feat(scheduler): background auto-publish task (PR F2)

src-tauri/Cargo.toml

@@ -23,6 +23,11 @@ tauri-plugin-opener = "2"
 tauri-plugin-log = { version = "2", features = ["colored"] }
 tauri-plugin-updater = "2"
 tauri-plugin-process = "2"
+# Desktop notifications fired by the background scheduler (PR F2) when an
+# auto-publish exhausts its retry budget. Already a transitive dep via
+# the Tauri plugin tree, declared explicitly so the scheduler module can
+# import `NotificationExt` directly.
+tauri-plugin-notification = "2"
 serde = { version = "1", features = ["derive"] }
 serde_json = "1"
 dirs = "5"
@@ -50,6 +55,11 @@ regex = "1"
 # macOS Keychain, Linux Secret Service (gnome-keyring / KWallet).
 # Replaces the previous plain-text api_keys.json. ADR-009 documents the choice.
 keyring = { version = "3", features = ["apple-native", "windows-native", "sync-secret-service"] }
+# Async trait dispatch for the scheduler's PublishDispatcher seam — lets
+# tick() be tested with a mock without standing up a real AppHandle.
+# Already a transitive dep via sqlx; declared explicitly to make the
+# scheduler's intent visible.
+async-trait = "0.1"
 
 [dev-dependencies]
 # HTTP mock server for testing publish_post / publish_linkedin_post without

src-tauri/capabilities/default.json

@@ -11,6 +11,7 @@
     "opener:allow-reveal-item-in-dir",
     "log:default",
     "updater:default",
-    "process:allow-restart"
+    "process:allow-restart",
+    "notification:default"
   ]
 }

src-tauri/src/lib.rs

@@ -5,6 +5,7 @@ mod db;
 mod log_redact;
 mod network_rules;
 mod openrouter_pricing;
+mod scheduler;
 mod sidecar;
 mod state;
 mod token_store;
@@ -167,6 +168,14 @@ pub fn run() {
                 }
             });
 
+            // Scheduler background task (v0.4.0 PR F2). Polls SQLite every
+            // 60s for due drafts and dispatches them through the existing
+            // publish commands with the retry/backoff policy enforced by
+            // `db::scheduler`. Detached — nothing waits on it, failures
+            // are logged and never propagated to the user-visible setup
+            // path (a scheduler crash must not block app startup).
+            scheduler::spawn(app.handle().clone());
+
             // Fire-and-forget OpenRouter pricing refresh on startup. Falls
             // back silently to the static `pricing_map` if the user is
             // offline; subsequent app opens will pick up live rates the
@@ -190,6 +199,7 @@ pub fn run() {
         .plugin(tauri_plugin_opener::init())
         .plugin(tauri_plugin_updater::Builder::new().build())
         .plugin(tauri_plugin_process::init())
+        .plugin(tauri_plugin_notification::init())
         .invoke_handler(tauri::generate_handler![
             // AI
             commands::ai::generate_content,