Update docs to reflect date+time+title slug format

- qa-test-plan: update expected folder, URL, and automation greps in
  TC-P.5, TC-P.6, TC-P.7; add slug explanation block to test data;
  rewrite TC-P.10 to cover two posts on the same day (now valid)
- bugs-and-fixes: add BUG-003 documenting the silent duplicate-date
  failure and the slug fix

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

docs/bugs-and-fixes.md

@@ -33,7 +33,7 @@ Wire cache-clear into the form process so it happens automatically on every succ
 
 1. Create a small plugin `user/plugins/cache-on-save/` with one event listener:
    - Listen on `onFormProcessed`
-   - When the form name is `new-entry`, call `$this->grav['cache']->clear()`
+   - When the form name is `new-entry`, call `$this->grav['cache']->deleteAll()` (note: `clear()` does not exist on `Grav\Common\Cache` in Grav 1.7)
 2. Enable the plugin in `user/config/plugins/cache-on-save.yaml`
 
 This is the cleanest approach: it fires exactly once per successful submission, requires no changes to `post-form.md`, and works for any future forms too.
@@ -102,3 +102,35 @@ Acceptable for a single-user dev setup — eliminates both BUG-001's side-effect
 2. Reload any page — no 500 error, template works immediately without manual cache flush
 
 ---
+
+## BUG-003 — One post per day limit; silent failure on duplicate date
+
+**Status:** fixed 2026-06-18
+**Reported:** 2026-06-18
+
+### Symptom
+
+Submitting a second post with the same date as an existing entry shows "Entry posted successfully!" but creates no file. The user's post is silently discarded.
+
+### Root cause
+
+The `add-page-by-form` plugin built the page slug from date only (`Y-m-d`), producing folder names like `2026-06-18.entry`. With `overwrite_mode: false`, if that folder already exists the plugin skips page creation but does not abort — the `message` process step runs regardless, showing a false success.
+
+### Fix
+
+Change the slug template in `user/pages/02.post/post-form.md` to include time and title:
+
+```twig
+{{ form.value.date|date('Y-m-d-Hi') }}-{{ form.value.title|lower|regex_replace('/[^a-z0-9]+/', '-')|trim('-') }}
+```
+
+Example: title "Arrived in Tokyo" at 14:30 on 2026-06-18 → `2026-06-18-1430-arrived-in-tokyo`
+
+The slug is locked at creation time. Renaming the title afterwards does not change the URL.
+
+### Acceptance criteria
+
+1. Submit two posts on the same day with different times or titles — both appear in `/tracker` as separate entries
+2. Renaming a post's title in the frontmatter does not break its URL
+
+---

docs/qa-test-plan.md

@@ -336,6 +336,12 @@ These scenarios cover the full round-trip: filling the form → saving → verif
 | Longitude | `139.691711` |
 | Photos | none (keep simple for first run) |
 
+**Expected slug:** `2026-06-18-1000-qa-test-entry`
+**Expected folder:** `2026-06-18-1000-qa-test-entry.entry/`
+**Expected URL:** `/tracker/2026-06-18-1000-qa-test-entry.entry`
+
+The slug is built from `date(Y-m-d-Hi)` + title lowercased with `[^a-z0-9]+` replaced by hyphens.
+
 ---
 
 ### TC-P.1: Post form requires authentication
@@ -405,8 +411,8 @@ These scenarios cover the full round-trip: filling the form → saving → verif
 | Step | Action | Expected Result |
 |---|---|---|
 | 1 | After TC-P.4 completes | — |
-| 2 | Check directory `user/pages/01.tracker/` | Folder `2026-06-18.entry/` exists (add-page-by-form appends template name per `physical_template_name: true`) |
+| 2 | Check directory `user/pages/01.tracker/` | Folder `2026-06-18-1000-qa-test-entry.entry/` exists (add-page-by-form appends template name per `physical_template_name: true`) |
-| 3 | Read `user/pages/01.tracker/2026-06-18.entry/entry.md` | File exists |
+| 3 | Read `user/pages/01.tracker/2026-06-18-1000-qa-test-entry.entry/entry.md` | File exists |
 | 4 | Verify frontmatter `title` | Equals `QA Test Entry` |
 | 5 | Verify frontmatter `date` | Equals `2026-06-18 10:00` |
 | 6 | Verify frontmatter `location_city` | Equals `Tokyo` |
@@ -430,10 +436,10 @@ These scenarios cover the full round-trip: filling the form → saving → verif
 | 3 | Entry card present | Card with title `QA Test Entry` visible |
 | 4 | Date shown on card | `18 Jun 2026` |
 | 5 | Location badge on card | `📍 Tokyo, Japan` visible |
-| 6 | Entry card link | `href` points to `/tracker/2026-06-18.entry` |
+| 6 | Entry card link | `href` points to `/tracker/2026-06-18-1000-qa-test-entry.entry` |
 | 7 | Excerpt shown | Partial text of the body content visible |
 
-**Automation:** curl /tracker; grep for "QA Test Entry", "18 Jun 2026", "Tokyo", "Japan", "/tracker/2026-06-18.entry"
+**Automation:** curl /tracker; grep for "QA Test Entry", "18 Jun 2026", "Tokyo", "Japan", "/tracker/2026-06-18-1000-qa-test-entry.entry"
 
 ---
 
@@ -441,7 +447,7 @@ These scenarios cover the full round-trip: filling the form → saving → verif
 
 | Step | Action | Expected Result |
 |---|---|---|
-| 1 | GET http://100.96.115.96:8081/tracker/2026-06-18.entry | Page loads (200) |
+| 1 | GET http://100.96.115.96:8081/tracker/2026-06-18-1000-qa-test-entry.entry | Page loads (200) |
 | 2 | Page title | `QA Test Entry` in `<h1>` |
 | 3 | Date header | `Thursday, 18 June 2026` (or locale equivalent) |
 | 4 | Location badge | `📍 Tokyo, Japan` |
@@ -449,7 +455,7 @@ These scenarios cover the full round-trip: filling the form → saving → verif
 | 6 | No gallery | Photo gallery section absent (no photos were uploaded) |
 | 7 | Back link | `← Back to journal` link present, points to /tracker |
 
-**Automation:** curl /tracker/2026-06-18.entry; grep for "QA Test Entry", "Tokyo", "Japan", "This is the QA test body", "Back to journal"
+**Automation:** curl /tracker/2026-06-18-1000-qa-test-entry.entry; grep for "QA Test Entry", "Tokyo", "Japan", "This is the QA test body", "Back to journal"
 
 ---
 
@@ -478,17 +484,18 @@ These scenarios cover the full round-trip: filling the form → saving → verif
 
 ---
 
-### TC-P.10: Duplicate date handling
+### TC-P.10: Two posts on the same day
 
 | Step | Action | Expected Result |
 |---|---|---|
-| 1 | Submit a second post with the same date `2026-06-18 10:00` | — |
+| 1 | Submit a first post: date `2026-06-18 10:00`, title `Morning Update` | Success message shown |
-| 2 | Observe result | Either: error shown, OR new entry created at a different slug |
+| 2 | Submit a second post: date `2026-06-18 14:30`, title `Afternoon Update` | Success message shown |
-| 3 | Check filesystem | No silent data loss — original entry intact |
+| 3 | Check filesystem | Two separate folders exist: `2026-06-18-1000-morning-update.entry/` and `2026-06-18-1430-afternoon-update.entry/` |
+| 4 | Visit /tracker | Both entries visible as separate cards |
 
-**Note:** `overwrite_mode: false` on add-page-by-form plugin should prevent overwrite. Behavior on conflict is to be documented here after first run.
+**Note:** The slug encodes date + time + title, so same-day posts are fully supported as long as they have different times or titles. A true collision (same date, same time, same title) would silently fail — treat this as acceptable given solo use.
 
-**Manual verification required:** Requires two submissions with same date
+**Manual verification required:** Requires two browser submissions
 
 ---