fix: side peek des bases repasse en vanilla JS + largeur 1100px standard (v7.49.0)

- Panneau peek: les bindings Alpine (x-data absent du conteneur) rendaient
  loovverture et le redimensionnement inoperants -> cblage direct sur le document.
- Helper unique window.fdWirePeekResize (app.js): pointer capture, 300px-90vw,
  clic=fermer, largeur persiste fd_peek_width partagee entre les 4 peeks.
- database-table-container margin:0 (tableau colle a gauche, marge Library).
- .lib-container remonte dans app.css (trash etait pleine largeur), .db-index 1100px.
- ObsiGate verifie sans code: creation .xlsx OK (openpyxl, #186).

app/templates/agent_panel.html

@@ -2,12 +2,19 @@
 <style>
 #fd-agent-fab{position:fixed;right:22px;bottom:22px;width:54px;height:54px;border-radius:50%;background:var(--text-primary,#37352F);color:var(--bg-primary,#fff);border:none;cursor:pointer;box-shadow:0 8px 26px rgba(0,0,0,.35);display:flex;align-items:center;justify-content:center;z-index:1700;transition:transform .15s,box-shadow .15s}
 #fd-agent-fab:hover{transform:scale(1.06);box-shadow:0 12px 34px rgba(0,0,0,.45)}
-#fd-agent-panel{position:fixed;top:0;right:0;bottom:0;width:470px;max-width:100vw;background:var(--bg-primary,#191919);border-left:1px solid var(--border,rgba(255,255,255,.1));z-index:1850;display:flex;flex-direction:column;box-shadow:-16px 0 48px rgba(0,0,0,.55);transform:translateX(102%);transition:transform .24s cubic-bezier(.16,1,.3,1)}
+#fd-agent-panel{position:fixed;top:0;right:0;bottom:0;width:var(--fd-agent-width,470px);max-width:100vw;background:var(--bg-primary,#191919);border-left:1px solid var(--border,rgba(255,255,255,.1));z-index:1850;display:flex;flex-direction:column;box-shadow:-16px 0 48px rgba(0,0,0,.55);transform:translateX(102%);transition:transform .24s cubic-bezier(.16,1,.3,1)}
 #fd-agent-panel.open{transform:translateX(0)}
 #fd-agent-panel ::-webkit-scrollbar{width:8px;height:8px}
 #fd-agent-panel ::-webkit-scrollbar-thumb{background:rgba(128,128,128,.35);border-radius:4px}
 #fd-agent-panel ::-webkit-scrollbar-track{background:transparent}
 
+/* Resize handle (left edge) */
+.fd-ap-resize{position:absolute;top:0;bottom:0;left:0;width:6px;cursor:col-resize;z-index:5}
+.fd-ap-resize::before{content:"";position:absolute;top:0;bottom:0;left:2px;width:2px;background:transparent;border-radius:2px;transition:background .12s ease}
+.fd-ap-resize:hover::before,body.fd-ap-resizing .fd-ap-resize::before{background:var(--accent,#2383E2)}
+body.fd-ap-resizing{cursor:col-resize!important;user-select:none}
+body.fd-ap-resizing *{cursor:col-resize!important}
+
 /* Header */
 .fd-ap-head{display:flex;align-items:center;gap:12px;padding:16px 18px 12px}
 .fd-ap-logo{width:36px;height:36px;border-radius:50%;background:var(--text-primary,#37352F);color:var(--bg-primary,#fff);display:flex;align-items:center;justify-content:center;flex-shrink:0;box-shadow:0 2px 8px rgba(0,0,0,.25)}
@@ -189,7 +196,7 @@
 .fd-agent-msg-markdown ul,.fd-agent-msg-markdown ol{margin:0 0 8px;padding-left:20px}
 .fd-agent-msg-markdown li{margin:2px 0}
 .fd-agent-msg-markdown code{background:rgba(127,127,127,.18);border-radius:4px;padding:1px 5px;font-family:ui-monospace,SFMono-Regular,Menlo,monospace;font-size:.9em}
-.fd-agent-msg-markdown pre{background:var(--bg-code,#111);border:1px solid var(--border,#333);border-radius:8px;padding:12px;overflow-x:auto;margin:8px 0}
+.fd-agent-msg-markdown pre{background:var(--bg-code,var(--bg-tertiary,#1f1f1f));border:1px solid var(--border,rgba(255,255,255,.12));border-radius:8px;padding:12px;overflow-x:auto;margin:8px 0;color:var(--text,#ececec)}
 .fd-agent-msg-markdown pre code{background:none;padding:0;font-size:12px;line-height:1.5}
 .fd-md-table-wrap{overflow-x:auto;margin:8px 0}
 .fd-md-table{border-collapse:collapse;width:100%;font-size:13px}
@@ -211,6 +218,7 @@
 
 {# ── Panel ── #}
 <div id="fd-agent-panel" class="fd-ap" :class="{open: open}" x-data="agentPanel()" @keydown.escape.window="close()" role="dialog" aria-label="Agent FlowDeck">
+  <div class="fd-ap-resize" x-ref="resizeHandle" role="separator" aria-orientation="vertical" aria-label="Redimensionner le panneau" tabindex="0" title="Glisser pour redimensionner — double-clic pour réinitialiser"></div>
   <div class="fd-ap-head">
     <span class="fd-ap-logo"><svg viewBox="0 0 24 24" width="19" height="19" fill="currentColor" aria-hidden="true"><path d="M12 3l1.9 5.8a2 2 0 0 0 1.3 1.3L21 12l-5.8 1.9a2 2 0 0 0-1.3 1.3L12 21l-1.9-5.8a2 2 0 0 0-1.3-1.3L3 12l5.8-1.9a2 2 0 0 0 1.3-1.3L12 3Z"/></svg></span>
     <div class="fd-ap-head-main">