editable; you can also add your own.
+            editable.
           </p>
         </div>
       }
@@ -101,8 +94,6 @@ export function FirstRunWizard({
           ))}
         </ul>
 
-        <AddCustomProfile onAdd={(p) => vm.addCustom(p)} />
-
         <footer className="flex gap-2">
           <Button variant="primary" onClick={() => void finish()} disabled={vm.busy}>
             Save and continue
@@ -186,119 +177,3 @@ function ProfileRow({
     </li>
   );
 }
-
-/** Inline form to add a custom profile, validated before it is accepted. */
-function AddCustomProfile({ onAdd }: { onAdd: (p: AgentProfile) => void }) {
-  const [draft, setDraft] = useState<AgentProfile>(emptyCustomProfile());
-  const errors = validateProfile(draft);
-  const valid = isProfileValid(draft);
-  const ci = draft.contextInjection;
-
-  function submit(e: React.FormEvent) {
-    e.preventDefault();
-    if (!valid) return;
-    onAdd(draft);
-    setDraft(emptyCustomProfile());
-  }
-
-  return (
-    <form
-      onSubmit={submit}
-      aria-label="add custom profile"
-      className="flex flex-col gap-2 rounded-md border border-dashed border-border-strong p-3"
-    >
-      <strong className="text-sm text-content">Add a custom profile</strong>
-
-      <Input
-        aria-label="custom name"
-        placeholder="Name"
-        value={draft.name}
-        onChange={(e) => setDraft({ ...draft, name: e.target.value })}
-      />
-      <Input
-        aria-label="custom command"
-        placeholder="Command (e.g. my-ai)"
-        value={draft.command}
-        onChange={(e) => setDraft({ ...draft, command: e.target.value })}
-      />
-      <Input
-        aria-label="custom args"
-        placeholder="Arguments (space-separated)"
-        value={draft.args.join(" ")}
-        onChange={(e) => setDraft({ ...draft, args: parseArgs(e.target.value) })}
-      />
-
-      <label className="flex flex-col gap-1">
-        <Caption>Context injection</Caption>
-        <select
-          aria-label="injection strategy"
-          className={SELECT_CLASS}
-          value={ci.strategy}
-          onChange={(e) =>
-            setDraft({
-              ...draft,
-              contextInjection: defaultInjection(
-                e.target.value as InjectionStrategy,
-              ),
-            })
-          }
-        >
-          <option value="conventionFile">Convention file</option>
-          <option value="flag">Flag</option>
-          <option value="stdin">Stdin</option>
-          <option value="env">Environment variable</option>
-        </select>
-      </label>
-
-      {ci.strategy === "conventionFile" && (
-        <Input
-          aria-label="injection target"
-          placeholder="Target file (e.g. CONTEXT.md)"
-          value={ci.target}
-          onChange={(e) =>
-            setDraft({
-              ...draft,
-              contextInjection: { strategy: "conventionFile", target: e.target.value },
-            })
-          }
-        />
-      )}
-      {ci.strategy === "flag" && (
-        <Input
-          aria-label="injection flag"
-          placeholder="Flag (e.g. --context-file {path})"
-          value={ci.flag}
-          onChange={(e) =>
-            setDraft({
-              ...draft,
-              contextInjection: { strategy: "flag", flag: e.target.value },
-            })
-          }
-        />
-      )}
-      {ci.strategy === "env" && (
-        <Input
-          aria-label="injection var"
-          placeholder="Env var (e.g. AGENT_CONTEXT_FILE)"
-          value={ci.var}
-          onChange={(e) =>
-            setDraft({
-              ...draft,
-              contextInjection: { strategy: "env", var: e.target.value },
-            })
-          }
-        />
-      )}
-
-      {Object.values(errors).map((msg) => (
-        <small key={msg} className="text-xs text-danger">
-          {msg}
-        </small>
-      ))}
-
-      <Button type="submit" variant="primary" disabled={!valid}>
-        Add custom profile
-      </Button>
-    </form>
-  );
-}