fix(pseo): error details collapse + UNIQUE constraint on slug

1. Stop HTMX polling on job rows that have an error set, so the
   <details> element stays open when clicked (was being replaced
   every 2s by the poll cycle).

2. Migration 0030: drop redundant single-column UNIQUE on
   articles.slug — the real uniqueness key is (url_path, language).
   The slug index is kept for lookups.

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

CHANGELOG.md

@@ -6,6 +6,10 @@ The format is based on [Keep a Changelog](https://keepachangelog.com/en/1.1.0/).
 
 ## [Unreleased]
 
+### Fixed
+- **pSEO error details collapse** — clicking "Error" on a job row expanded the details, but they collapsed after ~2s because HTMX polling replaced the `<tr>`. Jobs with errors now stop polling, keeping the `<details>` element stable.
+- **UNIQUE constraint on article slug** — `ON CONFLICT(url_path, language)` upsert failed because a separate single-column `UNIQUE` on `slug` fired first. Migration 0030 drops the redundant `UNIQUE` from `slug` (keeps the index for lookups and the composite `UNIQUE(url_path, language)`).
+
 ### Changed
 - **Opportunity Score v7 → v8** — better spread and discrimination across the full 0-100 range. Addressable market weight reduced (20→15 pts) with steeper sqrt curve (ceiling 1M, was LN/500K). Economic power reduced (15→10 pts). Supply deficit increased (40→50 pts) with market existence dampener: countries with zero padel venues get max 5 pts supply deficit (factor 0.1), scaling linearly to full credit at 50+ venues. NULL nearest-court distance now treated as 0 (assume nearby) instead of 0.5. Added `country_percentile` output column (PERCENT_RANK within country). Target: P5-P95 spread ≥40 pts (was 22), zero-venue countries avg <30.
 - **Single-score simplification** — consolidated two public-facing scores (Market Score + Opportunity Score) into one **Padelnomics Score** (internally: `opportunity_score`). All maps, tooltips, article templates, and the methodology page now show a single score. Dual-ring markers reverted to single-color markers. `/market-score` route renamed to `/padelnomics-score` (old URL 301-redirects). All `mscore_*` i18n keys replaced with `pnscore_*`. Business plan queries `opportunity_score` from `location_profiles` (replaces legacy `city_market_overview` view). Map tooltip strings now i18n'd via `window.__MAP_T` (12 keys, EN + DE).

web/src/padelnomics/admin/templates/admin/pseo_job_status.html

@@ -5,7 +5,7 @@
 {% set pct = [((job.progress_current / job.progress_total) * 100) | int, 100] | min if job.progress_total else 0 %}
 
 <tr id="job-{{ job.id }}"
-    {% if job.status == 'pending' %}
+    {% if job.status == 'pending' and not job.error %}
     hx-get="{{ url_for('pseo.pseo_job_status', job_id=job.id) }}"
     hx-trigger="every 2s"
     hx-target="this"

web/src/padelnomics/migrations/versions/0030_drop_slug_unique.py

@@ -0,0 +1,93 @@
+"""Drop UNIQUE constraint from articles.slug column.
+
+The single-column UNIQUE on slug conflicts with the ON CONFLICT(url_path, language)
+upsert in pSEO generation, causing 'UNIQUE constraint failed: articles.slug' errors
+when re-running generation for the same template.
+
+The slug is already unique by construction ({template_slug}-{lang}-{natural_key}),
+and the real uniqueness key is (url_path, language). The idx_articles_slug index
+is kept for fast lookups.
+"""
+
+
+def up(conn) -> None:
+    # ── 1. Drop FTS triggers + virtual table ──────────────────────────────────
+    conn.execute("DROP TRIGGER IF EXISTS articles_ai")
+    conn.execute("DROP TRIGGER IF EXISTS articles_ad")
+    conn.execute("DROP TRIGGER IF EXISTS articles_au")
+    conn.execute("DROP TABLE IF EXISTS articles_fts")
+
+    # ── 2. Recreate articles without UNIQUE on slug ───────────────────────────
+    conn.execute("""
+        CREATE TABLE articles_new (
+            id               INTEGER PRIMARY KEY AUTOINCREMENT,
+            url_path         TEXT NOT NULL,
+            slug             TEXT NOT NULL,
+            title            TEXT NOT NULL,
+            meta_description TEXT,
+            country          TEXT,
+            region           TEXT,
+            og_image_url     TEXT,
+            status           TEXT NOT NULL DEFAULT 'draft',
+            published_at     TEXT,
+            template_slug    TEXT,
+            language         TEXT NOT NULL DEFAULT 'en',
+            date_modified    TEXT,
+            seo_head         TEXT,
+            created_at       TEXT NOT NULL DEFAULT (datetime('now')),
+            updated_at       TEXT,
+            group_key        TEXT DEFAULT NULL,
+            noindex          INTEGER NOT NULL DEFAULT 0,
+            article_type     TEXT NOT NULL DEFAULT 'editorial',
+            UNIQUE(url_path, language)
+        )
+    """)
+    conn.execute("""
+        INSERT INTO articles_new
+            (id, url_path, slug, title, meta_description, country, region,
+             og_image_url, status, published_at, template_slug, language,
+             date_modified, seo_head, created_at, updated_at, group_key,
+             noindex, article_type)
+        SELECT id, url_path, slug, title, meta_description, country, region,
+               og_image_url, status, published_at, template_slug, language,
+               date_modified, seo_head, created_at, updated_at, group_key,
+               noindex, article_type
+        FROM articles
+    """)
+    conn.execute("DROP TABLE articles")
+    conn.execute("ALTER TABLE articles_new RENAME TO articles")
+
+    # ── 3. Recreate indexes ───────────────────────────────────────────────────
+    conn.execute("CREATE INDEX IF NOT EXISTS idx_articles_url_path ON articles(url_path)")
+    conn.execute("CREATE INDEX IF NOT EXISTS idx_articles_url_lang ON articles(url_path, language)")
+    conn.execute("CREATE INDEX IF NOT EXISTS idx_articles_slug ON articles(slug)")
+    conn.execute("CREATE INDEX IF NOT EXISTS idx_articles_status ON articles(status, published_at)")
+    conn.execute("CREATE INDEX IF NOT EXISTS idx_articles_article_type ON articles(article_type)")
+
+    # ── 4. Recreate FTS + triggers ────────────────────────────────────────────
+    conn.execute("""
+        CREATE VIRTUAL TABLE IF NOT EXISTS articles_fts USING fts5(
+            title, meta_description, country, region,
+            content='articles', content_rowid='id'
+        )
+    """)
+    conn.execute("""
+        CREATE TRIGGER IF NOT EXISTS articles_ai AFTER INSERT ON articles BEGIN
+            INSERT INTO articles_fts(rowid, title, meta_description, country, region)
+            VALUES (new.id, new.title, new.meta_description, new.country, new.region);
+        END
+    """)
+    conn.execute("""
+        CREATE TRIGGER IF NOT EXISTS articles_ad AFTER DELETE ON articles BEGIN
+            INSERT INTO articles_fts(articles_fts, rowid, title, meta_description, country, region)
+            VALUES ('delete', old.id, old.title, old.meta_description, old.country, old.region);
+        END
+    """)
+    conn.execute("""
+        CREATE TRIGGER IF NOT EXISTS articles_au AFTER UPDATE ON articles BEGIN
+            INSERT INTO articles_fts(articles_fts, rowid, title, meta_description, country, region)
+            VALUES ('delete', old.id, old.title, old.meta_description, old.country, old.region);
+            INSERT INTO articles_fts(rowid, title, meta_description, country, region)
+            VALUES (new.id, new.title, new.meta_description, new.country, new.region);
+        END
+    """)