fixes and build 0.1.0

.helder/config.default.json

@@ -5,7 +5,9 @@
   },
   "editor": {
     "autoSave": false,
-    "tabSize": 4
+    "tabSize": 4,
+    "wordWrap": "markdown",
+    "copyOnSelect": true
   },
   "git": {
     "confirmDiscard": true,
@@ -19,7 +21,40 @@
     "followGitignore": false
   },
   "terminal": {
-    "shell": null
+    "shell": null,
+    "fontFamily": null,
+    "fontSize": null,
+    "lineHeight": 1.7,
+    "letterSpacing": 0,
+    "cursorStyle": "bar",
+    "cursorBlink": true,
+    "boldIsBright": false,
+    "scrollback": 8000,
+    "optionIsMeta": false,
+    "theme": {
+      "background": "#101720",
+      "foreground": "#E4E7E6",
+      "cursor": "#E8913A",
+      "cursorAccent": "#101720",
+      "selectionBackground": "rgba(232,145,58,0.22)",
+      "selectionInactiveBackground": "rgba(232,145,58,0.12)",
+      "black": "#232C39",
+      "red": "#C4741F",
+      "green": "#8FBFB4",
+      "yellow": "#F0B476",
+      "blue": "#8FA9C4",
+      "magenta": "#C3A6CE",
+      "cyan": "#8FC4C4",
+      "white": "#BAC0C0",
+      "brightBlack": "#6C7783",
+      "brightRed": "#E8913A",
+      "brightGreen": "#A6D2C7",
+      "brightYellow": "#F5C79A",
+      "brightBlue": "#A9BFD6",
+      "brightMagenta": "#D6BFDF",
+      "brightCyan": "#A9D6D6",
+      "brightWhite": "#F4F5F4"
+    }
   },
   "session": {
     "restoreOnLaunch": true

docs/design/Helder IDE.dc.html

@@ -70,7 +70,7 @@
         </div>
         <div style="display:flex;align-items:center;gap:4px;flex:none">
           <span style="display:flex;align-items:center;gap:8px;padding:6px 9px;border-radius:2px;font:400 12px/1 'IBM Plex Sans',sans-serif;color:#BAC0C0">Search <span style="font:600 12px/1 'IBM Plex Mono',monospace;color:#E8913A;border:1px solid #232C39;border-radius:2px;padding:4px 6px">⌘F</span></span>
-          <span style="display:flex;align-items:center;gap:8px;padding:6px 9px;border-radius:2px;background:rgba(232,145,58,.10);font:500 12px/1 'IBM Plex Sans',sans-serif;color:#F4F5F4">Auto-fit <span style="font:600 12px/1 'IBM Plex Mono',monospace;color:#E8913A;border:1px solid rgba(232,145,58,.35);border-radius:2px;padding:4px 6px">⌘A</span></span>
+          <span style="display:flex;align-items:center;gap:8px;padding:6px 9px;border-radius:2px;background:rgba(232,145,58,.10);font:500 12px/1 'IBM Plex Sans',sans-serif;color:#F4F5F4">Fluid <span style="font:600 12px/1 'IBM Plex Mono',monospace;color:#E8913A;border:1px solid rgba(232,145,58,.35);border-radius:2px;padding:4px 6px">⌘L</span></span>
           <span style="display:flex;align-items:center;gap:8px;padding:6px 9px;border-radius:2px;font:400 12px/1 'IBM Plex Sans',sans-serif;color:#6C7783">Hidden <span style="font:600 12px/1 'IBM Plex Mono',monospace;color:#6C7783;border:1px solid #232C39;border-radius:2px;padding:4px 6px">⌘.</span></span>
           <span style="display:flex;align-items:center;gap:8px;padding:6px 9px;border-radius:2px;font:400 12px/1 'IBM Plex Sans',sans-serif;color:#BAC0C0">Note <span style="font:600 12px/1 'IBM Plex Mono',monospace;color:#E8913A;border:1px solid #232C39;border-radius:2px;padding:4px 6px">⌘N</span></span>
           <span style="display:flex;align-items:center;gap:8px;padding:6px 9px;border-radius:2px;background:rgba(232,145,58,.10);font:500 12px/1 'IBM Plex Sans',sans-serif;color:#F4F5F4">Git <span style="font:600 12px/1 'IBM Plex Mono',monospace;color:#E8913A;border:1px solid rgba(232,145,58,.35);border-radius:2px;padding:4px 6px">⌘G</span></span>
@@ -558,7 +558,7 @@
         <div style="width:640px;background:#18202B;border:1px solid #232C39;border-radius:4px;overflow:hidden;display:flex;flex-direction:column">
           <div style="height:44px;display:flex;align-items:center;justify-content:flex-end;gap:4px;padding:0 12px;border-bottom:1px solid #232C39">
             <span style="display:flex;align-items:center;gap:8px;padding:6px 9px;border-radius:2px;font:400 12px/1 'IBM Plex Sans',sans-serif;color:#BAC0C0">Search <span style="font:600 12px/1 'IBM Plex Mono',monospace;color:#E8913A;border:1px solid #232C39;border-radius:2px;padding:4px 6px">⌘F</span></span>
-            <span style="display:flex;align-items:center;gap:8px;padding:6px 9px;border-radius:2px;background:rgba(232,145,58,.10);font:500 12px/1 'IBM Plex Sans',sans-serif;color:#F4F5F4">Auto-fit <span style="font:600 12px/1 'IBM Plex Mono',monospace;color:#E8913A;border:1px solid rgba(232,145,58,.35);border-radius:2px;padding:4px 6px">⌘A</span></span>
+            <span style="display:flex;align-items:center;gap:8px;padding:6px 9px;border-radius:2px;background:rgba(232,145,58,.10);font:500 12px/1 'IBM Plex Sans',sans-serif;color:#F4F5F4">Fluid <span style="font:600 12px/1 'IBM Plex Mono',monospace;color:#E8913A;border:1px solid rgba(232,145,58,.35);border-radius:2px;padding:4px 6px">⌘L</span></span>
             <span style="display:flex;align-items:center;gap:8px;padding:6px 9px;border-radius:2px;font:400 12px/1 'IBM Plex Sans',sans-serif;color:#6C7783">Hidden <span style="font:600 12px/1 'IBM Plex Mono',monospace;color:#6C7783;border:1px solid #232C39;border-radius:2px;padding:4px 6px">⌘.</span></span>
             <span style="display:flex;align-items:center;gap:8px;padding:6px 9px;border-radius:2px;font:400 12px/1 'IBM Plex Sans',sans-serif;color:#BAC0C0">Note <span style="font:600 12px/1 'IBM Plex Mono',monospace;color:#E8913A;border:1px solid #232C39;border-radius:2px;padding:4px 6px">⌘N</span></span>
             <span style="display:flex;align-items:center;gap:8px;padding:6px 9px;border-radius:2px;background:rgba(232,145,58,.10);font:500 12px/1 'IBM Plex Sans',sans-serif;color:#F4F5F4">Git <span style="font:600 12px/1 'IBM Plex Mono',monospace;color:#E8913A;border:1px solid rgba(232,145,58,.35);border-radius:2px;padding:4px 6px">⌘G</span></span>
@@ -566,7 +566,7 @@
           <sc-if value="{{ showTooltips }}" hint-placeholder-val="{{ true }}">
             <div style="padding:14px 12px;display:flex;flex-direction:column;gap:10px;align-items:flex-end">
               <div style="max-width:300px;background:#232C39;border:1px solid #3A424C;border-radius:2px;padding:8px 10px;font:400 12px/1.5 'IBM Plex Sans',sans-serif;color:#E4E7E6">Hidden files: <span style="color:#E8913A">hidden</span> — dotfiles excluded from the tree and the search. Click to show.</div>
-              <div style="max-width:300px;background:#232C39;border:1px solid #3A424C;border-radius:2px;padding:8px 10px;font:400 12px/1.5 'IBM Plex Sans',sans-serif;color:#E4E7E6">Auto-fit panels: <span style="color:#E8913A">on</span> — columns re-fit on resize and focus. Click to lock the current sizes.</div>
+              <div style="max-width:300px;background:#232C39;border:1px solid #3A424C;border-radius:2px;padding:8px 10px;font:400 12px/1.5 'IBM Plex Sans',sans-serif;color:#E4E7E6">Column widths: <span style="color:#E8913A">fluid</span> — the columns re-fit on resize and focus. Click to lock them.</div>
               <div style="max-width:300px;background:#232C39;border:1px solid #3A424C;border-radius:2px;padding:8px 10px;font:400 12px/1.5 'IBM Plex Sans',sans-serif;color:#E4E7E6">Project note (.notes.txt) — kept next to this project.</div>
             </div>
           </sc-if>

docs/design/README.md

@@ -168,7 +168,7 @@ toolbar, right-aligned, gap 4px.
 Toolbar toggle: label Sans 12px + keycap. Off = label `#BAC0C0`, no fill. On = fill
 `rgba(232,145,58,.10)`, label `#F4F5F4` 500, keycap border `rgba(232,145,58,.35)`.
 Hidden-files-off is the muted case: label and keycap both `#6C7783`. Toggles:
-Search ⌘F · Auto-fit ⌘A · Hidden ⌘. · Note ⌘N · Git ⌘G · `?` (26px square, 1px border).
+Search ⌘F · Fluid ⌘L · Hidden ⌘. · Note ⌘N · Git ⌘G · `?` (26px square, 1px border).
 
 **Source control column** (236px, `#18202B`, 1px right border)
 Commit box: 52px `#101720` field, 1px `#232C39`, radius 2, placeholder
@@ -291,7 +291,7 @@ with amber glyphs.
 
 **Tooltip** — `#232C39` surface, 1px `#3A424C`, radius 2, padding 8px 10px, max 300px,
 Sans 12px/1.5 `#E4E7E6`. No arrow, no shadow. The current state is named inside the
-sentence in amber ("Hidden files: *hidden* — …", "Auto-fit panels: *on* — …"), then one
+sentence in amber ("Hidden files: *hidden* — …", "Column widths: *fluid* — …"), then one
 sentence saying what a click does.
 
 **Markdown Actual / Preview** — same 34px header on both halves; the segmented control's

src/main/config.ts

@@ -27,7 +27,7 @@ export interface TerminalTheme {
 
 export interface HelderConfig {
   ai: { command: string; autoLaunch: boolean }
-  editor: { autoSave: boolean; tabSize: number; wordWrap: WordWrap }
+  editor: { autoSave: boolean; tabSize: number; wordWrap: WordWrap; copyOnSelect: boolean }
   git: { confirmDiscard: boolean; confirmStage: boolean; confirmUnstage: boolean; defaultDiffMode: DiffMode; refreshInterval: number }
   files: { exclude: string[]; followGitignore: boolean }
   terminal: {
@@ -54,7 +54,7 @@ export interface HelderConfig {
 
 export const DEFAULTS: HelderConfig = {
   ai: { command: 'claude', autoLaunch: true },
-  editor: { autoSave: false, tabSize: 4, wordWrap: 'markdown' },
+  editor: { autoSave: false, tabSize: 4, wordWrap: 'markdown', copyOnSelect: true },
   git: { confirmDiscard: true, confirmStage: false, confirmUnstage: false, defaultDiffMode: 'diff', refreshInterval: 10000 },
   files: { exclude: [], followGitignore: false },
   terminal: {

src/renderer/src/App.tsx

@@ -1,5 +1,5 @@
 /* App shell: 4 resizable columns, keyboard shortcuts, copy-reference */
-import React, { useCallback, useEffect, useMemo, useRef, useState } from 'react'
+import React, { useCallback, useEffect, useLayoutEffect, useMemo, useRef, useState } from 'react'
 import { FileTree, GitPanel, Icon, Tip, groupByDir } from './components'
 import type { ContextTarget } from './components'
 import { Editor, SplitView } from './editor'
@@ -10,6 +10,7 @@ import { ProjectLauncher } from './launcher'
 import type { Menu, Toast } from './overlays'
 import type { DiffSide, FileNode, GitStatus, SymbolLookup } from './types'
 import { useProject, useProjectActions } from './project'
+import { useCopyOnSelect } from './copy-on-select'
 import { HL } from './highlight'
 import { loadSymbols } from './symbols'
 import { rlog } from './log'
@@ -17,6 +18,24 @@ import { loadJson, loadNum, saveJson, saveNum } from './persist'
 
 const NO_COMMITTED = new Set<string>()
 
+/* Read-only panes carry no caret, so ⌘A has to name its own target: the pane
+ * that holds the current selection, else the file viewer. The gutter and the
+ * diff sign are user-select:none, so they stay out of the copied text. */
+const SURFACES = '.editor, .md-view'
+function selectAllSurface(): void {
+  const node = window.getSelection()?.anchorNode ?? null
+  const from = node && (node.nodeType === 1 ? (node as HTMLElement) : node.parentElement)
+  const el = from?.closest(SURFACES)
+    ?? document.querySelector('.split-overlay .editor')
+    ?? document.querySelector('.editor-wrap .editor, .editor-wrap .md-view')
+  if (!el) return
+  const range = document.createRange()
+  range.selectNodeContents(el)
+  const sel = window.getSelection()
+  sel?.removeAllRanges()
+  sel?.addRange(range)
+}
+
 function Splitter({ orientation = 'v', onDelta }: { orientation?: 'v' | 'h'; onDelta: (dx: number, dy: number) => void }): React.ReactElement {
   const [drag, setDrag] = useState(false)
   function down(e: React.MouseEvent): void {
@@ -48,7 +67,7 @@ function RightColumn({ width, active, onFocus }: { width: number; active: boolea
     setTopFrac((f) => Math.max(0.18, Math.min(0.82, (f * h + dy) / h)))
   }
   return (
-    <div className={'col right-col' + (active ? ' panel-active' : '')} style={{ width, flex: '0 0 ' + width + 'px' }} onMouseDownCapture={onFocus}>
+    <div className={'col right-col' + (active ? ' panel-active' : '')} style={{ width, flex: '0 1 ' + width + 'px' }} onMouseDownCapture={onFocus}>
       <div ref={ref} style={{ flex: 1, minHeight: 0, display: 'flex', flexDirection: 'column' }}>
         <div style={{ flex: '0 0 ' + (topFrac * 100) + '%', minHeight: 0, display: 'flex' }}>
           <Terminal kind="agent" />
@@ -188,6 +207,8 @@ export function App(): React.ReactElement {
   //                      focus agent/terminal → Editor 20% / Right 50%
   // Re-applied on resize + focus change; dragging still works in between.
   const FOCUS_RESIZE_BELOW = 1600
+  const SPLITTER_W = 1 // .splitter is a 1px flex track
+  const MIN_EDITOR_W = 280 // Col C never drops below this
   const [focusZone, setFocusZone] = useState<'default' | 'editor' | 'terminal'>('default')
   // Which column currently has focus — drives the active-panel tint and keyboard
   // navigation (arrows move a row cursor in Git/Explorer, ⌘→ opens its menu).
@@ -200,7 +221,7 @@ export function App(): React.ReactElement {
   // Auto panel management: re-fit columns on resize/focus. Manually dragging a
   // splitter switches it off (the user took control); the title-bar toggle
   // turns it back on (and immediately re-fits).
-  const [autoResize, setAutoResize] = useState(true)
+  const [fluid, setFluid] = useState(true)
   const [showHidden, setShowHidden] = useState(false)
   // Col A (Git) visibility. On by default; the title-bar GIT toggle hides the
   // whole column and its splitter, and the editor takes the free width.
@@ -209,7 +230,7 @@ export function App(): React.ReactElement {
   const [treeW, setTreeW] = useState(() => Math.round(window.innerWidth * 0.15))
   const [rightW, setRightW] = useState(() => Math.round(window.innerWidth * 0.3))
   useEffect(() => {
-    if (!autoResize) return
+    if (!fluid) return
     function apply(): void {
       const w = window.innerWidth
       if (w >= FOCUS_RESIZE_BELOW) {
@@ -226,7 +247,29 @@ export function App(): React.ReactElement {
     apply()
     window.addEventListener('resize', apply)
     return () => window.removeEventListener('resize', apply)
-  }, [focusZone, autoResize])
+  }, [focusZone, fluid])
+
+  // Keep the stored widths inside the window. Col A, B and D are pixel tracks and
+  // only Col C absorbs the remainder, so a total wider than the window leaves the
+  // state disagreeing with what CSS shows (the columns carry flex-shrink 1 as the
+  // net) and the next splitter drag jumps. The budget reads window.innerWidth
+  // live, never a state copy: a resize sets the widths and the window size in the
+  // same batch, and a stale copy would scale the new widths against the old size.
+  const [winBump, bumpWin] = useState(0)
+  useEffect(() => {
+    const onResize = (): void => bumpWin((n) => n + 1)
+    window.addEventListener('resize', onResize)
+    return () => window.removeEventListener('resize', onResize)
+  }, [])
+  useLayoutEffect(() => {
+    const budget = window.innerWidth - (showGit ? 3 : 2) * SPLITTER_W - MIN_EDITOR_W
+    const total = (showGit ? gitW : 0) + treeW + rightW
+    if (total <= budget || total <= 0) return
+    const k = Math.max(0, budget) / total
+    if (showGit) setGitW((w) => Math.floor(w * k))
+    setTreeW((w) => Math.floor(w * k))
+    setRightW((w) => Math.floor(w * k))
+  }, [winBump, showGit, gitW, treeW, rightW])
 
   // A hidden Col A must not keep the focus ring or the arrow-key cursor.
   useEffect(() => {
@@ -387,6 +430,8 @@ export function App(): React.ReactElement {
     saveJson(`helder.session:${proj.root}`, { active, tabMode, tabSide })
   }, [active, tabMode, tabSide, proj.root, proj.config.session.restoreOnLaunch])
 
+  useCopyOnSelect(proj.config.editor.copyOnSelect)
+
   function toast(title: string, ref?: string): void {
     const id = lid()
     setToasts((t) => [...t, { id, title, ref }])
@@ -613,23 +658,6 @@ export function App(): React.ReactElement {
     requestAnimationFrame(place)
   }
 
-  // Close the current file view (no tabs anymore — the recent-files list replaces
-  // them). The file stays in history; ⌘W just clears the editor after a dirty check.
-  async function closeTab(path: string): Promise<void> {
-    const buf = buffersRef.current[path]
-    const dirtyNow = buf != null && buf !== (projRef.current.files[path] ?? '')
-    if (dirtyNow) {
-      const bridge = window.helder
-      const choice = bridge
-        ? await bridge.dialog.unsavedClose(path)
-        : (window.confirm(`Discard unsaved changes to ${path}?`) ? 'discard' : 'cancel')
-      if (choice === 'cancel') return
-      if (choice === 'save') writeToDisk(path, buf as string)
-    }
-    setBuffers((b) => { if (b[path] == null) return b; const n = { ...b }; delete n[path]; return n })
-    if (path === active) setActive(null)
-  }
-
   // ---- context menus ----
   // Naming contract: every "Pass on …" action opens the input popup (so the user
   // can attach a note), and its "Copy …" twin sits directly below it. Pass first,
@@ -898,9 +926,6 @@ export function App(): React.ReactElement {
       // ⌘N opens the project note.
       else if (meta && e.key.toLowerCase() === 'n') { e.preventDefault(); setOverlay('notes') }
       else if (meta && e.key.toLowerCase() === 's') { e.preventDefault(); saveActive() }
-      else if (meta && e.key.toLowerCase() === 'w') { e.preventDefault(); if (active) closeTab(active) }
-      // ⌘D deletes the current file (with confirmation).
-      else if (meta && e.key.toLowerCase() === 'd') { e.preventDefault(); if (active) askDelete(active, false) }
       else if (meta && e.key.toLowerCase() === 'm') { e.preventDefault(); cycleMode() }
       // ⌘→ in Git/Explorer opens the selected row's menu; in the editor it passes
       // the current text selection to the agent (else native nav).
@@ -919,10 +944,16 @@ export function App(): React.ReactElement {
         if (hasSelection()) return
         e.preventDefault(); focusCommit()
       }
-      // ⌘A toggles auto-fit (but let native select-all run inside text fields).
+      // ⌘A selects all of one surface. A text field has its own select-all;
+      // outside one we build the range ourselves, because the browser default
+      // would mark every panel and label in the window.
       else if (meta && e.key.toLowerCase() === 'a') {
         if (inField) return
-        e.preventDefault(); setAutoResize((v) => !v)
+        e.preventDefault(); selectAllSurface()
+      }
+      // ⌘L makes the columns fluid again, or locks them at their current width.
+      else if (meta && e.key.toLowerCase() === 'l') {
+        e.preventDefault(); setFluid((v) => !v)
       }
       // ⌘. toggles hidden files. Match on e.code so it fires regardless of layout.
       else if (meta && e.code === 'Period') {
@@ -1025,11 +1056,11 @@ export function App(): React.ReactElement {
               Search <kbd>⌘F</kbd>
             </button>
           </Tip>
-          <Tip text={autoResize
-            ? <>Auto-fit panels: <b>on</b> — columns re-fit on resize and focus. Click to lock the current sizes.</>
-            : <>Auto-fit panels: <b>off</b> — the sizes are locked. Click to re-enable.</>}>
-            <button className={'tb-btn tb-toggle' + (autoResize ? ' on' : '')} onClick={() => setAutoResize((v) => !v)}>
-              Auto-fit <kbd>⌘A</kbd>
+          <Tip text={fluid
+            ? <>Column widths: <b>fluid</b> — the columns re-fit on resize and focus. Click to lock them.</>
+            : <>Column widths: <b>locked</b> — the columns keep their size. Click to make them fluid.</>}>
+            <button className={'tb-btn tb-toggle' + (fluid ? ' on' : '')} onClick={() => setFluid((v) => !v)}>
+              Fluid <kbd>⌘L</kbd>
             </button>
           </Tip>
           <Tip text={showHidden
@@ -1072,7 +1103,7 @@ export function App(): React.ReactElement {
       {/* workbench */}
       <div className="workbench">
         {showGit && (<>
-          <div className={'col' + (activePanel === 'git' ? ' panel-active' : '') + flashClass} style={{ width: gitW, flex: '0 0 ' + gitW + 'px' }}
+          <div className={'col' + (activePanel === 'git' ? ' panel-active' : '') + flashClass} style={{ width: gitW, flex: '0 1 ' + gitW + 'px' }}
             onMouseDownCapture={(e) => { setActivePanel('git'); syncGitSel(e.target) }}
             onMouseOver={(e) => syncGitSel(e.target)}>
             <GitPanel branch={proj.branch} changes={proj.changes} committed={NO_COMMITTED}
@@ -1081,10 +1112,10 @@ export function App(): React.ReactElement {
               onOpen={openFile} onContext={openMenu} activePath={active} activeSide={activeSide} ctxPath={menu?.path ?? null}
               kbdId={activePanel === 'git' ? gitSelRow?.id ?? null : null} />
           </div>
-          <Splitter onDelta={(dx) => { setAutoResize(false); setGitW((w) => clamp(w + dx, 160, 460)) }} />
+          <Splitter onDelta={(dx) => { setFluid(false); setGitW((w) => clamp(w + dx, 160, 460)) }} />
         </>)}
 
-        <div className={'col' + (activePanel === 'tree' ? ' panel-active' : '') + flashClass} style={{ width: treeW, flex: '0 0 ' + treeW + 'px' }}
+        <div className={'col' + (activePanel === 'tree' ? ' panel-active' : '') + flashClass} style={{ width: treeW, flex: '0 1 ' + treeW + 'px' }}
           onMouseDownCapture={(e) => { setActivePanel('tree'); syncTreeSel(e.target) }}
           onMouseOver={(e) => syncTreeSel(e.target)}>
           <div className="phead">Explorer<span className="ct">{proj.name}</span></div>
@@ -1096,7 +1127,7 @@ export function App(): React.ReactElement {
             <div className="tree-body" />
           )}
         </div>
-        <Splitter onDelta={(dx) => { setAutoResize(false); setTreeW((w) => clamp(w + dx, 160, 520)) }} />
+        <Splitter onDelta={(dx) => { setFluid(false); setTreeW((w) => clamp(w + dx, 160, 520)) }} />
 
         <div className={'col editor-col' + (activePanel === 'editor' ? ' panel-active' : '') + flashClass} onMouseDownCapture={() => { setFocusZone('editor'); setActivePanel('editor') }}>
           <Editor active={active} mode={mode} side={activeSide}
@@ -1107,10 +1138,11 @@ export function App(): React.ReactElement {
             flash={lineFlash && lineFlash.path === active ? lineFlash : null}
             bufferText={bufferText(active)} onEdit={onEdit} onSymbol={openSymbol} />
         </div>
-        <Splitter onDelta={(dx) => { setAutoResize(false); setRightW((w) => {
+        <Splitter onDelta={(dx) => { setFluid(false); setRightW((w) => {
           // grow until the editor would drop below ~280px (rather than a fixed cap)
-          const max = Math.max(280, window.innerWidth - (showGit ? gitW : 0) - treeW - 280)
-          return clamp(w - dx, 280, max)
+          const max = Math.max(MIN_EDITOR_W, window.innerWidth - (showGit ? 3 : 2) * SPLITTER_W
+            - (showGit ? gitW : 0) - treeW - MIN_EDITOR_W)
+          return clamp(w - dx, MIN_EDITOR_W, max)
         }) }} />
 
         {/* keyed by root so the PTYs respawn in the new cwd when the project switches */}

src/renderer/src/components.tsx

@@ -133,15 +133,18 @@ function GitRow({ c, activePath, activeSide, ctxPath, kbdId, onOpen, onContext,
   )
 }
 
-/** Split a change list into folder groups, keeping the incoming order. The
- * keyboard cursor walks the same order, so App must flatten with this too. */
+/** Split a change list into folder groups, in order of first appearance. The
+ * keyboard cursor walks the same order, so App must flatten with this too.
+ * git status is not path-sorted, so a folder comes back in separated runs. One
+ * group per folder keeps the header unique, and with it the React key. */
 export function groupByDir(list: Change[]): { dir: string; rows: Change[] }[] {
   const out: { dir: string; rows: Change[] }[] = []
+  const byDir = new Map<string, { dir: string; rows: Change[] }>()
   for (const c of list) {
     const dir = c.path.split('/').slice(0, -1).join('/')
-    const last = out[out.length - 1]
-    if (last && last.dir === dir) last.rows.push(c)
-    else out.push({ dir, rows: [c] })
+    const group = byDir.get(dir)
+    if (group) group.rows.push(c)
+    else { const g = { dir, rows: [c] }; byDir.set(dir, g); out.push(g) }
   }
   return out
 }

src/renderer/src/copy-on-select.ts

@@ -0,0 +1,52 @@
+/* Copy-on-select: a settled selection lands on the clipboard with no keystroke. */
+import { useEffect } from 'react'
+import { rlog } from './log'
+
+/** Text of the settled selection, or '' when there is nothing to copy.
+ * A focused input or textarea keeps its own selection out of the DOM
+ * selection, so read it directly — but only for the code editor. Elsewhere
+ * (search box, commit message) a selection is the start of an edit, and the
+ * clipboard must stay as it is. */
+function selectedText(): string {
+  const el = document.activeElement as HTMLTextAreaElement | HTMLInputElement | null
+  if (el && (el.tagName === 'TEXTAREA' || el.tagName === 'INPUT')) {
+    if (!el.classList.contains('ce-ta')) return ''
+    const from = el.selectionStart ?? 0
+    const to = el.selectionEnd ?? 0
+    return from === to ? '' : el.value.slice(from, to)
+  }
+  return window.getSelection()?.toString() ?? ''
+}
+
+function write(text: string): void {
+  const bridge = window.helder
+  if (bridge && bridge.clipboard) { bridge.clipboard.writeText(text); return }
+  navigator.clipboard?.writeText(text).catch((e) => rlog.warn('copy-on-select', 'clipboard write failed', String(e)))
+}
+
+/** Copies whatever the user selects, the way both terminal panes already do.
+ * The mouse and the keyboard both settle a selection, so listen for the end of
+ * the gesture instead of `selectionchange`, which fires on every pixel of a
+ * drag. */
+export function useCopyOnSelect(enabled: boolean): void {
+  useEffect(() => {
+    if (!enabled) return
+    let last = ''
+    function settle(): void {
+      const text = selectedText()
+      if (!text.trim() || text === last) return
+      last = text
+      write(text)
+    }
+    function onKeyUp(e: KeyboardEvent): void {
+      const selectAll = (e.metaKey || e.ctrlKey) && e.key.toLowerCase() === 'a'
+      if (e.shiftKey || selectAll) settle()
+    }
+    document.addEventListener('mouseup', settle)
+    document.addEventListener('keyup', onKeyUp)
+    return () => {
+      document.removeEventListener('mouseup', settle)
+      document.removeEventListener('keyup', onKeyUp)
+    }
+  }, [enabled])
+}

src/renderer/src/overlays.tsx

@@ -501,10 +501,9 @@ const SHORTCUTS: { group: string; rows: { keys: string[]; label: string }[] }[]
     group: 'File',
     rows: [
       { keys: ['⌘', 'S'], label: 'Save this file' },
-      { keys: ['⌘', 'W'], label: 'Close this file' },
-      { keys: ['⌘', 'D'], label: 'Delete this file' },
       { keys: ['⌘', '.'], label: 'Hidden files on or off' },
-      { keys: ['⌘', 'A'], label: 'Auto-fit panels on or off' },
+      { keys: ['⌘', 'A'], label: 'Select all in this pane' },
+      { keys: ['⌘', 'L'], label: 'Fluid columns on or off' },
       { keys: ['Esc'], label: 'Close an overlay or a split view' },
     ],
   },

src/renderer/src/styles.css

@@ -169,7 +169,7 @@ kbd { flex:0 0 auto; font-family:var(--mono); font-size:12px; font-weight:600; c
 .tb-toggle.muted, .tb-toggle.muted kbd { color:var(--fg-3); }
 .tb-toggle.muted:hover { color:var(--fg-2); }
 
-.workbench { flex:1; display:flex; min-height:0; }
+.workbench { flex:1; display:flex; min-height:0; overflow:hidden; }
 
 /* --col-bg holds each column's resting background so the ⌘R flash below can
    animate back to it, whichever state the column is in. */
@@ -500,7 +500,10 @@ kbd { flex:0 0 auto; font-family:var(--mono); font-size:12px; font-weight:600; c
 .ln-code .token.deleted,.ce-pre .token.deleted{color:var(--del);} .ln-code .token.inserted,.ce-pre .token.inserted{color:var(--add);}
 
 /* ============ terminals (right column) ============ */
-.term-pane { display:flex; flex-direction:column; min-height:0; background:var(--bg-1); }
+/* min-width:0 is load-bearing: the pane is a row-flex item, so min-width:auto
+   would be the xterm's own rendered width. The pane could then grow with the
+   column but never shrink, and the terminal would keep the wider cols. */
+.term-pane { display:flex; flex-direction:column; min-width:0; min-height:0; background:var(--bg-1); }
 /* 30px panel header, same label as every other column. A live pane marks itself
    with an amber dot; nothing pulses. */
 .term-head { height:30px; flex:0 0 30px; display:flex; align-items:center; gap:8px; padding:0 12px; background:var(--bg-2); border-bottom:1px solid var(--border);

src/renderer/src/terminals.tsx

@@ -81,6 +81,15 @@ export function Terminal({ kind }: { kind: 'agent' | 'shell' }): React.ReactElem
         if (sel) bridge.clipboard.writeText(sel)
       })
     }
+    // ⌘A marks the whole buffer. xterm types on a hidden textarea, so the
+    // browser default would select that instead of the terminal's own text.
+    term.attachCustomKeyEventHandler((e) => {
+      if (e.type !== 'keydown' || !e.metaKey || e.ctrlKey || e.altKey) return true
+      if (e.key.toLowerCase() !== 'a') return true
+      e.preventDefault()
+      term.selectAll()
+      return false
+    })
     try { fit.fit() } catch { /* host not measured yet */ }
 
     let disposed = false
@@ -119,6 +128,11 @@ export function Terminal({ kind }: { kind: 'agent' | 'shell' }): React.ReactElem
           bridge.pty.write(id, d)
         })
         term.onResize(({ cols, rows }) => bridge.pty.resize(id, cols, rows))
+        // create() carried the size measured before this promise resolved. A fit
+        // in between changed xterm only, and onResize fires on a change, never on
+        // the current value, so the PTY would keep the stale width and the agent
+        // would wrap at more columns than the pane shows.
+        bridge.pty.resize(id, term.cols, term.rows)
         if (kind === 'agent') window.addEventListener('agentPaste', onPaste)
       })
     } else {

src/renderer/src/types.ts

@@ -98,7 +98,7 @@ export interface TerminalTheme {
 /** Effective project settings (mirrors src/main/config.ts). */
 export interface HelderConfig {
   ai: { command: string; autoLaunch: boolean }
-  editor: { autoSave: boolean; tabSize: number; wordWrap: WordWrap }
+  editor: { autoSave: boolean; tabSize: number; wordWrap: WordWrap; copyOnSelect: boolean }
   git: { confirmDiscard: boolean; confirmStage: boolean; confirmUnstage: boolean; defaultDiffMode: DiffMode; refreshInterval: number }
   files: { exclude: string[]; followGitignore: boolean }
   terminal: {
@@ -125,7 +125,7 @@ export interface HelderConfig {
 
 export const DEFAULT_CONFIG: HelderConfig = {
   ai: { command: 'claude', autoLaunch: true },
-  editor: { autoSave: false, tabSize: 4, wordWrap: 'markdown' },
+  editor: { autoSave: false, tabSize: 4, wordWrap: 'markdown', copyOnSelect: true },
   git: { confirmDiscard: true, confirmStage: false, confirmUnstage: false, defaultDiffMode: 'diff', refreshInterval: 10000 },
   files: { exclude: [], followGitignore: true },
   terminal: {

test/group-by-dir.test.ts

@@ -0,0 +1,35 @@
+import { describe, expect, it } from 'vitest'
+import { groupByDir } from '../src/renderer/src/components'
+import type { Change } from '../src/renderer/src/types'
+
+function change(path: string): Change {
+  return { path, status: 'M', add: 1, del: 0, deleted: false, staged: false, id: path }
+}
+
+describe('groupByDir', () => {
+  it('gives one group per folder when git returns the folder in separated runs', () => {
+    const groups = groupByDir([
+      change('tests/Feature/AlphaTest.php'),
+      change('app/Models/User.php'),
+      change('tests/Feature/BetaTest.php'),
+    ])
+    expect(groups.map((g) => g.dir)).toEqual(['tests/Feature', 'app/Models'])
+    expect(groups[0].rows.map((r) => r.path)).toEqual([
+      'tests/Feature/AlphaTest.php',
+      'tests/Feature/BetaTest.php',
+    ])
+  })
+
+  it('keeps every row, so the keyboard cursor walks the full list', () => {
+    const list = ['a/one.ts', 'b/two.ts', 'a/three.ts', 'four.ts'].map(change)
+    const flat = groupByDir(list).flatMap((g) => g.rows)
+    expect(flat).toHaveLength(list.length)
+    expect(new Set(flat.map((r) => r.id)).size).toBe(list.length)
+  })
+
+  it('puts a project-root file in the empty-string group', () => {
+    expect(groupByDir([change('README.md')])).toEqual([
+      { dir: '', rows: [change('README.md')] },
+    ])
+  })
+})