feat: add Kokoro TTS, ranking page, direct HTTP strategy, and chapter-number fix

- Add Kokoro-FastAPI TTS integration to the chapter reader UI:
  - Browser-side MSE streaming with paragraph-level click-to-start
  - Voice selector, speed slider, auto-next with prefetch of the next chapter
  - New GET /ui/chapter-text endpoint that strips Markdown and serves plain text

- Add ranking page (novelfire /ranking scraper, WriteRanking/ReadRankingItems
  in writer, GET /ranking + POST /ranking/refresh + GET /ranking/view routes)
  with local-library annotation and one-click scrape buttons

- Add StrategyDirect (plain HTTP client) as a new browser strategy; the
  default strategy is now 'direct' for chapter fetching and 'content'
  for chapter-list URL retrieval (split via BROWSERLESS_URL_STRATEGY)

- Fix chapter numbering bug: numbers are now derived from the URL path
  (/chapter-N) rather than list position, correcting newest-first ordering

- Add 'refresh <slug>' CLI sub-command to re-scrape a book from its saved
  source_url without knowing the original URL

- Extend NovelScraper interface with RankingProvider (ScrapeRanking)

- Tune scraper timeouts: wait-for-selector reduced to 5 s, GotoOptions
  timeout set to 60 s, content/scrape client defaults raised to 90 s

- Add cover extraction fix (figure.cover > img rather than bare img.cover)

- Add AGENTS.md and .aiignore for AI tooling context

- Add integration tests for browser client and novelfire scraper (build
  tag: integration) and unit tests for chapterNumberFromURL and pagination

scraper/internal/browser/interface.go

@@ -21,6 +21,10 @@ const (
 	// DevTools Protocol). Most powerful; required for complex interactions
 	// (clicking, scrolling, waiting for network idle, etc.).
 	StrategyCDP Strategy = "cdp"
+
+	// StrategyDirect uses a plain HTTP client to fetch HTML directly.
+	// Suitable for sites that don't require JavaScript rendering.
+	StrategyDirect Strategy = "direct"
 )
 
 // WaitForSelector describes the waitForSelector option sent to Browserless.
@@ -29,12 +33,20 @@ type WaitForSelector struct {
 	Timeout  int    `json:"timeout,omitempty"` // ms
 }
 
+// GotoOptions controls page navigation behavior.
+type GotoOptions struct {
+	Timeout   int    `json:"timeout,omitempty"`   // ms
+	WaitUntil string `json:"waitUntil,omitempty"` // e.g., "networkidle2", "load"
+}
+
 // ContentRequest is the body sent to POST /content.
 type ContentRequest struct {
 	URL                 string           `json:"url"`
 	WaitFor             *WaitForSelector `json:"waitForSelector,omitempty"`
 	WaitForTimeout      int              `json:"waitForTimeout,omitempty"`      // ms
 	RejectResourceTypes []string         `json:"rejectResourceTypes,omitempty"` // e.g. ["image","stylesheet"]
+	GotoOptions         *GotoOptions     `json:"gotoOptions,omitempty"`
+	BestAttempt         bool             `json:"bestAttempt,omitempty"` // return partial content on timeout/error
 }
 
 // ScrapeElement is one element descriptor inside a ScrapeRequest.
@@ -45,9 +57,10 @@ type ScrapeElement struct {
 
 // ScrapeRequest is the body sent to POST /scrape.
 type ScrapeRequest struct {
-	URL      string           `json:"url"`
-	Elements []ScrapeElement  `json:"elements"`
-	WaitFor  *WaitForSelector `json:"waitForSelector,omitempty"`
+	URL         string           `json:"url"`
+	Elements    []ScrapeElement  `json:"elements"`
+	WaitFor     *WaitForSelector `json:"waitForSelector,omitempty"`
+	GotoOptions *GotoOptions     `json:"gotoOptions,omitempty"`
 }
 
 // ScrapeResult is one entry in the response from POST /scrape.