refactor(agent-presets,web): copy-only preset authoring with a path to the files

The web YAML editor is gone. agentPreset.write (arbitrary composition
text) became agentPreset.copy { from, agentPreset, name? }: a host-side
whole-directory copy of ids the host resolves itself — symlinks
dereferenced, modes re-tightened to owner-only with owner-execute kept,
metadata rewritten to keep the source's description but never its name or
roster order. No composition text or path crosses the wire in either
authoring direction, and the entryListSchema/!!js concern dissolves with
assertComposition itself.

The settings section becomes: a read-only viewer over shipped
compositions, a copy dialog (id + optional display name) as the only
create entry, delete for custom rows, and a location action leading into
the preset's own files — agentPreset.openDocument { agentPreset } resolves
the directory host-side and opens it natively, or answers
{ opened: false, path } for the row to show as text where the deployment
has no desktop. agentPreset.list reports hasDocument beside authorable;
the gateway's nativeOpen config pins the capability where
canOpenNativePath platform detection would mislead. The privileged set is
now read/copy/openDocument/remove.

With files as the only composition editor, standing mounts grew
stamp-keyed generations: ensureStanding compares the composition file's
mtime+size and starts the next generation for later sessions, while every
joined session keeps the generation it runs on.

New keyless web lane (agent-preset-authoring, overlay pins
nativeOpen: false so goldens render one branch on every platform) drives
view/copy/reveal/delete end to end; the real-composition CLI e2e switches
to copy semantics.

.agents/notes/implemented/architecture/2026-08-08-per-preset-standing-mounts.i18n.yaml

@@ -2,5 +2,5 @@
 # side as of the last confirmed-consistent state. Both languages carry equal authority;
 # after editing either side, bring the other along and re-record with:
 #   pnpm run verify-translation-pairing --write .agents/notes/implemented/architecture/2026-08-08-per-preset-standing-mounts.md
-2026-08-08-per-preset-standing-mounts.md: 19a53926e9f07b01115cfbb4ddc89eb7ee0c59a0
-2026-08-08-per-preset-standing-mounts.zh.md: 856fbb742a843935902f9aa7578ba6821a9a13c3
+2026-08-08-per-preset-standing-mounts.md: 61aa737a4b7d6f15f160d3673a14cdc0c5df4a76
+2026-08-08-per-preset-standing-mounts.zh.md: 17de2cf3ec9ee9564cb5fde1fabb5014c389be39

.agents/notes/implemented/architecture/2026-08-08-per-preset-standing-mounts.md

@@ -23,7 +23,7 @@ Standing mounts fix the class, not the instances: the registrations a reader nee
 ## Load-bearing details
 
 - **Standing mounts hang off the service's untraced `selfCtx`.** A method invoked through the traceable proxy sees `this.ctx` rebound to the caller with a shadow; reflect resolution for every fiber in a subtree minted from it starts at the shadow's fiber, so entries fail on services their own `inject` declares (`cannot get property "tools" without inject` while the entry's store holds it). The `tasks-local` selfCtx precedent, now with a second consumer.
-- **A settled mount is permanent for the process.** The composition a running session joined must survive its file changing or disappearing; deletion and edits reach only future generations (the authoring layer swaps the map pointer, never disposes a joined generation), and superseded generations are reclaimed only by whole-tree teardown — deliberate, bounded by edit frequency, recorded in the package's Known Limitations.
+- **A settled mount serves until its composition file's stamp changes.** The composition a running session joined must survive its file changing or disappearing; each generation records the file's stamp (mtime + size) and a session that finds it stale starts the next generation, so file edits — the only composition editor once authoring became copy-only — reach later sessions without any authoring call dropping the pointer. Joined sessions keep their generation, and superseded generations are reclaimed only by whole-tree teardown — deliberate, bounded by edit frequency, recorded in the package's Known Limitations.
 - **`peek()` stays chain-blind.** Restrictions and guards address one scope's own contributions; only registration VIEWS inherit. Restrictions along the chain intersect (any scope may mask a global-surface name for everything nested inside it).
 - **Re-linking a key (`setScopeParent` on a live agent) is the blank-session recompose path** — valid only while nothing produced under the old parent is retained, which the caller must uphold; the relation cannot see session logs.
 

.agents/notes/implemented/architecture/2026-08-08-per-preset-standing-mounts.zh.md

@@ -23,7 +23,7 @@ Status: implemented
 ## Load-bearing details
 
 - **常驻挂载挂在服务未追踪的 `selfCtx` 上。** 经 traceable 代理调用的方法看到的 `this.ctx` 被重绑到调用方并携带 shadow；从它派生的子树里每个 fiber 的 reflect 解析都从 shadow 的 fiber 起步，entry 会在自己 `inject` 声明的服务上失败（`cannot get property "tools" without inject`，而它的 store 里明明有）。`tasks-local` 的 selfCtx 先例，如今有了第二个消费者。
-- **挂载一旦成功即进程级永久。** 运行中会话加入的组装必须在其文件被修改或删除后继续存活；删除与编辑只影响未来的代际（创作层替换 map 指针，绝不 dispose 已被加入的代际），被替代的代际只由整树卸载回收——刻意为之，上限取决于编辑频率，已记入包的 Known Limitations。
+- **挂载一旦成功即持续供职，直到组装文件的 stamp 变化。** 运行中会话加入的组装必须在其文件被修改或删除后继续存活；每个代际记录文件 stamp（mtime + 大小），发现过期的会话开启下一个代际，因此文件编辑——创作改为仅复制之后唯一的组装编辑器——无需任何创作调用丢弃指针即可达到后续会话。已加入的会话保持其代际，被替代的代际只由整树卸载回收——刻意为之，上限取决于编辑频率，已记入包的 Known Limitations。
 - **`peek()` 保持不看链。** 限制与守卫定位的是单个作用域**自己**的贡献；只有注册**视图**沿链继承。链上的限制求交（链上任一作用域都可为嵌套其内的一切遮蔽某个全局面名字）。
 - **对活 agent 重新认父（`setScopeParent`）是空白会话 recompose 的路径**——仅当旧父之下的产出一概不被保留时才合法，由调用方保证；该关系看不见会话日志。