docs(01): create phase 1 plans

Phase 01: Foundation & Setup
- 3 plans created (all independent, can run parallel)
- 7 total tasks defined
- Ready for execution

Plans:
- 01-01: Plugin structure and activation hooks
- 01-02: Register job_offer CPT with capabilities
- 01-03: Register ddhh_provider role and ACF fields

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

.planning/phases/01-foundation-setup/01-02-PLAN.md

@@ -0,0 +1,141 @@
+---
+phase: 01-foundation-setup
+plan: 02
+type: execute
+depends_on: []
+files_modified: [includes/class-post-types.php]
+---
+
+<objective>
+Register custom post type `job_offer` with proper capabilities, labels, and support for Elementor templates.
+
+Purpose: Create the data structure for job listings that providers will manage and mentors will browse.
+Output: Functional `job_offer` CPT with correct capabilities and features.
+</objective>
+
+<execution_context>
+~/.claude/get-shit-done/workflows/execute-plan.md
+./summary.md
+</execution_context>
+
+<context>
+@.planning/PROJECT.md
+@.planning/ROADMAP.md
+@.planning/STATE.md
+
+**From PROJECT.md:**
+- Custom role `ddhh_provider` with restricted capabilities
+- Providers can only edit their own posts
+- No WP-Admin access for providers (except profile)
+
+**Security requirement:** Use `map_meta_cap` filter to enforce ownership
+</context>
+
+<tasks>
+
+<task type="auto">
+  <name>Task 1: Register job_offer custom post type</name>
+  <files>includes/class-post-types.php</files>
+  <action>
+Create `DDHH_JM_Post_Types` class with static register() method.
+
+Register CPT 'job_offer' with register_post_type():
+- Labels: Singular "Jobangebot", Plural "Jobangebote", menu_name "Jobs" (German, as per PROJECT.md)
+- public: true
+- show_ui: true
+- show_in_menu: true
+- menu_position: 5 (below Posts)
+- menu_icon: 'dashicons-businessperson'
+- supports: ['title', 'editor', 'author', 'thumbnail']
+- has_archive: true
+- rewrite: ['slug' => 'jobangebote']
+- capability_type: 'job_offer' (custom capabilities)
+- map_meta_cap: true (enables per-post capability checks)
+- show_in_rest: true (Gutenberg + Elementor support)
+
+Custom capabilities:
+- edit_posts: 'edit_job_offers'
+- edit_others_posts: 'edit_others_job_offers'
+- publish_posts: 'publish_job_offers'
+- read_private_posts: 'read_private_job_offers'
+- delete_posts: 'delete_job_offers'
+
+Hook register() to 'init' action in main class.
+
+DO NOT use 'post' as capability_type — this would give providers access to regular posts.
+  </action>
+  <verify>CPT appears in WordPress admin menu, archive URL works (even if empty)</verify>
+  <done>job_offer CPT registered with custom capabilities and Elementor support</done>
+</task>
+
+<task type="auto">
+  <name>Task 2: Add capability mapping filter for ownership enforcement</name>
+  <files>includes/class-post-types.php</files>
+  <action>
+Add static method `map_job_offer_capabilities($caps, $cap, $user_id, $args)` hooked to 'map_meta_cap' filter.
+
+Logic:
+- If $cap is 'edit_job_offer' or 'delete_job_offer':
+  - Check if post author == $user_id
+  - If yes: return ['edit_job_offers'] (allow)
+  - If no: return ['edit_others_job_offers'] (deny for providers, allow for admins)
+- For all other caps: return $caps unchanged
+
+This ensures providers can ONLY edit/delete their own job_offer posts, never others'.
+
+WordPress will automatically check these capabilities against user roles.
+  </action>
+  <verify>Logic is sound: non-author providers cannot edit others' posts</verify>
+  <done>Capability mapping enforces post ownership, providers restricted to own posts</done>
+</task>
+
+</tasks>
+
+<verification>
+Before declaring plan complete:
+- [ ] CPT registered with correct labels (German)
+- [ ] Custom capability_type prevents capability leakage to regular posts
+- [ ] map_meta_cap filter enforces ownership
+- [ ] show_in_rest enabled for Elementor compatibility
+</verification>
+
+<success_criteria>
+
+- All tasks completed
+- CPT registered with custom capabilities
+- Ownership enforcement via map_meta_cap
+- Ready for ACF field registration in next plan
+</success_criteria>
+
+<output>
+After completion, create `.planning/phases/01-foundation-setup/01-02-SUMMARY.md`:
+
+# Phase 1 Plan 2: Custom Post Type Summary
+
+**`job_offer` CPT registered with ownership-enforced capabilities**
+
+## Accomplishments
+
+- Custom post type 'job_offer' with German labels
+- Custom capability type prevents access to regular posts
+- map_meta_cap filter enforces per-post ownership
+- Elementor support via show_in_rest
+
+## Files Created/Modified
+
+- `includes/class-post-types.php` - CPT registration and capability mapping
+
+## Decisions Made
+
+- Used custom capability_type 'job_offer' (not 'post') for security
+- German labels: "Jobangebot" / "Jobangebote"
+- Archive slug: 'jobangebote'
+
+## Issues Encountered
+
+None
+
+## Next Step
+
+Ready for 01-03-PLAN.md (can run in parallel)
+</output>