Bump version to 0.3.0

## What's New in v0.3.0

### Claude Code Settings (TUI Mode, Effort, Focus, Caching)
- New per-project and global settings for Claude Code CLI behavior
- **TUI Fullscreen Mode**: Flicker-free alt-screen rendering via CLAUDE_CODE_NO_FLICKER
- **Effort Level**: Control reasoning depth (low/medium/high)
- **Focus Mode**: Collapse tool output to one-line summaries
- **Thinking Summaries**: Show Claude's thinking process
- **Session Recap**: Get context when returning to a session
- **Auto-Scroll Disabled**: Disable auto-scroll in fullscreen TUI
- **Env Scrub**: Strip credentials from subprocess environments
- **Prompt Caching (1h)**: Enable 1-hour prompt cache TTL
- New ClaudeCodeSettingsModal accessible from project config and global settings
- Settings injected as env vars and ~/.claude/settings.json via entrypoint

### Session Naming
- Name Claude Code terminal sessions with the -n flag
- Session names displayed in terminal tabs instead of project name

### Global Default Fallbacks
- Global SSH key path now used when per-project SSH path is not set
- Global git name/email now used when per-project values are not set
- New UI in Settings panel for SSH key directory, git name, and git email

### Relaxed Environment Variable Filter
- CLAUDE_CODE_* env vars now allowed in custom env vars for power users
- Only specific internal vars (CLAUDE_INSTRUCTIONS, MCP_SERVERS_JSON, etc.) blocked

### Documentation
- Updated README, HOW-TO-USE, and CLAUDE.md with all new features
- New "Claude Code Tips" section documenting built-in CLI features
  (/focus, /recap, /color, /loop, /powerup, /team-onboarding, setup wizards)

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

VERSION

@@ -1 +1 @@
-0.2
+0.3

app/package.json

@@ -1,7 +1,7 @@
 {
   "name": "triple-c",
   "private": true,
-  "version": "0.2.0",
+  "version": "0.3.0",
   "type": "module",
   "scripts": {
     "dev": "vite",

app/src-tauri/Cargo.toml

@@ -1,6 +1,6 @@
 [package]
 name = "triple-c"
-version = "0.2.0"
+version = "0.3.0"
 edition = "2021"
 
 [lib]

app/src-tauri/tauri.conf.json

@@ -1,7 +1,7 @@
 {
   "$schema": "https://raw.githubusercontent.com/tauri-apps/tauri/dev/crates/tauri-cli/schema.json",
   "productName": "Triple-C",
-  "version": "0.2.0",
+  "version": "0.3.0",
   "identifier": "com.triple-c.desktop",
   "build": {
     "beforeDevCommand": "npm run dev",