Add yaak-actions crate for centralized action system

Implements a unified action system that serves as a single source of truth
for all operations in Yaak (Tauri app, CLI, plugins, deep links, MCP server).

Key features:
- ActionExecutor: Combined registry and execution engine with async RwLock
- ActionHandler: Trait-based handlers using async closures
- Context system: RequiredContext and CurrentContext for action availability
- Action groups: Organize related actions
- TypeScript bindings: Auto-generated via ts-rs for frontend use

Design highlights:
- Handlers are closures (no dependencies on other yaak crates)
- Registration requires both metadata and handler (prevents orphan actions)
- Flexible return values via serde_json::Value
- All methods are async using tokio

All 33 tests passing. Ready for integration with yaak-core and yaak-app.

Co-Authored-By: Claude Sonnet 4.5 <noreply@anthropic.com>

crates/yaak-actions/bindings/ActionAvailability.ts

@@ -0,0 +1,14 @@
+// This file was generated by [ts-rs](https://github.com/Aleph-Alpha/ts-rs). Do not edit this file manually.
+
+/**
+ * Availability status for an action.
+ */
+export type ActionAvailability = { "status": "available" } | { "status": "available-with-prompt", 
+/**
+ * Fields that will require prompting.
+ */
+prompt_fields: Array<string>, } | { "status": "unavailable", 
+/**
+ * Fields that are missing.
+ */
+missing_fields: Array<string>, } | { "status": "not-found" };

crates/yaak-actions/bindings/ActionError.ts

@@ -0,0 +1,13 @@
+// This file was generated by [ts-rs](https://github.com/Aleph-Alpha/ts-rs). Do not edit this file manually.
+import type { ActionGroupId } from "./ActionGroupId";
+import type { ActionId } from "./ActionId";
+import type { ActionScope } from "./ActionScope";
+
+/**
+ * Errors that can occur during action operations.
+ */
+export type ActionError = { "type": "not-found" } & ActionId | { "type": "disabled", action_id: ActionId, reason: string, } | { "type": "invalid-scope", expected: ActionScope, actual: ActionScope, } | { "type": "timeout" } & ActionId | { "type": "plugin-error" } & string | { "type": "validation-error" } & string | { "type": "permission-denied" } & string | { "type": "cancelled" } | { "type": "internal" } & string | { "type": "context-missing", 
+/**
+ * The context fields that are missing.
+ */
+missing_fields: Array<string>, } | { "type": "group-not-found" } & ActionGroupId | { "type": "group-already-exists" } & ActionGroupId;

crates/yaak-actions/bindings/ActionGroupId.ts

@@ -0,0 +1,10 @@
+// This file was generated by [ts-rs](https://github.com/Aleph-Alpha/ts-rs). Do not edit this file manually.
+
+/**
+ * Unique identifier for an action group.
+ *
+ * Format: `namespace:group-name`
+ * - Built-in: `yaak:export`
+ * - Plugin: `plugin.my-plugin:utilities`
+ */
+export type ActionGroupId = string;

crates/yaak-actions/bindings/ActionGroupMetadata.ts

@@ -0,0 +1,32 @@
+// This file was generated by [ts-rs](https://github.com/Aleph-Alpha/ts-rs). Do not edit this file manually.
+import type { ActionGroupId } from "./ActionGroupId";
+import type { ActionScope } from "./ActionScope";
+
+/**
+ * Metadata about an action group.
+ */
+export type ActionGroupMetadata = { 
+/**
+ * Unique identifier for this group.
+ */
+id: ActionGroupId, 
+/**
+ * Display name for the group.
+ */
+name: string, 
+/**
+ * Optional description of the group's purpose.
+ */
+description: string | null, 
+/**
+ * Icon to display for the group.
+ */
+icon: string | null, 
+/**
+ * Sort order for displaying groups (lower = earlier).
+ */
+order: number, 
+/**
+ * Optional scope restriction (if set, group only appears in this scope).
+ */
+scope: ActionScope | null, };

crates/yaak-actions/bindings/ActionGroupSource.ts

@@ -0,0 +1,18 @@
+// This file was generated by [ts-rs](https://github.com/Aleph-Alpha/ts-rs). Do not edit this file manually.
+
+/**
+ * Where an action group was registered from.
+ */
+export type ActionGroupSource = { "type": "builtin" } | { "type": "plugin", 
+/**
+ * Plugin reference ID.
+ */
+ref_id: string, 
+/**
+ * Plugin name.
+ */
+name: string, } | { "type": "dynamic", 
+/**
+ * Source identifier.
+ */
+source_id: string, };

crates/yaak-actions/bindings/ActionGroupWithActions.ts

@@ -0,0 +1,16 @@
+// This file was generated by [ts-rs](https://github.com/Aleph-Alpha/ts-rs). Do not edit this file manually.
+import type { ActionGroupMetadata } from "./ActionGroupMetadata";
+import type { ActionMetadata } from "./ActionMetadata";
+
+/**
+ * A group with its actions for UI rendering.
+ */
+export type ActionGroupWithActions = { 
+/**
+ * Group metadata.
+ */
+group: ActionGroupMetadata, 
+/**
+ * Actions in this group.
+ */
+actions: Array<ActionMetadata>, };

crates/yaak-actions/bindings/ActionId.ts

@@ -0,0 +1,10 @@
+// This file was generated by [ts-rs](https://github.com/Aleph-Alpha/ts-rs). Do not edit this file manually.
+
+/**
+ * Unique identifier for an action.
+ *
+ * Format: `namespace:category:name`
+ * - Built-in: `yaak:http-request:send`
+ * - Plugin: `plugin.copy-curl:http-request:copy`
+ */
+export type ActionId = string;

crates/yaak-actions/bindings/ActionMetadata.ts

@@ -0,0 +1,54 @@
+// This file was generated by [ts-rs](https://github.com/Aleph-Alpha/ts-rs). Do not edit this file manually.
+import type { ActionGroupId } from "./ActionGroupId";
+import type { ActionId } from "./ActionId";
+import type { ActionScope } from "./ActionScope";
+import type { RequiredContext } from "./RequiredContext";
+
+/**
+ * Metadata about an action for discovery.
+ */
+export type ActionMetadata = { 
+/**
+ * Unique identifier for this action.
+ */
+id: ActionId, 
+/**
+ * Display label for the action.
+ */
+label: string, 
+/**
+ * Optional description of what the action does.
+ */
+description: string | null, 
+/**
+ * Icon name to display.
+ */
+icon: string | null, 
+/**
+ * The scope this action applies to.
+ */
+scope: ActionScope, 
+/**
+ * Keyboard shortcut (e.g., "Cmd+Enter").
+ */
+keyboardShortcut: string | null, 
+/**
+ * Whether the action requires a selection/target.
+ */
+requiresSelection: boolean, 
+/**
+ * Optional condition expression for when action is enabled.
+ */
+enabledCondition: string | null, 
+/**
+ * Optional group this action belongs to.
+ */
+groupId: ActionGroupId | null, 
+/**
+ * Sort order within a group (lower = earlier).
+ */
+order: number, 
+/**
+ * Context requirements for this action.
+ */
+requiredContext: RequiredContext, };

crates/yaak-actions/bindings/ActionParams.ts

@@ -0,0 +1,10 @@
+// This file was generated by [ts-rs](https://github.com/Aleph-Alpha/ts-rs). Do not edit this file manually.
+
+/**
+ * Parameters passed to action handlers.
+ */
+export type ActionParams = { 
+/**
+ * Arbitrary JSON parameters.
+ */
+data: unknown, };

crates/yaak-actions/bindings/ActionResult.ts

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+// This file was generated by [ts-rs](https://github.com/Aleph-Alpha/ts-rs). Do not edit this file manually.
+import type { InputPrompt } from "./InputPrompt";
+
+/**
+ * Result of action execution.
+ */
+export type ActionResult = { "type": "success", 
+/**
+ * Optional data to return.
+ */
+data: unknown, 
+/**
+ * Optional message to display.
+ */
+message: string | null, } | { "type": "requires-input", 
+/**
+ * Prompt to show user.
+ */
+prompt: InputPrompt, 
+/**
+ * Continuation token.
+ */
+continuation_id: string, } | { "type": "cancelled" };

crates/yaak-actions/bindings/ActionScope.ts

@@ -0,0 +1,6 @@
+// This file was generated by [ts-rs](https://github.com/Aleph-Alpha/ts-rs). Do not edit this file manually.
+
+/**
+ * The scope in which an action can be invoked.
+ */
+export type ActionScope = "global" | "http-request" | "websocket-request" | "grpc-request" | "workspace" | "folder" | "environment" | "cookie-jar";

crates/yaak-actions/bindings/ActionSource.ts

@@ -0,0 +1,18 @@
+// This file was generated by [ts-rs](https://github.com/Aleph-Alpha/ts-rs). Do not edit this file manually.
+
+/**
+ * Where an action was registered from.
+ */
+export type ActionSource = { "type": "builtin" } | { "type": "plugin", 
+/**
+ * Plugin reference ID.
+ */
+ref_id: string, 
+/**
+ * Plugin name.
+ */
+name: string, } | { "type": "dynamic", 
+/**
+ * Source identifier.
+ */
+source_id: string, };

crates/yaak-actions/bindings/ActionTarget.ts

@@ -0,0 +1,6 @@
+// This file was generated by [ts-rs](https://github.com/Aleph-Alpha/ts-rs). Do not edit this file manually.
+
+/**
+ * The target entity for an action.
+ */
+export type ActionTarget = { "type": "none" } | { "type": "http-request", id: string, } | { "type": "websocket-request", id: string, } | { "type": "grpc-request", id: string, } | { "type": "workspace", id: string, } | { "type": "folder", id: string, } | { "type": "environment", id: string, } | { "type": "multiple", targets: Array<ActionTarget>, };

crates/yaak-actions/bindings/ContextRequirement.ts

@@ -0,0 +1,6 @@
+// This file was generated by [ts-rs](https://github.com/Aleph-Alpha/ts-rs). Do not edit this file manually.
+
+/**
+ * How strictly a context field is required.
+ */
+export type ContextRequirement = "not-required" | "optional" | "required" | "required-with-prompt";

crates/yaak-actions/bindings/CurrentContext.ts

@@ -0,0 +1,27 @@
+// This file was generated by [ts-rs](https://github.com/Aleph-Alpha/ts-rs). Do not edit this file manually.
+import type { ActionTarget } from "./ActionTarget";
+
+/**
+ * Current context state from the application.
+ */
+export type CurrentContext = { 
+/**
+ * Current workspace ID (if any).
+ */
+workspaceId: string | null, 
+/**
+ * Current environment ID (if any).
+ */
+environmentId: string | null, 
+/**
+ * Currently selected target (if any).
+ */
+target: ActionTarget | null, 
+/**
+ * Whether a window context is available.
+ */
+hasWindow: boolean, 
+/**
+ * Whether the context provider can prompt for missing fields.
+ */
+canPrompt: boolean, };

crates/yaak-actions/bindings/InputPrompt.ts

@@ -0,0 +1,7 @@
+// This file was generated by [ts-rs](https://github.com/Aleph-Alpha/ts-rs). Do not edit this file manually.
+import type { SelectOption } from "./SelectOption";
+
+/**
+ * A prompt for user input.
+ */
+export type InputPrompt = { "type": "text", label: string, placeholder: string | null, default_value: string | null, } | { "type": "select", label: string, options: Array<SelectOption>, } | { "type": "confirm", label: string, };

crates/yaak-actions/bindings/RequiredContext.ts

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+// This file was generated by [ts-rs](https://github.com/Aleph-Alpha/ts-rs). Do not edit this file manually.
+import type { ContextRequirement } from "./ContextRequirement";
+
+/**
+ * Specifies what context fields an action requires.
+ */
+export type RequiredContext = { 
+/**
+ * Action requires a workspace to be active.
+ */
+workspace: ContextRequirement, 
+/**
+ * Action requires an environment to be selected.
+ */
+environment: ContextRequirement, 
+/**
+ * Action requires a specific target entity (request, folder, etc.).
+ */
+target: ContextRequirement, 
+/**
+ * Action requires a window context (for UI operations).
+ */
+window: ContextRequirement, };

crates/yaak-actions/bindings/SelectOption.ts

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+// This file was generated by [ts-rs](https://github.com/Aleph-Alpha/ts-rs). Do not edit this file manually.
+
+/**
+ * An option in a select prompt.
+ */
+export type SelectOption = { label: string, value: string, };