diff --git a/frontend/src/pages/CausalLab.tsx b/frontend/src/pages/CausalLab.tsx
index acd6eec..487c164 100644
--- a/frontend/src/pages/CausalLab.tsx
+++ b/frontend/src/pages/CausalLab.tsx
@@ -1062,39 +1062,61 @@ function TabLibrary({
 
             {(() => {
               const calib = selected.calibration_json || {}
-              const absorption = calib.absorption_days as number | undefined
-              const decay      = calib.decay_type as string | undefined
-              const conf       = calib.confidence as number | undefined
-              const rationale  = calib.theory_rationale as string | undefined
-              const genAt      = calib.theory_generated_at as string | undefined
+              const absorption  = calib.absorption_days as number | undefined
+              const halfLife    = calib.half_life_days  as number | undefined
+              const lagDays     = calib.lag_days        as number | undefined
+              const decay       = calib.decay_type      as string | undefined
+              const conf        = calib.confidence      as number | undefined
+              const rationale   = calib.theory_rationale as string | undefined
+              const genAt       = calib.theory_generated_at as string | undefined
               return (
                 <div className="space-y-3">
                   {rationale && (
                     <p className="text-xs text-violet-300 italic border-l-2 border-violet-700/60 pl-2">{rationale}</p>
                   )}
-                  <div className="grid grid-cols-2 gap-3">
+                  <div className="grid grid-cols-3 gap-3">
                     <div>
-                      <div className="text-xs text-slate-500 mb-1">Durée absorption (j)</div>
+                      <div className="text-xs text-slate-500 mb-1">Lag (j)</div>
                       <input
-                        type="number" min={1} max={60} step={1}
+                        type="number" min={0} max={30} step={1}
+                        value={lagDays ?? ''}
+                        placeholder="0"
+                        onChange={e => saveTheoryParams({ lag_days: parseInt(e.target.value) || 0 })}
+                        className="w-full bg-dark-800 border border-amber-600/40 rounded px-2 py-1 text-xs text-amber-200 text-center"
+                      />
+                    </div>
+                    <div>
+                      <div className="text-xs text-slate-500 mb-1">Demi-vie t½ (j)</div>
+                      <input
+                        type="number" min={1} max={120} step={1}
+                        value={halfLife ?? ''}
+                        placeholder="—"
+                        onChange={e => saveTheoryParams({ half_life_days: parseInt(e.target.value) || 5 })}
+                        className="w-full bg-dark-800 border border-violet-600/40 rounded px-2 py-1 text-xs text-violet-200 text-center"
+                      />
+                    </div>
+                    <div>
+                      <div className="text-xs text-slate-500 mb-1">Absorption (j)</div>
+                      <input
+                        type="number" min={1} max={180} step={1}
                         value={absorption ?? ''}
                         placeholder="—"
                         onChange={e => saveTheoryParams({ absorption_days: parseInt(e.target.value) || 7 })}
                         className="w-full bg-dark-800 border border-slate-600 rounded px-2 py-1 text-xs text-slate-200 text-center"
                       />
                     </div>
-                    <div>
-                      <div className="text-xs text-slate-500 mb-1">Type de décroissance</div>
-                      <select
-                        value={decay ?? 'exp'}
-                        onChange={e => saveTheoryParams({ decay_type: e.target.value })}
-                        className="w-full bg-dark-800 border border-slate-600 rounded px-2 py-1 text-xs text-slate-200"
-                      >
-                        <option value="step">step — tout ou rien</option>
-                        <option value="linear">linear — déclin linéaire</option>
-                        <option value="exp">exp — déclin exponentiel</option>
-                      </select>
-                    </div>
+                  </div>
+                  <div>
+                    <div className="text-xs text-slate-500 mb-1">Type de décroissance</div>
+                    <select
+                      value={decay ?? 'exp'}
+                      onChange={e => saveTheoryParams({ decay_type: e.target.value })}
+                      className="w-full bg-dark-800 border border-slate-600 rounded px-2 py-1 text-xs text-slate-200"
+                    >
+                      <option value="step">step — tout ou rien</option>
+                      <option value="linear">linear — déclin linéaire</option>
+                      <option value="exp">exp — déclin exponentiel</option>
+                    </select>
                   </div>
                   <div className="flex items-center gap-3 text-xs text-slate-500">
                     {conf !== undefined && (