docs: fix changelog sync between README and PRD

- Add missing FR-031 (exclude files) and FR-033 (clipboard) to README
  v0.4.0 changelog
- Fix template variables in README: {{type}}/{{scope}}/{{subject}}/
  {{body}} → {{diff}}/{{symbols}}/{{files}}/{{type}}/{{scope}}
- Add FR-031/FR-033 mention to PRD v4.0 revision history entry

Author: Sephyi

PRD.md

@@ -18,7 +18,7 @@ SPDX-License-Identifier: PolyForm-Noncommercial-1.0.0
 
 | Version | Date       | Summary |
 |---------|------------|---------|
-| 4.0     | 2026-03-13 | PRD normalization: aligned phases with shipped versions (v0.2.0/v0.3.x/v0.4.0), collapsed revision history, unified status markers, resolved stale critical issues, canonicalized test count to 308, removed dead cross-references. |
+| 4.0     | 2026-03-13 | PRD normalization: aligned phases with shipped versions (v0.2.0/v0.3.x/v0.4.0), collapsed revision history, unified status markers, resolved stale critical issues, canonicalized test count to 308, removed dead cross-references. FR-031 (Exclude Files) and FR-033 (Copy to Clipboard) shipped. |
 | 3.3     | 2026-03-13 | v0.4.0 full feature completion — FR-030 (Custom Prompt Templates), FR-032 (Multi-Language), FR-036 (Tree-sitter Query Patterns), FR-057 (Additional Languages), FR-058 (History Learning), TR-006 (Eval Harness), TR-007 (Fuzzing). 308 tests. |
 | 3.2     | 2026-03-13 | FR-035 (Rename Detection), FR-037 (Expanded Secret Scanning), FR-038 (Progress Indicators). 202 tests. |
 | 3.1     | 2026-03-13 | Deep codebase audit + streaming hardening: `Provider::new()` returns `Result`, 1 MB response cap, EOF buffer parsing, zero-allocation streaming, HTTP error body propagation. 188 tests. |

README.md

@@ -229,14 +229,16 @@ See [Testing Strategy](DOCS.md#testing-strategy) for the full breakdown.
 ### 🔎 `v0.4.0` — See Everything (current)
 
 - **10-language tree-sitter support** — Added Java, C, C++, Ruby, and C# to the existing Rust, TypeScript, JavaScript, Python, and Go. All languages are individually feature-gated and enabled by default. Disable any with `--no-default-features` + selective `--features lang-rust,lang-go,...`.
-- **Custom prompt templates** — User-defined templates with `{{type}}`, `{{scope}}`, `{{subject}}`, `{{body}}` variables via `template_path` config.
+- **Custom prompt templates** — User-defined templates with `{{diff}}`, `{{symbols}}`, `{{files}}`, `{{type}}`, `{{scope}}` variables via `template_path` config.
 - **Multi-language commit messages** — Generate messages in any language with `--locale` flag or `locale` config (e.g., `--locale de` for German).
 - **Commit history style learning** — Learns from recent commit history to match your project's style (`learn_from_history`, `history_sample_size` config).
 - **Rename detection** — Detects file renames with similarity percentage via `git diff --find-renames`, displayed as `old → new (N% similar)` in prompts and split suggestions. Configurable threshold (default 70%, set to 0 to disable).
 - **Expanded secret scanning** — 25 built-in patterns across 13 categories (cloud providers, AI/ML, source control, communication, payment, database, cryptographic, generic). Pluggable engine: add custom regex patterns or disable built-ins by name via config.
 - **Progress indicators** — Contextual `indicatif` spinners during pipeline phases (analyzing, scanning, generating). Auto-suppressed in non-TTY environments (git hooks, pipes).
 - **Evaluation harness** — `cargo test --features eval` for structured LLM output quality benchmarking.
 - **Fuzz testing** — `cargo-fuzz` targets for sanitizer and diff parser robustness.
+- **Exclude files** — `--exclude <GLOB>` flag (repeatable) and `exclude_patterns` config option. Glob patterns filter files from analysis (e.g., `*.lock`, `**/*.generated.*`, `vendor/**`). CLI patterns additive with config.
+- **Copy to clipboard** — `--clipboard` flag copies the generated message to the system clipboard and prints to stdout, skipping commit confirmation.
 
 ### 🔬 `v0.3.1` — Trust, but Verify