feat: productivity suite — task loop, workflow, theming, docs & more (#197)

## Summary

A large productivity-focused feature branch delivering a suite of improvements across automation, project management, theming, performance, and documentation.

### Features

- **Guided Project Workflow** (#189) — Four-phase workflow panel (Discuss → Plan → Execute → Verify) to keep projects structured from idea to completion
- **Automated Task Loop** (#179) — Per-task conversation orchestration with wave-based parallel execution, blocked-task detection, and concurrency control
- **Wave-Based Parallel Execution** (#191) — Tasks run in dependency-aware waves with configurable concurrency; independent tasks execute in parallel
- **Auto-Commit After Task Completion** (#192) — Task Loop optionally commits after each completed task so progress is never lost
- **PRD Creator** (#180) — AI-assisted PRD and task list panel that outputs `hikari-tasks.json` for the Task Loop to consume
- **Project Context Panel** (#188) — Persistent `PROJECT.md`, `REQUIREMENTS.md`, `ROADMAP.md`, and `STATE.md` files injected into Claude's context automatically
- **Codebase Mapper** (#190) — Generates a `CODEBASE.md` architectural summary so Claude always understands the project structure
- **Community Preset Themes** (#181) — Six built-in community themes: Dracula, Catppuccin Mocha, Nord, Solarized Dark, Gruvbox Dark, and Rosé Pine
- **In-App Changelog Panel** (#193) — Fetches release notes from GitHub at runtime and displays them inside the app
- **Full Embedded Documentation** (#196) — Replaced the single-page help modal with a 12-page paginated docs browser featuring a sidebar TOC, prev/next navigation, keyboard navigation (arrow keys, `?` shortcut), and comprehensive coverage of every feature

### Performance & Fixes

- **Lazy Loading & Virtualisation** (#194) — Virtual windowing for conversation history, markdown memoisation, and debounced search for smooth rendering of large sessions
- **Ctrl+C Copy Fix** (#195) — `Ctrl+C` now copies selected text as expected; interrupt-Claude behaviour only fires when no text is selected

### UX

- Back-to-workflow button in PRD Creator and Task Loop panels for easy navigation
- Navigation icon cluster replaced with a single clean dropdown menu

## Closes

Closes #179
Closes #180
Closes #181
Closes #188
Closes #189
Closes #190
Closes #191
Closes #192
Closes #193
Closes #194
Closes #195
Closes #196

---

✨ This PR was created with help from Hikari~ 🌸

Reviewed-on: #197
Co-authored-by: Hikari <hikari@nhcarrigan.com>
Co-committed-by: Hikari <hikari@nhcarrigan.com>

src/lib/stores/config.ts

@@ -2,7 +2,19 @@ import { writable, derived } from "svelte/store";
 import { invoke } from "@tauri-apps/api/core";
 import { readFile } from "@tauri-apps/plugin-fs";
 
-export type Theme = "dark" | "light" | "high-contrast" | "custom";
+export type Theme =
+  | "dark"
+  | "light"
+  | "high-contrast"
+  | "custom"
+  | "dracula"
+  | "catppuccin"
+  | "nord"
+  | "solarized"
+  | "solarized-light"
+  | "catppuccin-latte"
+  | "gruvbox-light"
+  | "rose-pine-dawn";
 export type BudgetAction = "warn" | "block";
 
 export interface CustomThemeColors {
@@ -65,6 +77,10 @@ export interface HikariConfig {
   // Custom UI font settings
   custom_ui_font_path: string | null;
   custom_ui_font_family: string | null;
+  // Task Loop auto-commit settings
+  task_loop_auto_commit: boolean;
+  task_loop_commit_prefix: string;
+  task_loop_include_summary: boolean;
 }
 
 const defaultConfig: HikariConfig = {
@@ -115,6 +131,9 @@ const defaultConfig: HikariConfig = {
   custom_font_family: null,
   custom_ui_font_path: null,
   custom_ui_font_family: null,
+  task_loop_auto_commit: false,
+  task_loop_commit_prefix: "feat",
+  task_loop_include_summary: false,
 };
 
 function createConfigStore() {