feat(acl): gate every app command per window via a Tauri AppManifest

build.rs now derives an AppManifest from generate_handler!, which makes
tauri 2.11 apply the ACL to app commands (it skips them entirely without
one). default.json grants the 110 main-window commands, file-viewer.json
the five viewer_* commands, and build.rs refuses to build on a missing,
misspelled, duplicated, misfiled or deny-* grant, or on a hand-written
permission file. Stale autogenerated permissions are pruned per build.

Closes the residual risk recorded by the terminal file viewer: a
compromised viewer window could invoke any app command.

Co-Authored-By: Claude Opus 5.5 (1M context) <noreply@anthropic.com>

app/src-tauri/src/file_viewer/mod.rs

@@ -73,6 +73,14 @@ mod tests {
         assert_eq!(
             permissions,
             vec![
+                // App commands (bare): the five viewer commands, and nothing else — build.rs
+                // refuses any other bare grant in this file.
+                "allow-viewer-choose-file",
+                "allow-viewer-get-state",
+                "allow-viewer-poll-file",
+                "allow-viewer-read-file",
+                "allow-viewer-write-file",
+                // Plugin/core grants, unchanged.
                 "core:event:allow-listen",
                 "core:event:allow-unlisten",
                 "core:webview:allow-internal-toggle-devtools",