Stacks: one machine, one set of files; default home is <data dir>/stacks

The hub no longer probes a node's Docker on tcp :2375, holds compose files
for a node, or runs compose against another machine's Docker. hubStacks,
nodeDocker, taskOnHub and the hub-side /api/nodes/{node}/docker/... routes
are gone; the generic node proxy hands those requests to the node's own
Ham Lab. Stack.remote / held_by and compose.Spec.Remote are removed.

New stacks default to <data dir>/stacks on every machine. Folders with two
or more deployed stacks are still offered, after it, never as default.
The ~/stacks fallback is gone. A missing home is skipped without a sudo find.

A schedule saved earlier with a tcp target is refused with a message
instead of being run against this machine's Docker.

PORTABILITY.md 3.1, 3.2, 3.3 and 9.2 done; 3.5 checked, no change needed.

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>

web/src/Docker.tsx

@@ -355,7 +355,7 @@ function StackDetail({ name, startTask, onBack, onChanged, onDuplicate }: { name
     <div className="svc-detail">
       <CloseBtn onClick={onBack} />
       <div className="svc-head"><button className="btn back" onClick={onBack}>‹ Back</button><span className={'sdot ' + (st.containers.length === 0 ? '' : st.running === st.containers.length ? 'ok' : st.running ? 'warn' : 'bad')} /><span className="dname">{st.name}</span><span className="muted small">{st.running}/{st.containers.length} running</span></div>
-      <div className="muted small mono" style={{ overflowWrap: 'anywhere' }}>{file === 'env' ? (st.host_file.replace(/[^/]+$/, '') + '.env') : (st.host_files?.[file] ?? st.host_file)}{st.held_by && <span className="muted"> · kept on <b>{st.held_by}</b>, deployed to this machine over {st.remote}</span>}{st.via && <span className="muted"> · compose runs inside <b>{st.via}</b>, as it was deployed</span>}{st.has_env && ' · has a .env beside it'}</div>
+      <div className="muted small mono" style={{ overflowWrap: 'anywhere' }}>{file === 'env' ? (st.host_file.replace(/[^/]+$/, '') + '.env') : (st.host_files?.[file] ?? st.host_file)}{st.via && <span className="muted"> · compose runs inside <b>{st.via}</b>, as it was deployed</span>}{st.has_env && ' · has a .env beside it'}</div>
       {((st.host_files?.length ?? 0) > 1 || st.has_env) && <div className="chips" title="this stack is deployed from several files, in this order; Deploy uses all of them">{st.host_files!.map((f, i) => <button key={f} className={'chip' + (i === file ? ' on' : '')} onClick={async () => { if (dirty && !(await askYes('Discard unsaved changes to this file?', 'Discard'))) return; setFile(i) }}>{f.split('/').pop()}</button>)}{st.has_env && <button className={'chip' + (file === 'env' ? ' on' : '')} title="the .env beside the compose file: variables compose substitutes" onClick={async () => { if (dirty && !(await askYes('Discard unsaved changes to this file?', 'Discard'))) return; setFile('env') }}>.env</button>}</div>}
       {file === 'env' && !reveal ? <div className="env-masked"><pre className="editor stack-editor">{maskEnv(text)}</pre><button className="btn" onClick={() => setReveal(true)}>Reveal and edit</button></div> :
       <CodeEditor className="stack-editor" language={file === 'env' ? 'env' : 'yaml'} value={text} onChange={setText} />}
@@ -447,7 +447,7 @@ export default function Docker() {
           {shownTab === 'stacks' && (stacks ?? []).map((st) => (
             <div key={st.name} className={'svc-row' + (st.name === selStack ? ' active' : '')} onClick={() => st.editable ? setSel('stack:' + st.name) : toast(st.note ?? 'not editable here', 'info')}>
               <span className={'sdot ' + (st.containers.length === 0 ? '' : st.running === st.containers.length ? 'ok' : st.running ? 'warn' : 'bad')} />
-              <div className="svc-name"><div className="n">{st.name}</div><div className="d">{st.editable ? (st.held_by ? `on ${st.held_by}: ` : '') + st.host_file : st.note}</div></div>
+              <div className="svc-name"><div className="n">{st.name}</div><div className="d">{st.editable ? st.host_file : st.note}</div></div>
               <div className="svc-state">{st.containers.length === 0 ? 'not deployed' : `${st.running}/${st.containers.length}`}{!st.editable && <><br />read-only</>}</div>
             </div>
           ))}

web/src/StackNew.tsx

@@ -101,7 +101,7 @@ export default function StackNew({ mode, from, networks = [], taken, onClose, on
           {homes.length > 1 && <label className="muted">Where
             <select value={home} onChange={(e) => setHome(e.target.value)}>{homes.map((h) => <option key={h.dir + h.via} value={h.dir}>{sameTail(h) ? h.dir : tail(h.dir)} · {h.stacks} stack{h.stacks === 1 ? '' : 's'}</option>)}</select>
           </label>}
-          {picked && <div className="muted small mono" style={{ overflowWrap: 'anywhere' }}>{picked.dir}/{name || '…'}/compose.yaml{picked.held_by && ` — kept on ${picked.held_by}, deployed here over ${picked.remote}`}{picked.via && ` — compose runs inside ${picked.via}, like its neighbours`}</div>}
+          {picked && <div className="muted small mono" style={{ overflowWrap: 'anywhere' }}>{picked.dir}/{name || '…'}/compose.yaml{picked.via && ` — compose runs inside ${picked.via}, like its neighbours`}</div>}
           {!from && <div className="tabs"><button className={how === 'form' ? 'on' : ''} onClick={() => setHow('form')}>Form</button><button className={how === 'compose' ? 'on' : ''} onClick={toCompose}>Compose</button></div>}
           {how === 'form' ? <>
             <label className="muted">Image<input className="mono" value={form.image} onChange={set('image')} placeholder="traefik/whoami:latest" spellCheck={false} autoCapitalize="off" autoCorrect="off" /></label>

web/src/api.ts

@@ -154,8 +154,8 @@ export interface Hardware { at: string; system: HWSystem; board: HWBoard; cpu: H
 
 export interface DockerLogLine { t: string; m: string; err?: boolean }
 export interface DockerInfo { available: boolean; message?: string; tool?: string; containers: DockerContainer[]; images: Record<string, unknown>[]; volumes: Record<string, unknown>[]; networks: Record<string, unknown>[] }
-export interface Stack { name: string; containers: string[]; running: number; file: string; host_file: string; files: string[]; host_files: string[] | null; images: string[] | null; via: string; remote: string; held_by: string; editable: boolean; note?: string; has_env: boolean }
-export interface StackHome { dir: string; inner: string; via: string; remote: string; held_by: string; stacks: number; default: boolean }
+export interface Stack { name: string; containers: string[]; running: number; file: string; host_file: string; files: string[]; host_files: string[] | null; images: string[] | null; via: string; editable: boolean; note?: string; has_env: boolean }
+export interface StackHome { dir: string; inner: string; via: string; stacks: number; default: boolean }
 export interface ImageCheck { image: string; state: 'current' | 'update' | 'unknown'; detail?: string }
 export interface StackDiff { name: string; base: '' | 'deployed' | 'saved'; old: string; new: string }
 export interface AlertRule { id: string; name: string; sensor: string; op: string; value: number | boolean | string; for_sec: number; severity: 'info' | 'warn' | 'crit'; enabled: boolean; machines: string }