fix(terminal): improve dimension calculation and tab init reliability

- Guarantee minimum 24x80 dimensions on WebSocket open
- Force reflow before init attempts
- Multiple fit attempts with increasing delays (0/50/100/200/400ms)
- Validate saved tabs structure from localStorage
- Resize active tab after closing another tab

💘 Generated with Crush

Assisted-by: GLM-5.1 via Crush <crush@charm.land>

web/src/components/Shell.jsx

@@ -182,9 +182,20 @@ function connectWebSocket(term, fitAddon, initPayload, onStateChange, onFirstMes
   ws.addEventListener('open', () => {
     ws.send(JSON.stringify(initPayload))
     const dims = fitAddon.proposeDimensions()
-    if (dims) {
-      ws.send(JSON.stringify({ type: 'resize', rows: dims.rows, cols: dims.cols }))
+    // Envoyer resize avec dimensions minimales garanties (24x80)
+    const rows = dims?.rows || 24
+    const cols = dims?.cols || 80
+    ws.send(JSON.stringify({ type: 'resize', rows, cols }))
+    // Forcer un fit après l'ouverture
+    setTimeout(() => {
+      try {
+        fitAddon.fit()
+        const newDims = fitAddon.proposeDimensions()
+        if (newDims && newDims.rows > 0 && newDims.cols > 0) {
+          ws.send(JSON.stringify({ type: 'resize', rows: newDims.rows, cols: newDims.cols }))
         }
+      } catch (e) { console.warn('[Shell] fit failed:', e) }
+    }, 50)
     if (onStateChange) onStateChange(true)
   })
 
@@ -232,22 +243,33 @@ export default function Shell({ api }) {
   const settingsRef = useRef({ fontSize: 12, fontFamily: "'JetBrains Mono', 'Fira Code', monospace", theme: 'default' })
   const pendingCommandsRef = useRef({})
 
-  const savedTabs = (() => {
+  const [tabs, setTabs] = useState(() => {
     try {
       const raw = localStorage.getItem(TABS_STORAGE_KEY)
       if (raw) {
         const parsed = JSON.parse(raw)
-        if (Array.isArray(parsed) && parsed.length > 0) {
-          return parsed.map(t => ({ ...t, connected: false }))
+        if (Array.isArray(parsed) && parsed.length > 0 && parsed.length <= MAX_TABS) {
+          return parsed.map((t, i) => ({ 
+            id: t.id || i + 1, 
+            name: t.name || `Tab ${i + 1}`, 
+            type: t.type || 'local', 
+            shell: t.shell || '',
+            host: t.host,
+            port: t.port,
+            user: t.user,
+            key_path: t.key_path,
+            connected: false 
+          }))
         }
       }
-    } catch {}
-    return null
-  })()
-
-  const [tabs, setTabs] = useState(savedTabs || [
+    } catch (e) { 
+      console.warn('[Shell] Failed to parse saved tabs:', e)
+      localStorage.removeItem(TABS_STORAGE_KEY)
+    }
+    return [
       { id: 1, name: 'Local Shell', type: 'local', shell: '', connected: false },
-  ])
+    ]
+  })
   const [activeTab, setActiveTab] = useState(() => {
     if (savedTabs) {
       return savedTabs[0]?.id || 1
@@ -482,36 +504,60 @@ export default function Shell({ api }) {
     let cancelled = false
     const pending = []
 
+    // Forcer le layout à se calculer
+    const forceLayout = () => {
+      const el = document.querySelector('.shell-terminal-col')
+      if (el) {
+        el.style.height = ''
+        el.style.minHeight = ''
+        // Forcer reflow
+        void el.offsetHeight
+      }
+    }
+
     const tryInitTab = (tab, attempt) => {
       if (cancelled) return
-      const shellCol = document.querySelector('.shell-terminal-col')
-      if (!shellCol || shellCol.offsetParent === null) {
-        pending.push(setTimeout(() => tryInitTab(tab, attempt + 1), 200))
+      if (attempt > 20) {
+        console.warn(`[Shell] max attempts reached for tab ${tab.id}`)
         return
       }
+      
+      forceLayout()
+      const shellCol = document.querySelector('.shell-terminal-col')
+      if (!shellCol) {
+        pending.push(setTimeout(() => tryInitTab(tab, attempt + 1), 150))
+        return
+      }
+      
       const container = document.getElementById(`terminal-${tab.id}`)
       if (!container) {
         pending.push(setTimeout(() => tryInitTab(tab, attempt + 1), 100))
         return
       }
-      if (container.offsetHeight === 0) {
+      
+      const rect = container.getBoundingClientRect()
+      if (rect.height < 10 || rect.width < 10) {
         pending.push(setTimeout(() => tryInitTab(tab, attempt + 1), 100))
         return
       }
+      
       if (!tabsRef.current[tab.id]) {
         initTerminal(tab.id, tab)
       }
-      requestAnimationFrame(() => {
+      
+      // Multiple fit attempts avec délais croissants
+      const fitAttempts = [0, 50, 100, 200, 400]
+      fitAttempts.forEach(delay => {
+        setTimeout(() => {
           if (cancelled) return
           const entry = tabsRef.current[tab.id]
-        if (entry) {
+          if (entry && entry.fitAddon) {
+            try {
               entry.fitAddon.fit()
-          setTimeout(() => { if (!cancelled) entry.fitAddon.fit() }, 100)
+            } catch (e) { console.warn(`[Shell] fit attempt ${delay}ms failed:`, e) }
           }
+        }, delay)
       })
-      if (!tabsRef.current[tab.id]) {
-        tryInitTab(tab, 0)
-      }
     }
 
     const wrapper = document.querySelector('.shell-layout')?.parentElement
@@ -650,6 +696,19 @@ export default function Shell({ api }) {
       }
       return next
     })
+
+    // Redimensionner le nouveau tab actif
+    setTimeout(() => {
+      const newActiveTabId = next.length > 0 ? next[next.length - 1].id : null
+      if (newActiveTabId) {
+        const entry = tabsRef.current[newActiveTabId]
+        if (entry && entry.fitAddon) {
+          try {
+            entry.fitAddon.fit()
+          } catch (e) { console.warn('[Shell] fit after close failed:', e) }
+        }
+      }
+    }, 100)
   }
 
   const startRename = (tabId, e) => {