Add Claude Code hooks, commands, and permissions

High priority:

- Auto-format on edit (.claude/hooks/format-elixir.sh): runs mix format
  synchronously after every Edit/Write on .ex, .exs, and .heex files.
  Ensures code is formatted before the next read or tool call.

- mix test permissions: added Bash(mix test) (bare) and Bash(mix test *)
  (with path/flags) to the allow list. Previously only Bash(mix test:*)
  was allowed, which didn't match common invocations.

- Slash commands: /precommit runs the full mix precommit pipeline and
  reports failures with fix suggestions. /oban-status queries Oban job
  state via Tidewave SQL, grouped by state and worker.

Medium priority:

- Chrome DevTools permissions: added 8 new tools (select_page,
  list_network_requests, get_network_request, list_console_messages,
  get_console_message, hover, press_key, wait_for) for debugging API
  traffic, JS hook errors, hover states, and keyboard navigation.

- Gettext extraction hook (.claude/hooks/gettext-extract.sh): runs
  mix gettext.extract --merge asynchronously after editing .heex files.
  Async because it's project-wide and doesn't need to block the next edit.

- Sobelow permission: added Bash(mix sobelow:*) to the allow list for
  independent security checks.

.claude/commands/oban-status.md

@@ -0,0 +1,12 @@
+Query the Oban job queue status using Tidewave's `execute_sql_query` tool against the `MusicLibrary.BackgroundRepo`.
+
+Run this SQL query:
+
+```sql
+SELECT state, worker, count(*) as count
+FROM oban_jobs
+GROUP BY state, worker
+ORDER BY state, count DESC
+```
+
+Present the results as a formatted table grouped by state. If there are failed or retryable jobs, show their error details.

.claude/commands/precommit.md

@@ -0,0 +1 @@
+Run the full pre-commit check pipeline (`mix precommit`) and report the results. If any check fails, identify the specific failure and suggest a fix.

.claude/hooks/format-elixir.sh

@@ -0,0 +1,12 @@
+#!/bin/bash
+set -e
+
+INPUT=$(cat)
+FILE_PATH=$(echo "$INPUT" | jq -r '.tool_input.file_path')
+
+if [[ "$FILE_PATH" == *.ex ]] || [[ "$FILE_PATH" == *.exs ]] || [[ "$FILE_PATH" == *.heex ]]; then
+  cd "$CLAUDE_PROJECT_DIR"
+  mix format "$FILE_PATH" 2>/dev/null || true
+fi
+
+exit 0

.claude/hooks/gettext-extract.sh

@@ -0,0 +1,12 @@
+#!/bin/bash
+set -e
+
+INPUT=$(cat)
+FILE_PATH=$(echo "$INPUT" | jq -r '.tool_input.file_path')
+
+if [[ "$FILE_PATH" == *.heex ]]; then
+  cd "$CLAUDE_PROJECT_DIR"
+  mix gettext.extract --merge 2>/dev/null || true
+fi
+
+exit 0

.claude/settings.local.json

@@ -3,6 +3,8 @@
     "allow": [
       "mcp__tidewave__get_ecto_schemas",
       "Bash(mix test:*)",
+      "Bash(mix test)",
+      "Bash(mix test *)",
       "mcp__tidewave__get_source_location",
       "WebFetch(domain:hexdocs.pm)",
       "mcp__tidewave__execute_sql_query",
@@ -51,6 +53,7 @@
       "Bash(gh issue:*)",
       "Bash(mise run:*)",
       "Bash(gh label:*)",
+      "Bash(mix sobelow:*)",
       "mcp__plugin_chrome-devtools-mcp_chrome-devtools__list_pages",
       "mcp__plugin_chrome-devtools-mcp_chrome-devtools__navigate_page",
       "mcp__plugin_chrome-devtools-mcp_chrome-devtools__take_screenshot",
@@ -58,7 +61,35 @@
       "mcp__plugin_chrome-devtools-mcp_chrome-devtools__fill",
       "mcp__plugin_chrome-devtools-mcp_chrome-devtools__click",
       "mcp__plugin_chrome-devtools-mcp_chrome-devtools__evaluate_script",
-      "mcp__plugin_chrome-devtools-mcp_chrome-devtools__new_page"
+      "mcp__plugin_chrome-devtools-mcp_chrome-devtools__new_page",
+      "mcp__plugin_chrome-devtools-mcp_chrome-devtools__select_page",
+      "mcp__plugin_chrome-devtools-mcp_chrome-devtools__list_network_requests",
+      "mcp__plugin_chrome-devtools-mcp_chrome-devtools__get_network_request",
+      "mcp__plugin_chrome-devtools-mcp_chrome-devtools__list_console_messages",
+      "mcp__plugin_chrome-devtools-mcp_chrome-devtools__get_console_message",
+      "mcp__plugin_chrome-devtools-mcp_chrome-devtools__hover",
+      "mcp__plugin_chrome-devtools-mcp_chrome-devtools__press_key",
+      "mcp__plugin_chrome-devtools-mcp_chrome-devtools__wait_for"
+    ]
+  },
+  "hooks": {
+    "PostToolUse": [
+      {
+        "matcher": "Edit|Write",
+        "hooks": [
+          {
+            "type": "command",
+            "command": "\"$CLAUDE_PROJECT_DIR\"/.claude/hooks/format-elixir.sh",
+            "timeout": 30
+          },
+          {
+            "type": "command",
+            "command": "\"$CLAUDE_PROJECT_DIR\"/.claude/hooks/gettext-extract.sh",
+            "timeout": 30,
+            "async": true
+          }
+        ]
+      }
     ]
   },
   "enableAllProjectMcpServers": false

mix.exs

@@ -161,7 +161,10 @@ defmodule MusicLibrary.MixProject do
       ],
       "ecto.setup": ["ecto.create", "ecto.migrate"],
       "ecto.reset": ["ecto.drop", "ecto.setup"],
-      shellcheck: "cmd fd . 'scripts/' --exclude '*.hurl' -t file --exec shellcheck --color",
+      shellcheck: [
+        "cmd fd . 'scripts/' --exclude '*.hurl' -t file --exec shellcheck --color",
+        "cmd fd . '.claude/hooks' -t file --exec shellcheck --color"
+      ],
       lint: [
         "format",
         "credo",