fix(terminal): init all tabs on load, fix excessive zoom

Use visibility:hidden instead of display:none for inactive terminal tabs
so xterm containers retain their dimensions. This allows all terminals
to initialize independently and prevents fitAddon from miscalculating
cell sizes on zero-height containers.

💘 Generated with Crush

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

web/src/components/Shell.jsx

@@ -399,10 +399,7 @@ export default function Shell({ api }) {
     })
 
     const onResize = () => {
-      const el = document.getElementById(`terminal-${tabId}`)
-      if (el && el.style.display !== 'none') {
-        fitAddon.fit()
-      }
+      fitAddon.fit()
     }
 
     const resizeObserver = new ResizeObserver(onResize)
@@ -429,27 +426,23 @@ export default function Shell({ api }) {
   }, [])
 
   useEffect(() => {
-    const tab = tabs.find(t => t.id === activeTab)
-    if (!tab) return
-
     let cancelled = false
     const pending = []
 
-    const tryInit = (attempt) => {
-      if (cancelled || attempt > 20) return
+    const tryInitTab = (tab, attempt) => {
+      if (cancelled || attempt > 30) return
       const shellCol = document.querySelector('.shell-terminal-col')
       if (!shellCol || shellCol.offsetParent === null) {
-        pending.push(setTimeout(() => tryInit(attempt + 1), 150))
+        pending.push(setTimeout(() => tryInitTab(tab, attempt + 1), 150))
         return
       }
       const container = document.getElementById(`terminal-${tab.id}`)
       if (!container) {
-        pending.push(setTimeout(() => tryInit(attempt + 1), 100))
+        pending.push(setTimeout(() => tryInitTab(tab, attempt + 1), 100))
         return
       }
-      if (activeTabRef.current !== tab.id) return
-      if (container.offsetHeight === 0 || container.style.display === 'none') {
-        pending.push(setTimeout(() => tryInit(attempt + 1), 100))
+      if (container.offsetHeight === 0) {
+        pending.push(setTimeout(() => tryInitTab(tab, attempt + 1), 100))
         return
       }
       if (!tabsRef.current[tab.id]) {
@@ -457,29 +450,39 @@ export default function Shell({ api }) {
       }
       requestAnimationFrame(() => {
         if (cancelled) return
-        if (activeTabRef.current !== tab.id) return
         const entry = tabsRef.current[tab.id]
         if (entry) entry.fitAddon.fit()
       })
     }
 
-    tryInit(0)
+    for (const tab of tabs) {
+      if (!tabsRef.current[tab.id]) {
+        tryInitTab(tab, 0)
+      }
+    }
+
     return () => {
       cancelled = true
       pending.forEach(clearTimeout)
     }
-  }, [activeTab, initTerminal])
+  }, [tabs, initTerminal])
+
+  useEffect(() => {
+    const entry = tabsRef.current[activeTab]
+    if (entry) {
+      requestAnimationFrame(() => {
+        if (activeTabRef.current === activeTab) {
+          entry.fitAddon.fit()
+        }
+      })
+    }
+  }, [activeTab])
 
   useEffect(() => {
     const iv = setInterval(() => {
-      for (const tab of tabs) {
-        const entry = tabsRef.current[tab.id]
-        if (entry) {
-          const el = document.getElementById(`terminal-${tab.id}`)
-          if (el && el.style.display !== 'none') {
-            entry.fitAddon.fit()
-          }
-        }
+      const entry = tabsRef.current[activeTabRef.current]
+      if (entry) {
+        entry.fitAddon.fit()
       }
     }, 2000)
     return () => clearInterval(iv)
@@ -844,8 +847,7 @@ export default function Shell({ api }) {
             <div
               key={tab.id}
               id={`terminal-${tab.id}`}
-              className="shell-xterm-instance"
-              style={{ display: activeTab === tab.id ? 'block' : 'none' }}
+              className={`shell-xterm-instance${activeTab === tab.id ? ' active' : ''}`}
             />
           ))}
         </div>

web/src/styles/global.css

@@ -386,6 +386,12 @@ input::placeholder { color: var(--text-disabled); }
 .shell-xterm-instance {
   position: absolute;
   inset: 0;
+  visibility: hidden;
+  pointer-events: none;
+}
+.shell-xterm-instance.active {
+  visibility: visible;
+  pointer-events: auto;
 }
 .shell-xterm-instance .xterm { height: 100%; }