Edit workspace files directly on web (#2270)

* feat(files): edit workspace files on web

Keep source buffers synchronized with host file changes and require an explicit overwrite or reload when revisions diverge.

* feat(panels): surface and protect modified tabs

Expose tooltip and modification state through the generic panel boundary so tabs can show stable metadata and guard every close route consistently.

* fix(tests): use portable fake timeout handle

* fix(files): harden editor conflict handling

Preserve modified panel state across tab eviction, use precise revisions for optimistic writes, coalesce concurrent file watchers, and localize the editor interface.

* fix(files): close editor concurrency gaps

Coalesce clean reloads, preserve subscriber identities and file permissions, suspend pending saves during close confirmation, and carry precise revisions through file reads.

* test(files): expect read revision metadata

packages/app/src/panels/draft-panel-descriptor.ts

@@ -14,6 +14,7 @@ export function buildDraftPanelDescriptor(input: {
     return {
       label: creatingLabel,
       subtitle: i18n.t("panels.draft.creatingAgent"),
+      tooltip: creatingLabel,
       titleState: "ready",
       icon,
       statusBucket: "running",
@@ -23,6 +24,7 @@ export function buildDraftPanelDescriptor(input: {
   return {
     label: newAgentLabel,
     subtitle: newAgentLabel,
+    tooltip: newAgentLabel,
     titleState: "ready",
     icon,
     statusBucket: null,