feat(ai): sidebar epuree, suivi visuel des requetes et correctif menu @ (BUG-012, #82)

BUG-012: le menu @ est toujours rendu et _mentionVault() retombe sur le vault de contexte puis le premier vault disponible. #82: suppression des intitules Fournisseur & modele / Fournisseur:, description du contexte General en info-bulle, placeholder retire, bouton Envoyer en emoji, indicateur d'activite (envoi/reception/outils/confirmation/succes/echec), SW_VERSION v5.

frontend/js/ai.js

@@ -139,13 +139,10 @@ async function _buildPickerUI() {
   const wrap = document.createElement('div');
   wrap.className = 'ai-picker';
 
-  // ── Provider select (compact) ──
-  const providerLabel = document.createElement('span');
-  providerLabel.className = 'ai-picker-label';
-  providerLabel.textContent = t('ai.provider') + ':';
-
+  // ── Provider select (compact, no label to keep the toolbar discreet) ──
   const providerSelect = document.createElement('select');
   providerSelect.className = 'ai-picker-select';
+  providerSelect.setAttribute('aria-label', t('ai.provider'));
   const defaultOpt = document.createElement('option');
   defaultOpt.value = '';
   defaultOpt.textContent = t('ai.provider_default');
@@ -445,7 +442,6 @@ async function _buildPickerUI() {
     _renderList();
   }
 
-  wrap.appendChild(providerLabel);
   wrap.appendChild(providerSelect);
   wrap.appendChild(modelSelect);
   wrap.appendChild(combo);

frontend/js/bookslm.js

@@ -107,6 +107,8 @@ class BooksLM {
     this._menuKind = null;
     // Monotonic token used to drop stale async menu renders (fast typing).
     this._menuSeq = 0;
+    // Timer that hides the "done" activity indicator after a short delay.
+    this._activityHideTimer = null;
   }
 
   _readAgentMode() {
@@ -333,6 +335,20 @@ class BooksLM {
     return this._resolveVault();
   }
 
+  /**
+   * Concrete vault used to browse files in the `@` mention menu. Falls back to
+   * the sidebar's selected context vault (then the first vault) so the menu can
+   * list files even in General mode where no vault is otherwise resolved.
+   */
+  _mentionVault() {
+    const resolved = this._contextVault();
+    if (resolved) return resolved;
+    const selected = state.selectedContextVault;
+    if (selected && selected !== 'all') return selected;
+    const first = Array.isArray(state.allVaults) ? state.allVaults[0] : null;
+    return (first && (first.name || first)) || null;
+  }
+
   /** Open a file mentioned in an assistant answer in the main viewer. */
   async _openFileLink(path) {
     const vault = this._resolveVault();
@@ -433,7 +449,9 @@ class BooksLM {
     return {
       icon: 'sparkles',
       title: t('ai.context_general'),
-      subtitle: t('ai.context_general_desc'),
+      // The description is kept for the tooltip only, to keep the header clean.
+      subtitle: '',
+      tooltip: t('ai.context_general_desc'),
     };
   }
 
@@ -468,12 +486,15 @@ class BooksLM {
       </div>
       <div class="bookslm-history-menu hidden"></div>
       <div class="bookslm-toolbar">
-        <span class="bookslm-toolbar-label">${t('ai.model_settings')}</span>
         <span class="bookslm-picker-host"></span>
       </div>
       <div class="bookslm-status"></div>
       <div class="bookslm-suggestions"></div>
       <div class="bookslm-messages"></div>
+      <div class="bookslm-activity hidden" role="status" aria-live="polite">
+        <span class="bookslm-activity-spinner" aria-hidden="true"></span>
+        <span class="bookslm-activity-text"></span>
+      </div>
       <div class="bookslm-attachments"></div>
       <div class="bookslm-menu-layer">
         <div class="bookslm-command-menu hidden" role="listbox" aria-label="${t('ai.commands')}"></div>
@@ -482,8 +503,8 @@ class BooksLM {
       <div class="bookslm-input-area">
         <button class="bookslm-btn-attach" title="${t('ai.attach_image')}" aria-label="${t('ai.attach_image')}"><i data-lucide="image-plus" style="width:18px;height:18px"></i></button>
         <input type="file" class="bookslm-file-input" accept="image/*" multiple hidden>
-        <textarea placeholder="${t('bookslm.placeholder')}" rows="1" aria-label="${t('bookslm.placeholder')}"></textarea>
-        <button class="bookslm-btn-send" title="${t('bookslm.send')}">${t('bookslm.send')}</button>
+        <textarea placeholder="${t('bookslm.placeholder')}" rows="1" aria-label="${t('ai.composer_label')}"></textarea>
+        <button class="bookslm-btn-send" title="${t('bookslm.send')}" aria-label="${t('bookslm.send')}">✈️</button>
       </div>
       <div class="bookslm-input-hint">${t('ai.input_hint')}</div>
     `;
@@ -820,12 +841,7 @@ class BooksLM {
   async _showMentionMenu(query) {
     if (!this._panel) return;
     const seq = ++this._menuSeq;
-    const vault = this._contextVault();
-    if (!vault && !query) {
-      // Nothing to list without a vault; a typed query can still search all.
-      this._hideMenus();
-      return;
-    }
+    const vault = this._mentionVault();
     try {
       let results = [];
       if (query) {
@@ -834,24 +850,25 @@ class BooksLM {
           `/api/tree-search?q=${encodeURIComponent(query)}&vault=${encodeURIComponent(searchVault)}`
         );
         results = (data.results || []).slice(0, 20);
-      } else {
+      } else if (vault) {
         const data = await api(
           `/api/vault/${encodeURIComponent(vault)}/files?limit=20&recursive=true`
         );
-        results = (data.files || []).slice(0, 20).map((f) => ({ path: f.path, type: 'file' }));
+        results = (data.files || []).slice(0, 20).map((f) => ({ path: f.path, type: 'file', vault }));
       }
       if (seq !== this._menuSeq) return; // superseded while the request ran
       const items = results.map((r) => {
         const path = r.path || r;
         const rawType = r.type || (this._classifyPath(path) === 'dir' ? 'dir' : 'file');
         const type = rawType === 'directory' ? 'dir' : rawType;
-        return { id: path, label: path, type, vault: r.vault || null };
+        return { id: path, label: path, type, vault: r.vault || vault || null };
       });
+      // Always render the menu (even empty) so typing `@` gives visible feedback.
       this._renderMenu('mention', items, (item) => this._selectMention(item));
     } catch (e) {
       if (seq !== this._menuSeq) return;
       console.warn('AI assistant: mention search failed', e);
-      this._hideMenus();
+      this._renderMenu('mention', [], () => {});
     }
   }
 
@@ -1185,37 +1202,68 @@ class BooksLM {
   _updateHeader() {
     if (!this._panel) return;
     const meta = this._contextMeta();
+    const titles = this._panel.querySelector('.bookslm-header-titles');
     const title = this._panel.querySelector('.bookslm-title');
     const subtitle = this._panel.querySelector('.bookslm-subtitle');
     const icon = this._panel.querySelector('.bookslm-context-icon i');
     if (title) title.textContent = meta.title;
     if (subtitle) subtitle.textContent = meta.subtitle || '';
+    if (titles) titles.title = meta.tooltip || meta.subtitle || meta.title || '';
     if (icon) icon.setAttribute('data-lucide', meta.icon);
     if (typeof safeCreateIcons === 'function') safeCreateIcons();
   }
 
+  /**
+   * Show the assistant activity state in the panel (visual workflow).
+   * @param {'idle'|'working'|'done'|'error'} kind
+   * @param {string} [text]
+   */
+  _setActivity(kind, text) {
+    if (!this._panel) return;
+    if (this._activityHideTimer) {
+      clearTimeout(this._activityHideTimer);
+      this._activityHideTimer = null;
+    }
+    const el = this._panel.querySelector('.bookslm-activity');
+    if (!el) return;
+    const label = el.querySelector('.bookslm-activity-text');
+    if (label) label.textContent = text || '';
+    el.classList.toggle('hidden', kind === 'idle');
+    el.classList.toggle('working', kind === 'working');
+    el.classList.toggle('done', kind === 'done');
+    el.classList.toggle('error', kind === 'error');
+  }
+
   _updateStatus(data) {
     if (!this._panel) return;
     const status = this._panel.querySelector('.bookslm-status');
     if (!status) return;
 
     if (data && data.error) {
+      status.classList.remove('hidden');
       status.innerHTML = `<span class="bookslm-status-error">⚠ ${t('bookslm.no_context')}</span>`;
       return;
     }
     if (data && Array.isArray(data.files)) {
+      if (data.scope === MODE.GENERAL) {
+        // No document context: keep the header clean. The description is
+        // available as a tooltip on the header title.
+        status.classList.add('hidden');
+        status.innerHTML = '';
+        return;
+      }
+      status.classList.remove('hidden');
       const count = data.files.length;
       const chars = data.total_chars || 0;
       const maxChars = data.max_total_chars || 200000;
       const pct = Math.min(100, Math.round((chars / maxChars) * 100));
-      const label = data.scope === MODE.GENERAL
-        ? t('ai.context_general_desc')
-        : `${t('bookslm.files_indexed', { count })}, ${t('bookslm.chars_loaded', { chars: Math.round(chars / 1000) + 'K' })}`;
+      const label = `${t('bookslm.files_indexed', { count })}, ${t('bookslm.chars_loaded', { chars: Math.round(chars / 1000) + 'K' })}`;
       status.innerHTML = `
         <span class="bookslm-status-text">${label}</span>
         <div class="bookslm-context-bar" role="progressbar" aria-valuenow="${pct}" aria-valuemin="0" aria-valuemax="100"><div class="bookslm-context-fill" style="width:${pct}%"></div></div>
       `;
     } else if (this._isLoading) {
+      status.classList.remove('hidden');
       status.textContent = '⏳ …';
     }
   }
@@ -1630,6 +1678,7 @@ class BooksLM {
     if (sendBtn) sendBtn.disabled = true;
 
     this._abortCtrl = new AbortController();
+    this._setActivity('working', t('ai.activity_sending'));
 
     try {
       let resp = await this._postChat(payload);
@@ -1643,6 +1692,7 @@ class BooksLM {
         throw new Error(detail);
       }
 
+      this._setActivity('working', t('ai.activity_streaming'));
       await this._streamResponse(resp, assistantMsg, payload);
 
       if (!assistantMsg.sources.length && this._contextFiles.length) {
@@ -1654,10 +1704,15 @@ class BooksLM {
           })
           .map((f) => f.path || f);
       }
+      this._setActivity('done', t('ai.activity_done'));
+      this._activityHideTimer = setTimeout(() => this._setActivity('idle'), 1500);
     } catch (e) {
       if (e.name !== 'AbortError') {
         assistantMsg.content = `⚠ Error: ${e.message}`;
         console.warn('AI assistant chat error:', e);
+        this._setActivity('error', t('ai.activity_error'));
+      } else {
+        this._setActivity('idle');
       }
     }
 
@@ -1714,6 +1769,7 @@ class BooksLM {
 
       if (currentEvent === 'tool') {
         assistantMsg.toolCalls.push({ name: data.name, ok: data.ok !== false, arguments: data.arguments || {} });
+        this._setActivity('working', t('ai.activity_tool', { name: data.name }));
         return;
       }
       if (currentEvent === 'confirmation') {
@@ -1721,15 +1777,20 @@ class BooksLM {
           pending: data.pending || data,
           messages: data.messages || [],
         };
+        this._setActivity('working', t('ai.activity_confirmation'));
         return;
       }
       if (currentEvent === 'error' || data.error) {
         const msg = data.error || t('bookslm.error');
         assistantMsg.content += (assistantMsg.content ? '\n\n' : '') + '⚠ ' + msg;
+        this._setActivity('error', t('ai.activity_error'));
         return;
       }
       const chunk = data.token || data.content || '';
-      if (chunk) assistantMsg.content += chunk;
+      if (chunk) {
+        if (!assistantMsg.content) this._setActivity('working', t('ai.activity_streaming'));
+        assistantMsg.content += chunk;
+      }
       if (data.sources) assistantMsg.sources = data.sources;
     };