feat(web): panneaux IDE Git / Sessions / Groupes

components/ide/GitPanel.vue : CommitPanel ciblant le worktree actif (ide.activeContext), chargement des changements + abonnement disque (watchWorktree) ré-abonné au changement de worktree ; sélection d'un fichier ouvre un onglet diff. SessionsPanel : sessions vivantes -> ouverture dans le dock. GroupsPanel : groupes (getters) avec passerelle vers la vue Groupes.

PrimarySidebar aiguille désormais Explorer/Git/Sessions/Groupes vers ces panneaux (fin des placeholders). vue-tsc + build web verts.

packages/web/src/components/ide/GitPanel.vue

@@ -0,0 +1,94 @@
+<template>
+  <div class="flex h-full min-h-0 flex-col">
+    <template v-if="activeWt">
+      <CommitPanel
+        :repo-id="activeWt.repoId"
+        :wt="activeWt.path"
+        :changes="changes"
+        :git="activeWt.git"
+        :truncated="truncated"
+        :active="activeFile"
+        @select="onSelect"
+        @changed="load"
+      />
+    </template>
+    <div v-else class="flex h-full items-center justify-center p-4">
+      <EmptyState :icon="GitCompare" :title="t('ide.activity.git')" :hint="t('workspace.noFileHint')" />
+    </div>
+  </div>
+</template>
+
+<script setup lang="ts">
+// Panneau Git de l'IDE : cible le worktree actif (ide.activeContext), charge ses changements et
+// s'abonne aux modifications disque. Réutilise CommitPanel (staging, commit, fetch/pull) tel quel.
+import { computed, onBeforeUnmount, ref, watch } from 'vue';
+import { useI18n } from 'vue-i18n';
+import { GitCompare } from '@lucide/vue';
+import type { FileChange } from '@arboretum/shared';
+import { useIdeStore, tabId } from '../../stores/ide';
+import { useWorktreesStore } from '../../stores/worktrees';
+import { gitApi } from '../../lib/git-api';
+import { wsClient } from '../../lib/ws-client';
+import CommitPanel from '../workspace/CommitPanel.vue';
+import EmptyState from '../ui/EmptyState.vue';
+
+const { t } = useI18n();
+const ide = useIdeStore();
+const worktrees = useWorktreesStore();
+
+const changes = ref<FileChange[]>([]);
+const truncated = ref(false);
+
+const activeWt = computed(() => {
+  const c = ide.activeContext;
+  if (!c) return null;
+  return worktrees.worktrees.find((w) => w.repoId === c.repoId && w.path === c.wtPath) ?? null;
+});
+
+const activeFile = computed(() => {
+  const tab = ide.activeTab;
+  const wt = activeWt.value;
+  return tab && wt && tab.repoId === wt.repoId && tab.wtPath === wt.path ? tab.file : null;
+});
+
+async function load(): Promise<void> {
+  const wt = activeWt.value;
+  if (!wt) {
+    changes.value = [];
+    truncated.value = false;
+    return;
+  }
+  try {
+    const res = await gitApi.changes(wt.repoId, wt.path);
+    changes.value = res.changes;
+    truncated.value = res.truncated;
+  } catch {
+    /* worktree transitoire / erreur réseau : on garde l'état précédent */
+  }
+}
+
+function onSelect(sel: { file: string; staged: boolean }): void {
+  const wt = activeWt.value;
+  if (!wt) return;
+  ide.openFile(wt.repoId, wt.path, sel.file, 'diff');
+  ide.setTabView(tabId(wt.repoId, wt.path, sel.file), 'diff', sel.staged);
+}
+
+// (ré)abonnement disque ciblé sur le worktree actif ; rechargement des changements.
+let unwatch: (() => void) | null = null;
+watch(
+  () => activeWt.value?.path,
+  () => {
+    unwatch?.();
+    unwatch = null;
+    void load();
+    const wt = activeWt.value;
+    if (wt) {
+      unwatch = wsClient.watchWorktree(wt.repoId, wt.path, () => void load());
+    }
+  },
+  { immediate: true },
+);
+
+onBeforeUnmount(() => unwatch?.());
+</script>

packages/web/src/components/ide/GroupsPanel.vue

@@ -0,0 +1,32 @@
+<template>
+  <div class="flex h-full min-h-0 flex-col">
+    <div class="flex items-center gap-1 px-3 py-2 text-[11px] font-semibold tracking-wide text-fg-subtle uppercase">
+      {{ t('ide.activity.groups') }}
+      <RouterLink :to="{ name: 'groups' }" class="ml-auto rounded p-0.5 hover:bg-surface-2 hover:text-fg" :title="t('nav.groups')">
+        <ExternalLink :size="12" />
+      </RouterLink>
+    </div>
+    <div class="min-h-0 flex-1 overflow-auto px-1 pb-2">
+      <p v-if="groups.groups.length === 0" class="px-2 py-1 text-xs text-fg-subtle">{{ t('groups.empty') }}</p>
+      <RouterLink
+        v-for="g in groups.groups"
+        :key="g.id"
+        :to="{ name: 'group', params: { id: g.id } }"
+        class="flex items-center gap-2 rounded px-2 py-1 text-xs text-fg-muted hover:bg-surface-2/60"
+      >
+        <Boxes :size="13" class="shrink-0 text-fg-subtle" />
+        <span class="truncate">{{ g.label }}</span>
+        <span class="ml-auto shrink-0 text-[10px] text-fg-subtle">{{ t('groups.repoCount', groups.reposInGroup(g.id).length) }}</span>
+      </RouterLink>
+    </div>
+  </div>
+</template>
+
+<script setup lang="ts">
+import { useI18n } from 'vue-i18n';
+import { Boxes, ExternalLink } from '@lucide/vue';
+import { useGroupsStore } from '../../stores/groups';
+
+const { t } = useI18n();
+const groups = useGroupsStore();
+</script>

packages/web/src/components/ide/PrimarySidebar.vue

@@ -4,32 +4,18 @@
     :style="{ width: `${ide.leftWidth}px` }"
   >
     <ProjectTree v-if="ide.activeActivity === 'explorer'" />
-    <!-- Git / Sessions / Groupes : panneaux dédiés livrés en B6 ; placeholder pour l'instant. -->
+    <GitPanel v-else-if="ide.activeActivity === 'git'" />
-    <div v-else class="flex h-full items-center justify-center p-4">
+    <SessionsPanel v-else-if="ide.activeActivity === 'sessions'" />
-      <EmptyState :icon="placeholder.icon" :title="placeholder.title" :hint="t('ide.comingSoon')" />
+    <GroupsPanel v-else />
-    </div>
   </aside>
 </template>
 
 <script setup lang="ts">
-import { computed } from 'vue';
-import { useI18n } from 'vue-i18n';
-import { Boxes, GitCompare, SquareTerminal } from '@lucide/vue';
 import { useIdeStore } from '../../stores/ide';
 import ProjectTree from './ProjectTree.vue';
-import EmptyState from '../ui/EmptyState.vue';
+import GitPanel from './GitPanel.vue';
+import SessionsPanel from './SessionsPanel.vue';
+import GroupsPanel from './GroupsPanel.vue';
 
-const { t } = useI18n();
 const ide = useIdeStore();
-
-const placeholder = computed(() => {
-  switch (ide.activeActivity) {
-    case 'git':
-      return { icon: GitCompare, title: t('ide.activity.git') };
-    case 'sessions':
-      return { icon: SquareTerminal, title: t('ide.activity.sessions') };
-    default:
-      return { icon: Boxes, title: t('ide.activity.groups') };
-  }
-});
 </script>

packages/web/src/components/ide/SessionsPanel.vue

@@ -0,0 +1,53 @@
+<template>
+  <div class="flex h-full min-h-0 flex-col">
+    <div class="flex items-center gap-1 px-3 py-2 text-[11px] font-semibold tracking-wide text-fg-subtle uppercase">
+      {{ t('ide.activity.sessions') }}
+      <RouterLink :to="{ name: 'sessions' }" class="ml-auto rounded p-0.5 hover:bg-surface-2 hover:text-fg" :title="t('nav.sessions')">
+        <ExternalLink :size="12" />
+      </RouterLink>
+    </div>
+    <div class="min-h-0 flex-1 overflow-auto px-1 pb-2">
+      <p v-if="liveSessions.length === 0" class="px-2 py-1 text-xs text-fg-subtle">{{ t('sessions.empty') }}</p>
+      <button
+        v-for="s in liveSessions"
+        :key="s.id"
+        type="button"
+        class="flex w-full items-center gap-1.5 rounded px-2 py-1 text-left text-xs hover:bg-surface-2/60"
+        :class="ide.activeDockSessionId === s.id ? 'bg-surface-2 text-fg' : 'text-fg-muted'"
+        @click="ide.openTerminal(s.id)"
+      >
+        <SessionStateBadge :session="s" />
+        <span class="truncate font-mono">{{ titleFor(s) }}</span>
+        <span class="ml-auto shrink-0 font-mono text-[10px] text-fg-subtle">{{ s.command }}</span>
+      </button>
+    </div>
+  </div>
+</template>
+
+<script setup lang="ts">
+import { computed } from 'vue';
+import { useI18n } from 'vue-i18n';
+import { ExternalLink } from '@lucide/vue';
+import type { SessionSummary } from '@arboretum/shared';
+import { useIdeStore } from '../../stores/ide';
+import { useSessionsStore } from '../../stores/sessions';
+import { useWorktreesStore } from '../../stores/worktrees';
+import SessionStateBadge from '../SessionStateBadge.vue';
+
+const { t } = useI18n();
+const ide = useIdeStore();
+const sessions = useSessionsStore();
+const worktrees = useWorktreesStore();
+
+const liveSessions = computed(() => sessions.sessions.filter((s) => s.live));
+
+function titleFor(s: SessionSummary): string {
+  const wt = worktrees.worktrees.find((w) => w.path === s.cwd);
+  if (wt) {
+    const repo = worktrees.repos.find((r) => r.id === wt.repoId);
+    const branch = wt.branch ?? wt.head.slice(0, 7);
+    return repo ? `${repo.label} · ${branch}` : branch;
+  }
+  return s.cwd.split('/').filter(Boolean).pop() ?? s.cwd;
+}
+</script>